2022
Morales-Saldaña, Saddan; Valencia-Ávalos, Susana; Oyama, Ken; Tovar-Sánchez, Efraín; Hipp, Andrew L.; González-Rodríguez, Antonio
Even more oak species in Mexico? Genetic structure and morphological differentiation support the presence of at least two specific entities within Quercus laeta Artículo de revista
En: Journal of Systematics and Evolution, vol. 60, iss. 5, pp. 1124-1139, 2022, ISSN: 17596831.
Resumen | Enlaces | Etiquetas: gene flow, genetic differentiation, leaf morphometrics, microsatellite loci, morphotype, population assignment, species delimitation
@article{nokey,
title = {Even more oak species in Mexico? Genetic structure and morphological differentiation support the presence of at least two specific entities within Quercus laeta},
author = {Saddan Morales-Saldaña and Susana Valencia-Ávalos and Ken Oyama and Efraín Tovar-Sánchez and Andrew L. Hipp and Antonio González-Rodríguez},
doi = {10.1111/jse.12818},
issn = {17596831},
year = {2022},
date = {2022-01-01},
journal = {Journal of Systematics and Evolution},
volume = {60},
issue = {5},
pages = {1124-1139},
publisher = {John Wiley and Sons Inc},
abstract = {Differentiation among populations, sometimes despite ongoing gene exchange, is a key step in speciation. Therefore, comparison of intra- and interspecific differentiation patterns is of great significance to understanding speciation. The genus Quercus is an interesting system to test speciation models in the presence of gene flow, due to its weak interspecific reproductive barriers. The aim of the present study was to characterize the degree and pattern of morphological and genetic differentiation among different morphotypes in the white oak Quercus laeta, some corresponding to the previously described species Quercus centralis, Q. laeta, Quercus prinopsis, and Quercus transmontana, as well as geographically structured variation within Q. transmontana not described previously. Our goal was to evaluate if some of these can be considered distinct specific entities or are rather part of a continuum of variation. Nine microsatellite loci and two intergenic regions of chloroplast DNA were analyzed. Morphological differences were evaluated using geometric morphometrics. Chloroplast DNA showed low differentiation, suggesting introgression or sharing of ancestral haplotypes among the Q. laeta morphotypes. Nuclear microsatellites indicated differentiation into two distinct main genetic groups, which were congruent with morphological differentiation. In conclusion, nuclear markers and morphological variations suggest the existence of at least two different entities within Q. laeta.},
keywords = {gene flow, genetic differentiation, leaf morphometrics, microsatellite loci, morphotype, population assignment, species delimitation},
pubstate = {published},
tppubtype = {article}
}
Differentiation among populations, sometimes despite ongoing gene exchange, is a key step in speciation. Therefore, comparison of intra- and interspecific differentiation patterns is of great significance to understanding speciation. The genus Quercus is an interesting system to test speciation models in the presence of gene flow, due to its weak interspecific reproductive barriers. The aim of the present study was to characterize the degree and pattern of morphological and genetic differentiation among different morphotypes in the white oak Quercus laeta, some corresponding to the previously described species Quercus centralis, Q. laeta, Quercus prinopsis, and Quercus transmontana, as well as geographically structured variation within Q. transmontana not described previously. Our goal was to evaluate if some of these can be considered distinct specific entities or are rather part of a continuum of variation. Nine microsatellite loci and two intergenic regions of chloroplast DNA were analyzed. Morphological differences were evaluated using geometric morphometrics. Chloroplast DNA showed low differentiation, suggesting introgression or sharing of ancestral haplotypes among the Q. laeta morphotypes. Nuclear microsatellites indicated differentiation into two distinct main genetic groups, which were congruent with morphological differentiation. In conclusion, nuclear markers and morphological variations suggest the existence of at least two different entities within Q. laeta.
Maldonado-López, Yurixhi; Araújo, Walter Santos; González-Rodríguez, Antonio; Oyama, Ken; Fagundes, Marcilio; Diaz-Castelazo, Cecilia; Sánchez-Echeverría, Karina; Borges, Magno; Pérez-López, Griselda; Cuevas-Reyes, Pablo
Quantitative trophic networks of insect gallers and their parasitoids in the hybrid oak complex Quercus magnoliifolia x Quercus resinosa Artículo de revista
En: Arthropod-Plant Interactions, vol. 16, iss. 6, pp. 631-643, 2022, ISSN: 18728847.
Resumen | Enlaces | Etiquetas: Gallers, Herbivore-parasitoid interactions, Hybrid complex, Oaks, Parasitoids, Trophic networks
@article{nokey,
title = {Quantitative trophic networks of insect gallers and their parasitoids in the hybrid oak complex Quercus magnoliifolia x Quercus resinosa},
author = {Yurixhi Maldonado-López and Walter Santos Araújo and Antonio González-Rodríguez and Ken Oyama and Marcilio Fagundes and Cecilia Diaz-Castelazo and Karina Sánchez-Echeverría and Magno Borges and Griselda Pérez-López and Pablo Cuevas-Reyes},
doi = {10.1007/s11829-022-09927-8},
issn = {18728847},
year = {2022},
date = {2022-01-01},
journal = {Arthropod-Plant Interactions},
volume = {16},
issue = {6},
pages = {631-643},
publisher = {Springer Science and Business Media B.V.},
abstract = {Oak hybridization have important effects on the structure of herbivorous insect communities and associated natural enemies. We tested the effects of hybridization between Q. magnoliifolia and Q. resinosa on insect gallers trophic networks and their parasitoids. We characterized the genotypes of 35 individuals of Q. magnoliifolia, 30 of Q. resinosa, and 57 hybrids using eight nuclear microsatellite markers. We collected 6,798 galls from the oak hybrid complex distributed in 33 gall morphospecies on Q. magnoliifolia, 28 on Q. resinosa, and 42 on hybrid oaks. Galler-parasitoid networks were realized by 21 gall morphospecies and 21 parasitoid species for Q. magnoliifolia; 16 gall morphospecies and 30 parasitoid species for Q. resinosa; and 25 gall morphospecies and 23 parasitoid species for hybrids. Plant-galler networks were different among three oak groups, having the hybrid network higher values of diversity of interactions, nestedness and modularity and lower values of specialization than Q. magnoliifolia and Q. resinosa networks. Hybrid network of gallers and parasitoids had higher diversity of interactions, connectance and generality and lower modularity than Q. magnoliifolia and Q. resinosa networks. Hybrids are more vulnerable to insect galler incidence having low pressure by parasitoids, which allow more gall incidence in hybrid plants. Our study corroborated that hybridization generates changes in oak genetic composition influencing insect gallers trophic networks and their parasitoids. Our findings are also consistent with the rule of genetic similarity which suggest a relationship between plant genetics and the associated arthropod community, where genetically similar plants support similar arthropod communities.},
keywords = {Gallers, Herbivore-parasitoid interactions, Hybrid complex, Oaks, Parasitoids, Trophic networks},
pubstate = {published},
tppubtype = {article}
}
Oak hybridization have important effects on the structure of herbivorous insect communities and associated natural enemies. We tested the effects of hybridization between Q. magnoliifolia and Q. resinosa on insect gallers trophic networks and their parasitoids. We characterized the genotypes of 35 individuals of Q. magnoliifolia, 30 of Q. resinosa, and 57 hybrids using eight nuclear microsatellite markers. We collected 6,798 galls from the oak hybrid complex distributed in 33 gall morphospecies on Q. magnoliifolia, 28 on Q. resinosa, and 42 on hybrid oaks. Galler-parasitoid networks were realized by 21 gall morphospecies and 21 parasitoid species for Q. magnoliifolia; 16 gall morphospecies and 30 parasitoid species for Q. resinosa; and 25 gall morphospecies and 23 parasitoid species for hybrids. Plant-galler networks were different among three oak groups, having the hybrid network higher values of diversity of interactions, nestedness and modularity and lower values of specialization than Q. magnoliifolia and Q. resinosa networks. Hybrid network of gallers and parasitoids had higher diversity of interactions, connectance and generality and lower modularity than Q. magnoliifolia and Q. resinosa networks. Hybrids are more vulnerable to insect galler incidence having low pressure by parasitoids, which allow more gall incidence in hybrid plants. Our study corroborated that hybridization generates changes in oak genetic composition influencing insect gallers trophic networks and their parasitoids. Our findings are also consistent with the rule of genetic similarity which suggest a relationship between plant genetics and the associated arthropod community, where genetically similar plants support similar arthropod communities.
Rico, Leonardo Meza; Aguilar-Romero, Rafael; Paz, Horacio; Rodríguez-Correa, Hernando; González-Rodríguez, Antonio; Oyama, Ken; Pineda-Garcia, Fernando
Functional differentiation among Mexican oak species is guided by the fast–slow continuum but above and belowground resource use strategies are weakly coordinated Artículo de revista
En: Trees - Structure and Function, vol. 36, iss. 2, pp. 627-643, 2022, ISSN: 09311890.
Resumen | Enlaces | Etiquetas: Functional trade-offs, Quercus seedlings, Root depth, Root–shoot coordination
@article{Rico2022,
title = {Functional differentiation among Mexican oak species is guided by the fast–slow continuum but above and belowground resource use strategies are weakly coordinated},
author = {Leonardo Meza Rico and Rafael Aguilar-Romero and Horacio Paz and Hernando Rodríguez-Correa and Antonio González-Rodríguez and Ken Oyama and Fernando Pineda-Garcia},
doi = {10.1007/s00468-021-02235-3},
issn = {09311890},
year = {2022},
date = {2022-01-01},
journal = {Trees - Structure and Function},
volume = {36},
issue = {2},
pages = {627-643},
publisher = {Springer Science and Business Media Deutschland GmbH},
abstract = {Key message: Oak species displayed high interspecific functional trait variation. The resource use strategy among oaks both at the above and belowground organs was guided by the fast-slow continuum. Abstract: Plant functional ecology has focused on the study of functional strategies and general patterns of trait covariation. Mostly, studies intend to elucidate how plants cope with resource capture both at the above and belowground organs and to understand how the capacity for resource gain relates with the species distribution. American oaks are an interesting and important tree clade, they radiated into diverse environments outside temperate regions implying the development of adaptations to persist under different environmental regimes. Therefore, we explored patterns of differentiation in functional traits related with the capacity for resource use in 3-month seedlings of ten Mexican oak species representative from semiarid, temperate and subtropical montane regions. We examined the fast–slow trade-off and its importance in species differentiation on both above and belowground organs. Additionally, we investigated how resource acquisition strategy of the species was related with the environmental conditions experienced in their habitats. We found a significant differentiation in both above and belowground traits, and in both cases oak species segregated along the fast–slow continuum. We found only a few significant trait-by-trait relationships, implying a weak coordination among aerial and subterranean organs. Additionally, species from sites with higher precipitation seasonality had a higher root growth, and species from humid sites had larger leaves. These findings highlight important functional variation among oak seedlings which was related with the climatic conditions encompassed along their native geographic range.},
keywords = {Functional trade-offs, Quercus seedlings, Root depth, Root–shoot coordination},
pubstate = {published},
tppubtype = {article}
}
Key message: Oak species displayed high interspecific functional trait variation. The resource use strategy among oaks both at the above and belowground organs was guided by the fast-slow continuum. Abstract: Plant functional ecology has focused on the study of functional strategies and general patterns of trait covariation. Mostly, studies intend to elucidate how plants cope with resource capture both at the above and belowground organs and to understand how the capacity for resource gain relates with the species distribution. American oaks are an interesting and important tree clade, they radiated into diverse environments outside temperate regions implying the development of adaptations to persist under different environmental regimes. Therefore, we explored patterns of differentiation in functional traits related with the capacity for resource use in 3-month seedlings of ten Mexican oak species representative from semiarid, temperate and subtropical montane regions. We examined the fast–slow trade-off and its importance in species differentiation on both above and belowground organs. Additionally, we investigated how resource acquisition strategy of the species was related with the environmental conditions experienced in their habitats. We found a significant differentiation in both above and belowground traits, and in both cases oak species segregated along the fast–slow continuum. We found only a few significant trait-by-trait relationships, implying a weak coordination among aerial and subterranean organs. Additionally, species from sites with higher precipitation seasonality had a higher root growth, and species from humid sites had larger leaves. These findings highlight important functional variation among oak seedlings which was related with the climatic conditions encompassed along their native geographic range.
Ibarra-Laclette, Enrique; Venancio-Rodríguez, Carlos Ariel; Vásquez-Aguilar, Antonio Acini; Alonso-Sánchez, Alexandro G.; Pérez-Torres, Claudia Anahí; Villafán, Emanuel; Ramírez-Barahona, Santiago; Galicia, Sonia; Sosa, Victoria; Rebollar, Eria A.; Lara, Carlos; González-Rodríguez, Antonio; Díaz-Fleisher, Francisco; Ornelas, Juan Francisco
Transcriptional Basis for Haustorium Formation and Host Establishment in Hemiparasitic Psittacanthus schiedeanus Mistletoes Artículo de revista
En: Frontiers in Genetics, vol. 13, 2022, ISSN: 16648021.
Resumen | Enlaces | Etiquetas: haustorium, mistletoe, parasitic plant, Psittacanthus schiedeanus, transcriptome
@article{nokey,
title = {Transcriptional Basis for Haustorium Formation and Host Establishment in Hemiparasitic Psittacanthus schiedeanus Mistletoes},
author = {Enrique Ibarra-Laclette and Carlos Ariel Venancio-Rodríguez and Antonio Acini Vásquez-Aguilar and Alexandro G. Alonso-Sánchez and Claudia Anahí Pérez-Torres and Emanuel Villafán and Santiago Ramírez-Barahona and Sonia Galicia and Victoria Sosa and Eria A. Rebollar and Carlos Lara and Antonio González-Rodríguez and Francisco Díaz-Fleisher and Juan Francisco Ornelas},
doi = {10.3389/fgene.2022.929490},
issn = {16648021},
year = {2022},
date = {2022-01-01},
journal = {Frontiers in Genetics},
volume = {13},
publisher = {Frontiers Media S.A.},
abstract = {The mistletoe Psittacanthus schiedeanus, a keystone species in interaction networks between plants, pollinators, and seed dispersers, infects a wide range of native and non-native tree species of commercial interest. Here, using RNA-seq methodology we assembled the whole circularized quadripartite structure of P. schiedeanus chloroplast genome and described changes in the gene expression of the nuclear genomes across time of experimentally inoculated seeds. Of the 140,467 assembled and annotated uniGenes, 2,000 were identified as differentially expressed (DEGs) and were classified in six distinct clusters according to their expression profiles. DEGs were also classified in enriched functional categories related to synthesis, signaling, homoeostasis, and response to auxin and jasmonic acid. Since many orthologs are involved in lateral or adventitious root formation in other plant species, we propose that in P. schiedeanus (and perhaps in other rootless mistletoe species), these genes participate in haustorium formation by complex regulatory networks here described. Lastly, and according to the structural similarities of P. schiedeanus enzymes with those that are involved in host cell wall degradation in fungi, we suggest that a similar enzymatic arsenal is secreted extracellularly and used by mistletoes species to easily parasitize and break through tissues of the host.},
keywords = {haustorium, mistletoe, parasitic plant, Psittacanthus schiedeanus, transcriptome},
pubstate = {published},
tppubtype = {article}
}
The mistletoe Psittacanthus schiedeanus, a keystone species in interaction networks between plants, pollinators, and seed dispersers, infects a wide range of native and non-native tree species of commercial interest. Here, using RNA-seq methodology we assembled the whole circularized quadripartite structure of P. schiedeanus chloroplast genome and described changes in the gene expression of the nuclear genomes across time of experimentally inoculated seeds. Of the 140,467 assembled and annotated uniGenes, 2,000 were identified as differentially expressed (DEGs) and were classified in six distinct clusters according to their expression profiles. DEGs were also classified in enriched functional categories related to synthesis, signaling, homoeostasis, and response to auxin and jasmonic acid. Since many orthologs are involved in lateral or adventitious root formation in other plant species, we propose that in P. schiedeanus (and perhaps in other rootless mistletoe species), these genes participate in haustorium formation by complex regulatory networks here described. Lastly, and according to the structural similarities of P. schiedeanus enzymes with those that are involved in host cell wall degradation in fungi, we suggest that a similar enzymatic arsenal is secreted extracellularly and used by mistletoes species to easily parasitize and break through tissues of the host.
Standring, Samantha; Sánchez-Herrera, Melissa; Guillermo-Ferreira, Rhainer; Ware, Jessica L.; Vega-Sánchez, Yesenia Margarita; Clement, Rebecca; Drury, Jonathan P.; Grether, Gregory F.; González-Rodríguez, Antonio; Mendoza-Cuenca, Luis; Bota-Sierra, Cornelio A.; Bybee, Seth
Evolution and Biogeographic History of Rubyspot Damselflies (Hetaerininae: Calopterygidae: Odonata) Artículo de revista
En: Diversity, vol. 14, iss. 9, 2022, ISSN: 14242818.
Resumen | Enlaces | Etiquetas: biogeography, mating behavior, wing coloration, Zygoptera
@article{Standring2022,
title = {Evolution and Biogeographic History of Rubyspot Damselflies (Hetaerininae: Calopterygidae: Odonata)},
author = {Samantha Standring and Melissa Sánchez-Herrera and Rhainer Guillermo-Ferreira and Jessica L. Ware and Yesenia Margarita Vega-Sánchez and Rebecca Clement and Jonathan P. Drury and Gregory F. Grether and Antonio González-Rodríguez and Luis Mendoza-Cuenca and Cornelio A. Bota-Sierra and Seth Bybee},
doi = {10.3390/d14090757},
issn = {14242818},
year = {2022},
date = {2022-01-01},
journal = {Diversity},
volume = {14},
issue = {9},
publisher = {MDPI},
abstract = {The damselflies Hetaerininae, a subfamily of Calopterygidae, comprise four genera distributed from North to South America: Hetaerina, Mnesarete, Ormenophlebia and Bryoplathanon. While several studies have focused on the intriguing behavioral and morphological modifications within Hetaerina, little of the evolutionary history of the group is well understood. Understanding the biogeographical history of Hetaerininae is further complicated by uncertainty in important geological events, such as the closure of the Central American Seaway (CAS). We generated a phylogenetic hypothesis to test the relationships and divergence times within Hetaerininae using IQtree and BEAST2 and found that Mnesarete and Ormenophlebia render Hetaerina paraphyletic. Reclassification of the genera within Hetaerininae is necessary based on our results. We also tested the fit to our dataset of two different hypotheses for the closure of CAS. Our results supported a gradual closure, starting in the Oligocene and ending in the Pliocene. Using Ancestral Character State Reconstruction, we found that the rubyspot, which is associated with higher fecundity in several species, was ancestral for Hetaerininae and subsequently lost four times. Estimates of diversification in association with the rubyspot are needed to understand the plasticity of this important character. Forest habitat was the ancestral state for Hetaerininae, with transitions to generalist species of Hetaerina found primarily in the Mesoamerican region. These results add to our understanding of the relationship between morphology, biogeography and habitat in a charismatic group of damselflies.},
keywords = {biogeography, mating behavior, wing coloration, Zygoptera},
pubstate = {published},
tppubtype = {article}
}
The damselflies Hetaerininae, a subfamily of Calopterygidae, comprise four genera distributed from North to South America: Hetaerina, Mnesarete, Ormenophlebia and Bryoplathanon. While several studies have focused on the intriguing behavioral and morphological modifications within Hetaerina, little of the evolutionary history of the group is well understood. Understanding the biogeographical history of Hetaerininae is further complicated by uncertainty in important geological events, such as the closure of the Central American Seaway (CAS). We generated a phylogenetic hypothesis to test the relationships and divergence times within Hetaerininae using IQtree and BEAST2 and found that Mnesarete and Ormenophlebia render Hetaerina paraphyletic. Reclassification of the genera within Hetaerininae is necessary based on our results. We also tested the fit to our dataset of two different hypotheses for the closure of CAS. Our results supported a gradual closure, starting in the Oligocene and ending in the Pliocene. Using Ancestral Character State Reconstruction, we found that the rubyspot, which is associated with higher fecundity in several species, was ancestral for Hetaerininae and subsequently lost four times. Estimates of diversification in association with the rubyspot are needed to understand the plasticity of this important character. Forest habitat was the ancestral state for Hetaerininae, with transitions to generalist species of Hetaerina found primarily in the Mesoamerican region. These results add to our understanding of the relationship between morphology, biogeography and habitat in a charismatic group of damselflies.
Benítez-Malvido, Julieta; Álvarez-Añorve, Mariana Y.; Ávila-Cabadilla, Luis D.; Pierro, Ana Ma González-Di; Zermeño-Hernández, Isela; Méndez-Toribio, Moisés; González-Rodríguez, Antonio; Lombera, Rafael
Phylogenetic and functional structure of tree communities at different life stages in tropical rain forest fragments Artículo de revista
En: Global Ecology and Conservation, vol. 36, 2022, ISSN: 23519894.
Resumen | Enlaces | Etiquetas: Fragmentation, Functional traits, Phylogenetic structure, Primates, Seed dispersal, Seed rain, Seedling bank, Tree species richness
@article{nokey,
title = {Phylogenetic and functional structure of tree communities at different life stages in tropical rain forest fragments},
author = {Julieta Benítez-Malvido and Mariana Y. Álvarez-Añorve and Luis D. Ávila-Cabadilla and Ana Ma González-Di Pierro and Isela Zermeño-Hernández and Moisés Méndez-Toribio and Antonio González-Rodríguez and Rafael Lombera},
doi = {10.1016/j.gecco.2022.e02113},
issn = {23519894},
year = {2022},
date = {2022-01-01},
journal = {Global Ecology and Conservation},
volume = {36},
publisher = {Elsevier B.V.},
abstract = {Tropical rain forest fragmentation is considered one of the principal drivers of biodiversity loss worldwide. Fragmentation and defaunation of tropical rain forests affect the maintenance of their biodiversity in a myriad of ways. Old-growth forest plant and animal species are more likely to suffer from local extinction, not only because fragments frequently represent low quality habitats but also because of the loss of biotic interactions such as seed dispersal. In this study, we evaluated the maintenance of tree species diversity in the face of habitat fragmentation in southern Mexico using different approaches. Firstly, we used community phylogeny at different tree life stages (i.e., seeds, seedlings and adults). Secondly, we categorised plant species in different life stages into functional groups according to seed size (small seeds < 1 cm length and large seeds > 1 cm length) and, finally, by dispersal syndrome (predominantly primate dispersed). We searched for three sites of continuous forest as experimental controls where two important seed dispersers coexist, the howler (Alouatta pigra) and spider (Ateles geoffroyi) monkeys, and six forest fragments of similar sizes (ca. 3–6 ha). Three fragments were occupied only by howler monkeys, and three had no primates. We compared entire assemblages as well as assemblages of small-seeded and large-seeded species separately to determine the phylogenetic structure and patterns of species richness and the density of adult trees (> 10 cm dbh), seedlings (10–100 cm tall) and seed assemblages. Fragments and continuous forest differed in taxonomic species richness and density at all life stages when large-seeded species mainly dispersed by primates were solely considered, with numbers in unoccupied fragments being consistently lower than in continuous forests and occupied fragments. Phylogenetic clustering occurred in all habitats and for all life stages, predominantly for the seedling stage, indicating that the understory community is assembled via environmental filtering (including both biotic and abiotic processes). Habitats occupied by primates tended to present a higher phylogenetic clustering than unoccupied fragments, suggesting that primates select phylogenetically-related species in their diets and, importantly, that these foraging behaviours influence seedling recruitment patterns. The loss of taxonomic and functional biodiversity and the non-random extinction of tree species principally dispersed by primates, represents part of the evolutionary history that is being lost throughout fragmentation.},
keywords = {Fragmentation, Functional traits, Phylogenetic structure, Primates, Seed dispersal, Seed rain, Seedling bank, Tree species richness},
pubstate = {published},
tppubtype = {article}
}
Tropical rain forest fragmentation is considered one of the principal drivers of biodiversity loss worldwide. Fragmentation and defaunation of tropical rain forests affect the maintenance of their biodiversity in a myriad of ways. Old-growth forest plant and animal species are more likely to suffer from local extinction, not only because fragments frequently represent low quality habitats but also because of the loss of biotic interactions such as seed dispersal. In this study, we evaluated the maintenance of tree species diversity in the face of habitat fragmentation in southern Mexico using different approaches. Firstly, we used community phylogeny at different tree life stages (i.e., seeds, seedlings and adults). Secondly, we categorised plant species in different life stages into functional groups according to seed size (small seeds < 1 cm length and large seeds > 1 cm length) and, finally, by dispersal syndrome (predominantly primate dispersed). We searched for three sites of continuous forest as experimental controls where two important seed dispersers coexist, the howler (Alouatta pigra) and spider (Ateles geoffroyi) monkeys, and six forest fragments of similar sizes (ca. 3–6 ha). Three fragments were occupied only by howler monkeys, and three had no primates. We compared entire assemblages as well as assemblages of small-seeded and large-seeded species separately to determine the phylogenetic structure and patterns of species richness and the density of adult trees (> 10 cm dbh), seedlings (10–100 cm tall) and seed assemblages. Fragments and continuous forest differed in taxonomic species richness and density at all life stages when large-seeded species mainly dispersed by primates were solely considered, with numbers in unoccupied fragments being consistently lower than in continuous forests and occupied fragments. Phylogenetic clustering occurred in all habitats and for all life stages, predominantly for the seedling stage, indicating that the understory community is assembled via environmental filtering (including both biotic and abiotic processes). Habitats occupied by primates tended to present a higher phylogenetic clustering than unoccupied fragments, suggesting that primates select phylogenetically-related species in their diets and, importantly, that these foraging behaviours influence seedling recruitment patterns. The loss of taxonomic and functional biodiversity and the non-random extinction of tree species principally dispersed by primates, represents part of the evolutionary history that is being lost throughout fragmentation.
Vega-Sánchez, Yesenia Margarita; Mendoza-Cuenca, Luis; González-Rodríguez, Antonio
Morphological variation and reproductive isolation in the Hetaerina americana species complex Artículo de revista
En: Scientific Reports, vol. 12, iss. 1, 2022, ISSN: 20452322.
Resumen | Enlaces | Etiquetas:
@article{nokey,
title = {Morphological variation and reproductive isolation in the Hetaerina americana species complex},
author = {Yesenia Margarita Vega-Sánchez and Luis Mendoza-Cuenca and Antonio González-Rodríguez},
doi = {10.1038/s41598-022-14866-8},
issn = {20452322},
year = {2022},
date = {2022-01-01},
journal = {Scientific Reports},
volume = {12},
issue = {1},
publisher = {Nature Research},
abstract = {Incomplete premating barriers in closely related species may result in reproductive interference. This process has different fitness consequences and can lead to three scenarios: niche segregation, sexual exclusion, or reproductive character displacement. In morphologically cryptic species, isolation barriers can be difficult to recognize. Here, we analyzed the morphological, behavioral, and genetic differences between two sympatric cryptic species of the genus Hetaerina to determine the characters that contribute the most to reproductive isolation and the effect of the high rates of behavior interference between the species. We found complete genetic isolation and significant differences in the morphometry of caudal appendages and wing shape, as well as body size variation between species. In contrast, we did not find clear differences in the coloration of the wing spot and observed high rates of interspecific aggression. Our results suggest that divergence in the shape of the caudal appendages is the principal pre-mating barrier that prevents interspecific mating. Moreover, a scenario of character displacement on body size was found. Nevertheless, size could play an important role in both inter- and intrasexual interactions and, therefore, we cannot differentiate if it has resulted from reproductive or aggressive interference.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Incomplete premating barriers in closely related species may result in reproductive interference. This process has different fitness consequences and can lead to three scenarios: niche segregation, sexual exclusion, or reproductive character displacement. In morphologically cryptic species, isolation barriers can be difficult to recognize. Here, we analyzed the morphological, behavioral, and genetic differences between two sympatric cryptic species of the genus Hetaerina to determine the characters that contribute the most to reproductive isolation and the effect of the high rates of behavior interference between the species. We found complete genetic isolation and significant differences in the morphometry of caudal appendages and wing shape, as well as body size variation between species. In contrast, we did not find clear differences in the coloration of the wing spot and observed high rates of interspecific aggression. Our results suggest that divergence in the shape of the caudal appendages is the principal pre-mating barrier that prevents interspecific mating. Moreover, a scenario of character displacement on body size was found. Nevertheless, size could play an important role in both inter- and intrasexual interactions and, therefore, we cannot differentiate if it has resulted from reproductive or aggressive interference.
Arima, Eugenio Y.; Denvir, Audrey; Young, Kenneth R.; González-Rodríguez, Antonio; García-Oliva, Felipe
Modelling avocado-driven deforestation in Michoacán, Mexico Artículo de revista
En: Environmental Research Letters, vol. 17, iss. 3, 2022, ISSN: 17489326.
Resumen | Enlaces | Etiquetas: climate change, commodities, land change modelling, land use change
@article{Arima2022,
title = {Modelling avocado-driven deforestation in Michoacán, Mexico},
author = {Eugenio Y. Arima and Audrey Denvir and Kenneth R. Young and Antonio González-Rodríguez and Felipe García-Oliva},
doi = {10.1088/1748-9326/ac5419},
issn = {17489326},
year = {2022},
date = {2022-01-01},
journal = {Environmental Research Letters},
volume = {17},
issue = {3},
publisher = {IOP Publishing Ltd},
abstract = {As demand for avocado climbs, avocado production in Michoacán - Mexico's biggest avocado growing region - expands into new places. We use a spatial probit model to project the geographic distribution of likely future avocado expansion and analyze those results to determine (a) threats to specific forest types and (b) how the distribution of avocado is shifting spatially under current and future climate scenarios. Our results suggest that avocado expansion in Michoacán is strongly driven by distance to existing agriculture, roads, and localities, as well as the dwindling availability of Andosol soils. As future expansion ensues, it presents risk of forest loss across various forest types, with pine-oak forest, mesophilic montane forest, and oyamel fir forest being of particular concern. Moreover, our results suggest that avocado production will occupy wider ranges in terms of temperature, precipitation, slope steepness and soil. The model predicts that climate change will alter the spatial distribution of avocado plantings, expanding into forest types at lower and at higher elevations. Forest loss threatens ecosystem degradation, and a wider avocado crop production footprint could lead to orchard establishment into dwindling forests that host a high diversity of native oaks and charismatic species, including the monarch butterfly.},
keywords = {climate change, commodities, land change modelling, land use change},
pubstate = {published},
tppubtype = {article}
}
As demand for avocado climbs, avocado production in Michoacán - Mexico's biggest avocado growing region - expands into new places. We use a spatial probit model to project the geographic distribution of likely future avocado expansion and analyze those results to determine (a) threats to specific forest types and (b) how the distribution of avocado is shifting spatially under current and future climate scenarios. Our results suggest that avocado expansion in Michoacán is strongly driven by distance to existing agriculture, roads, and localities, as well as the dwindling availability of Andosol soils. As future expansion ensues, it presents risk of forest loss across various forest types, with pine-oak forest, mesophilic montane forest, and oyamel fir forest being of particular concern. Moreover, our results suggest that avocado production will occupy wider ranges in terms of temperature, precipitation, slope steepness and soil. The model predicts that climate change will alter the spatial distribution of avocado plantings, expanding into forest types at lower and at higher elevations. Forest loss threatens ecosystem degradation, and a wider avocado crop production footprint could lead to orchard establishment into dwindling forests that host a high diversity of native oaks and charismatic species, including the monarch butterfly.
Hernández-Madrigal, Fátima; Contreras-Negrete, Gonzalo; Aguilar-Romero, Rafael; Pineda-García, Fernando; González-Rodríguez, Antonio
DIFFERENTIATION IN SEED MASS AND SEEDLING BIOMASS ALLOCATION IN PROSOPIS LAEVIGATA THROUGHOUT ITS DISTRIBUTION RANGE IN MEXICO IS ASSOCIATED TO WATER AVAILABILITY Artículo de revista
En: Botanical Sciences, vol. 100, iss. 2, pp. 274-290, 2022, ISSN: 20074476.
Resumen | Enlaces | Etiquetas: actual evapotranspiration, arid zones, Functional traits, germination
@article{nokey,
title = {DIFFERENTIATION IN SEED MASS AND SEEDLING BIOMASS ALLOCATION IN PROSOPIS LAEVIGATA THROUGHOUT ITS DISTRIBUTION RANGE IN MEXICO IS ASSOCIATED TO WATER AVAILABILITY},
author = {Fátima Hernández-Madrigal and Gonzalo Contreras-Negrete and Rafael Aguilar-Romero and Fernando Pineda-García and Antonio González-Rodríguez},
doi = {10.17129/botsci.2846},
issn = {20074476},
year = {2022},
date = {2022-01-01},
journal = {Botanical Sciences},
volume = {100},
issue = {2},
pages = {274-290},
publisher = {Sociedad Botanica de Mexico, A.C},
abstract = {Background: Seedling establishment depends on the quality of the seeds and environmental conditions. Differential biomass allocation in emergent seedlings probably constitutes a relevant adaptive response of populations along environmental gradients. Questions: Are there differences in seed mass and biomass allocation in seedlings among Prosopis laevigata populations? Is this variation correlated with environmental variables? Studied species: Prosopis laevigata (Humb. & Bonpl. ex Willd.) M.C.Johnst (Fabaceae). Study site and dates: Thirteen localities along the distribution of P. laevigata in México. From 2016 to 2020. Methods: Seeds were collected from four or five mother trees per locality. Seed mass (SM) was obtained in ten seeds per mother and six functional traits indicative of biomass allocation were measured in the seedlings after 10 days of germination. Population mean values were obtained for the six traits plus SM and subjected to a principal component analysis (PCA). Population scores on the first two axis of the PCA were regressed against environmental variables from the collection localities using a stepwise regression model. Results: Populations displayed functional variation congruent with alternative biomass allocation strategies. The conservative strategy was characterized by larger seeds and seedlings with denser tissues and a higher investment in root biomass, while the opposite characterized the acquisitive strategy. Actual evapotranspiration in May, isothermality and soil water content in February were environmental variables that significantly predicted population scores on the first two axes of the PCA. Conclusion: Water availability gradients influence seed mass and seedling biomass allocation variation among P. laevigata populations.},
keywords = {actual evapotranspiration, arid zones, Functional traits, germination},
pubstate = {published},
tppubtype = {article}
}
Background: Seedling establishment depends on the quality of the seeds and environmental conditions. Differential biomass allocation in emergent seedlings probably constitutes a relevant adaptive response of populations along environmental gradients. Questions: Are there differences in seed mass and biomass allocation in seedlings among Prosopis laevigata populations? Is this variation correlated with environmental variables? Studied species: Prosopis laevigata (Humb. & Bonpl. ex Willd.) M.C.Johnst (Fabaceae). Study site and dates: Thirteen localities along the distribution of P. laevigata in México. From 2016 to 2020. Methods: Seeds were collected from four or five mother trees per locality. Seed mass (SM) was obtained in ten seeds per mother and six functional traits indicative of biomass allocation were measured in the seedlings after 10 days of germination. Population mean values were obtained for the six traits plus SM and subjected to a principal component analysis (PCA). Population scores on the first two axis of the PCA were regressed against environmental variables from the collection localities using a stepwise regression model. Results: Populations displayed functional variation congruent with alternative biomass allocation strategies. The conservative strategy was characterized by larger seeds and seedlings with denser tissues and a higher investment in root biomass, while the opposite characterized the acquisitive strategy. Actual evapotranspiration in May, isothermality and soil water content in February were environmental variables that significantly predicted population scores on the first two axes of the PCA. Conclusion: Water availability gradients influence seed mass and seedling biomass allocation variation among P. laevigata populations.
Hernández-Leal, Mariana S.; Suárez-Atilano, Marco; Nicasio-Arzeta, Sergio; Piñero, Daniel; González-Rodríguez, Antonio
Landscape genetics of the tropical willow Salix humboldtiana: influence of climate, salinity, and orography in an altitudinal gradient Artículo de revista
En: American Journal of Botany, vol. 109, iss. 3, pp. 456-469, 2022, ISSN: 15372197.
Resumen | Enlaces | Etiquetas: DIGD hypothesis, gene flow, genetic structure, Mexico, resistance analysis, riparian tree, Salicaceae
@article{nokey,
title = {Landscape genetics of the tropical willow Salix humboldtiana: influence of climate, salinity, and orography in an altitudinal gradient},
author = {Mariana S. Hernández-Leal and Marco Suárez-Atilano and Sergio Nicasio-Arzeta and Daniel Piñero and Antonio González-Rodríguez},
doi = {10.1002/ajb2.1824},
issn = {15372197},
year = {2022},
date = {2022-01-01},
journal = {American Journal of Botany},
volume = {109},
issue = {3},
pages = {456-469},
publisher = {John Wiley and Sons Inc},
abstract = {Premise: Gene flow in riparian ecosystems is influenced by landscape features such as orography, climate, and salinity. The downstream increase in genetic diversity (DIGD) hypothesis states that the unidirectionality of the watercourse causes an accumulation of genetic diversity toward downstream populations, while upstream populations are more structured and less diverse, especially in water-dispersed organisms. Methods: We used chloroplast and nuclear microsatellites to characterize genetic diversity, structure, and gene flow patterns among populations of Salix humboldtiana across an elevation and salinity gradient on three rivers (Actopan, Antigua, and Blanco) in Mexico. We used optimization of resistance surface methods to determine whether genetic distances between populations are correlated with landscape features. Results: Positive FIS values evidenced biparental inbreeding in some populations, particularly at higher elevations where lower niche availability constrains colonization and persistence. Four genetic groups were distinguished, corresponding to populations on the Actopan and Antigua rivers and upstream and downstream on the Blanco, but with high admixture between populations on the Actopan and Antigua rivers. Higher gene flow rates were found among proximate populations on the same river than among different rivers. Genetic diversity increased toward the river mouths, in support of the DIGD hypothesis, probably due to greater niche availability and larger population size. Differences among rivers in precipitation patterns and salinity, as well as geographic distance, were significant predictors of gene flow. Conclusions: Our results depict that the DIGD and gene flow patterns in S. humboldtiana result from the complex interaction among physiography, climate, river salinity, and life-history traits of the species.},
keywords = {DIGD hypothesis, gene flow, genetic structure, Mexico, resistance analysis, riparian tree, Salicaceae},
pubstate = {published},
tppubtype = {article}
}
Premise: Gene flow in riparian ecosystems is influenced by landscape features such as orography, climate, and salinity. The downstream increase in genetic diversity (DIGD) hypothesis states that the unidirectionality of the watercourse causes an accumulation of genetic diversity toward downstream populations, while upstream populations are more structured and less diverse, especially in water-dispersed organisms. Methods: We used chloroplast and nuclear microsatellites to characterize genetic diversity, structure, and gene flow patterns among populations of Salix humboldtiana across an elevation and salinity gradient on three rivers (Actopan, Antigua, and Blanco) in Mexico. We used optimization of resistance surface methods to determine whether genetic distances between populations are correlated with landscape features. Results: Positive FIS values evidenced biparental inbreeding in some populations, particularly at higher elevations where lower niche availability constrains colonization and persistence. Four genetic groups were distinguished, corresponding to populations on the Actopan and Antigua rivers and upstream and downstream on the Blanco, but with high admixture between populations on the Actopan and Antigua rivers. Higher gene flow rates were found among proximate populations on the same river than among different rivers. Genetic diversity increased toward the river mouths, in support of the DIGD hypothesis, probably due to greater niche availability and larger population size. Differences among rivers in precipitation patterns and salinity, as well as geographic distance, were significant predictors of gene flow. Conclusions: Our results depict that the DIGD and gene flow patterns in S. humboldtiana result from the complex interaction among physiography, climate, river salinity, and life-history traits of the species.
Granados-Aguilar, Xochitl; Rosas, Ulises; González-Rodríguez, Antonio; Arias, Salvador
THE PRICKLY PROBLEM OF INTERWOVEN LINEAGES: HYBRIDIZATION PROCESSES IN CACTACEAE generic
2022.
Resumen | Enlaces | Etiquetas: Discordant phylogenies, natural hybridization, Opuntioideae, reticulate evolution, speciation
@generic{nokey,
title = {THE PRICKLY PROBLEM OF INTERWOVEN LINEAGES: HYBRIDIZATION PROCESSES IN CACTACEAE},
author = {Xochitl Granados-Aguilar and Ulises Rosas and Antonio González-Rodríguez and Salvador Arias},
doi = {10.17129/botsci.3065},
issn = {20074476},
year = {2022},
date = {2022-01-01},
journal = {Botanical Sciences},
volume = {100},
issue = {4},
pages = {797-813},
publisher = {Sociedad Botanica de Mexico, A.C},
abstract = {Background: Hybridization in nature occurs in numerous botanical families. In particular, the Cactaceae family contains lots of genera in which hybridization is reported. Questions: What are the patterns of reported natural hybridization in Cactaceae and their probable causes? Are there phylogenetic and evolutionary implications related to hybridization, particularly in Opuntioideae? Data description: A total of 62 articles about natural hybridization and classical Cactaceae literature were reviewed. Study site and dates: From 1900 to June 2021 Methods: A search for articles was performed in Web of Science and Google Scholar with the keywords “Cactaceae hybridization”, for time span “1900 to 2021” and included information from classic family-specific monographs. Results: Natural hybrids in Cactaceae occur in subfamilies, Cactoideae and Opuntioideae. There is evidence of nonselective mechanisms of reproductive isolation, but only for few taxa. For Cactoideae members the main approach used was morphological description, and the tribe with the highest number of natural hybrids was Trichocereeae. In Opuntioideae, the reviewed articles performed mostly chromosome counts, morphometric and phylogenetic analyses, and showed the highest number of natural hybrids. Conclusions: It has been suggested that hybridization impacts the evolution of Cactoideae and Opuntioideae, but few studies have formally tested this hypothesis. In Cactoideae, we found only descriptive evidences of hybridization; therefore, previous statements suggesting an important role of hybridization in the evolution of Cactoideae should be supported by performing formal analyses. For the postulation that hybridization impacts the evolution of Opuntioideae, we found formal evidence supporting hybridization hypothesis unlike what we found in Cactoideae.},
keywords = {Discordant phylogenies, natural hybridization, Opuntioideae, reticulate evolution, speciation},
pubstate = {published},
tppubtype = {generic}
}
Background: Hybridization in nature occurs in numerous botanical families. In particular, the Cactaceae family contains lots of genera in which hybridization is reported. Questions: What are the patterns of reported natural hybridization in Cactaceae and their probable causes? Are there phylogenetic and evolutionary implications related to hybridization, particularly in Opuntioideae? Data description: A total of 62 articles about natural hybridization and classical Cactaceae literature were reviewed. Study site and dates: From 1900 to June 2021 Methods: A search for articles was performed in Web of Science and Google Scholar with the keywords “Cactaceae hybridization”, for time span “1900 to 2021” and included information from classic family-specific monographs. Results: Natural hybrids in Cactaceae occur in subfamilies, Cactoideae and Opuntioideae. There is evidence of nonselective mechanisms of reproductive isolation, but only for few taxa. For Cactoideae members the main approach used was morphological description, and the tribe with the highest number of natural hybrids was Trichocereeae. In Opuntioideae, the reviewed articles performed mostly chromosome counts, morphometric and phylogenetic analyses, and showed the highest number of natural hybrids. Conclusions: It has been suggested that hybridization impacts the evolution of Cactoideae and Opuntioideae, but few studies have formally tested this hypothesis. In Cactoideae, we found only descriptive evidences of hybridization; therefore, previous statements suggesting an important role of hybridization in the evolution of Cactoideae should be supported by performing formal analyses. For the postulation that hybridization impacts the evolution of Opuntioideae, we found formal evidence supporting hybridization hypothesis unlike what we found in Cactoideae.
Rico, Leonardo Meza; Aguilar-Romero, Rafael; Paz, Horacio; Rodríguez-Correa, Hernando; González-Rodríguez, Antonio; Oyama, Ken; Pineda-Garcia, Fernando
Functional differentiation among Mexican oak species is guided by the fast–slow continuum but above and belowground resource use strategies are weakly coordinated Artículo de revista
En: Trees - Structure and Function, vol. 36, iss. 2, pp. 627-643, 2022, ISSN: 09311890.
Resumen | Enlaces | Etiquetas: Functional trade-offs, Quercus seedlings, Root depth, Root–shoot coordination
@article{Rico2022b,
title = {Functional differentiation among Mexican oak species is guided by the fast–slow continuum but above and belowground resource use strategies are weakly coordinated},
author = {Leonardo Meza Rico and Rafael Aguilar-Romero and Horacio Paz and Hernando Rodríguez-Correa and Antonio González-Rodríguez and Ken Oyama and Fernando Pineda-Garcia},
doi = {10.1007/s00468-021-02235-3},
issn = {09311890},
year = {2022},
date = {2022-01-01},
journal = {Trees - Structure and Function},
volume = {36},
issue = {2},
pages = {627-643},
publisher = {Springer Science and Business Media Deutschland GmbH},
abstract = {Key message: Oak species displayed high interspecific functional trait variation. The resource use strategy among oaks both at the above and belowground organs was guided by the fast-slow continuum. Abstract: Plant functional ecology has focused on the study of functional strategies and general patterns of trait covariation. Mostly, studies intend to elucidate how plants cope with resource capture both at the above and belowground organs and to understand how the capacity for resource gain relates with the species distribution. American oaks are an interesting and important tree clade, they radiated into diverse environments outside temperate regions implying the development of adaptations to persist under different environmental regimes. Therefore, we explored patterns of differentiation in functional traits related with the capacity for resource use in 3-month seedlings of ten Mexican oak species representative from semiarid, temperate and subtropical montane regions. We examined the fast–slow trade-off and its importance in species differentiation on both above and belowground organs. Additionally, we investigated how resource acquisition strategy of the species was related with the environmental conditions experienced in their habitats. We found a significant differentiation in both above and belowground traits, and in both cases oak species segregated along the fast–slow continuum. We found only a few significant trait-by-trait relationships, implying a weak coordination among aerial and subterranean organs. Additionally, species from sites with higher precipitation seasonality had a higher root growth, and species from humid sites had larger leaves. These findings highlight important functional variation among oak seedlings which was related with the climatic conditions encompassed along their native geographic range.},
keywords = {Functional trade-offs, Quercus seedlings, Root depth, Root–shoot coordination},
pubstate = {published},
tppubtype = {article}
}
Key message: Oak species displayed high interspecific functional trait variation. The resource use strategy among oaks both at the above and belowground organs was guided by the fast-slow continuum. Abstract: Plant functional ecology has focused on the study of functional strategies and general patterns of trait covariation. Mostly, studies intend to elucidate how plants cope with resource capture both at the above and belowground organs and to understand how the capacity for resource gain relates with the species distribution. American oaks are an interesting and important tree clade, they radiated into diverse environments outside temperate regions implying the development of adaptations to persist under different environmental regimes. Therefore, we explored patterns of differentiation in functional traits related with the capacity for resource use in 3-month seedlings of ten Mexican oak species representative from semiarid, temperate and subtropical montane regions. We examined the fast–slow trade-off and its importance in species differentiation on both above and belowground organs. Additionally, we investigated how resource acquisition strategy of the species was related with the environmental conditions experienced in their habitats. We found a significant differentiation in both above and belowground traits, and in both cases oak species segregated along the fast–slow continuum. We found only a few significant trait-by-trait relationships, implying a weak coordination among aerial and subterranean organs. Additionally, species from sites with higher precipitation seasonality had a higher root growth, and species from humid sites had larger leaves. These findings highlight important functional variation among oak seedlings which was related with the climatic conditions encompassed along their native geographic range.
2021
Contreras-Negrete, Gonzalo; Letelier, Luis; Piña-Torres, Javier; González-Rodríguez, Antonio
Genetic structure, phylogeography and potential distribution modeling suggest a population expansion in the mesquite Prosopis laevigata since the last interglacial Artículo de revista
En: Plant Systematics and Evolution, vol. 307, iss. 2, 2021, ISSN: 16156110.
Resumen | Enlaces | Etiquetas: arid zones, Phylogeography, Population expansion, Population genetics, Prosopis
@article{nokey,
title = {Genetic structure, phylogeography and potential distribution modeling suggest a population expansion in the mesquite Prosopis laevigata since the last interglacial},
author = {Gonzalo Contreras-Negrete and Luis Letelier and Javier Piña-Torres and Antonio González-Rodríguez},
doi = {10.1007/s00606-021-01744-5},
issn = {16156110},
year = {2021},
date = {2021-01-01},
journal = {Plant Systematics and Evolution},
volume = {307},
issue = {2},
publisher = {Springer},
abstract = {Patterns of genetic and phylogeographic structure and recent population history of plant species in the Mexican arid zones have been scarcely investigated. Prosopis laevigata is the most widely spread species of mesquite in Mexico, with extensive populations in the arid and semiarid zones of the central and northern plateaus and scattered presence in southern Mexico. We evaluated the genetic and phylogeographic structure of this species to infer its recent demographic history. We genotyped six nuclear microsatellite loci and sequenced the psbA3´-trnH chloroplast DNA (cpDNA) region in individuals from 21 populations covering the whole distribution of the species. Nuclear genetic diversity was moderately high (HE = 0.527), and genetic differentiation was moderate (FST = 0.16). A positive correlation between genetic diversity and latitude was observed. The cpDNA analyses indicated a lack of phylogeographic structure in P. laevigata (GST = 0.090},
keywords = {arid zones, Phylogeography, Population expansion, Population genetics, Prosopis},
pubstate = {published},
tppubtype = {article}
}
Patterns of genetic and phylogeographic structure and recent population history of plant species in the Mexican arid zones have been scarcely investigated. Prosopis laevigata is the most widely spread species of mesquite in Mexico, with extensive populations in the arid and semiarid zones of the central and northern plateaus and scattered presence in southern Mexico. We evaluated the genetic and phylogeographic structure of this species to infer its recent demographic history. We genotyped six nuclear microsatellite loci and sequenced the psbA3´-trnH chloroplast DNA (cpDNA) region in individuals from 21 populations covering the whole distribution of the species. Nuclear genetic diversity was moderately high (HE = 0.527), and genetic differentiation was moderate (FST = 0.16). A positive correlation between genetic diversity and latitude was observed. The cpDNA analyses indicated a lack of phylogeographic structure in P. laevigata (GST = 0.090
Contreras-Negrete, Gonzalo; Pineda-García, Fernando; Nicasio-Arzeta, Sergio; Barrera, Erick De; González-Rodríguez, Antonio
Differences in germination response to temperature, salinity, and water potential among Prosopis laevigata populations are guided by the tolerance-exploitation trade-off. Artículo de revista
En: Flora: Morphology, Distribution, Functional Ecology of Plants, vol. 285, 2021, ISSN: 03672530.
Resumen | Enlaces | Etiquetas: arid zones, Cardinal temperatures, Environmental gradients, Hydrotime, Local adaptation, Mesquite, Thermal time
@article{nokey,
title = {Differences in germination response to temperature, salinity, and water potential among Prosopis laevigata populations are guided by the tolerance-exploitation trade-off.},
author = {Gonzalo Contreras-Negrete and Fernando Pineda-García and Sergio Nicasio-Arzeta and Erick De Barrera and Antonio González-Rodríguez},
doi = {10.1016/j.flora.2021.151963},
issn = {03672530},
year = {2021},
date = {2021-01-01},
journal = {Flora: Morphology, Distribution, Functional Ecology of Plants},
volume = {285},
publisher = {Elsevier GmbH},
abstract = {Exploring the mechanisms that promote population divergence represents a central point in evolutionary ecology. Along their distribution, species commonly experience contrasting environmental conditions, which impose local selection pressures to which populations tend to adapt resulting, for example, in ways to deal with resource shortage or abundance. In this study, we explored if germination performance varies under different levels of temperature, water potential and salinity among populations of Prosopis laevigata, a widespread mesquite species from the arid and semi-arid zones of Mexico. Given the wide distribution of P. laevigata and the sensitivity of the germination phase to environmental conditions, we hypothesized the existence of differential responses during this crucial stage of plant development. Thus, we expected germination in populations of P. laevigata from more arid zones to be less sensitive to high temperatures, salinity, and water deficit. Also, we explored if the exploitation–tolerance trade-off guides the differentiation of P. laevigata populations in germination performance under varying conditions. Germination of all populations was very sensitive to water scarcity but not to variation in temperature or salinity. We identified two major axes of trait covariation in germination physiology: one defined by tolerance of germination to water and saline stress versus germination velocity, and the other defined by the tolerance to extreme temperatures. We found evidence that variation in tolerance among the populations was related with their distribution along environmental gradients. Overall, populations with a higher capacity to germinate under water deficit stress, salinity, and extreme temperatures inhabit warmer and more saline areas. Our study provides strong evidence of existing local adaptations during germination of P. laevigata from across its distribution in the arid lands of Mexico.},
keywords = {arid zones, Cardinal temperatures, Environmental gradients, Hydrotime, Local adaptation, Mesquite, Thermal time},
pubstate = {published},
tppubtype = {article}
}
Exploring the mechanisms that promote population divergence represents a central point in evolutionary ecology. Along their distribution, species commonly experience contrasting environmental conditions, which impose local selection pressures to which populations tend to adapt resulting, for example, in ways to deal with resource shortage or abundance. In this study, we explored if germination performance varies under different levels of temperature, water potential and salinity among populations of Prosopis laevigata, a widespread mesquite species from the arid and semi-arid zones of Mexico. Given the wide distribution of P. laevigata and the sensitivity of the germination phase to environmental conditions, we hypothesized the existence of differential responses during this crucial stage of plant development. Thus, we expected germination in populations of P. laevigata from more arid zones to be less sensitive to high temperatures, salinity, and water deficit. Also, we explored if the exploitation–tolerance trade-off guides the differentiation of P. laevigata populations in germination performance under varying conditions. Germination of all populations was very sensitive to water scarcity but not to variation in temperature or salinity. We identified two major axes of trait covariation in germination physiology: one defined by tolerance of germination to water and saline stress versus germination velocity, and the other defined by the tolerance to extreme temperatures. We found evidence that variation in tolerance among the populations was related with their distribution along environmental gradients. Overall, populations with a higher capacity to germinate under water deficit stress, salinity, and extreme temperatures inhabit warmer and more saline areas. Our study provides strong evidence of existing local adaptations during germination of P. laevigata from across its distribution in the arid lands of Mexico.
Vaca-Sánchez, Marcela Sofía; González-Rodríguez, Antonio; Maldonado-López, Yurixhi; Oyama, Ken; Faria, Maurício Lopes; Fagundes, Marcílio; Cuevas-Reyes, Pablo
Genetic and functional leaf traits variability of Quercus laurina along an oak diversity gradient in Mexico Artículo de revista
En: European Journal of Forest Research, vol. 140, iss. 5, pp. 1211-1225, 2021, ISSN: 16124677.
Resumen | Enlaces | Etiquetas: Functional plant traits, Genetic diversity, Oak species richness, Q. laurina
@article{nokey,
title = {Genetic and functional leaf traits variability of Quercus laurina along an oak diversity gradient in Mexico},
author = {Marcela Sofía Vaca-Sánchez and Antonio González-Rodríguez and Yurixhi Maldonado-López and Ken Oyama and Maurício Lopes Faria and Marcílio Fagundes and Pablo Cuevas-Reyes},
doi = {10.1007/s10342-021-01401-z},
issn = {16124677},
year = {2021},
date = {2021-01-01},
journal = {European Journal of Forest Research},
volume = {140},
issue = {5},
pages = {1211-1225},
publisher = {Springer Science and Business Media Deutschland GmbH},
abstract = {The ecological literature has documented the effects of plant hybridization on phenotypic variation, and dominant, intermediate, or novel morphological, chemical and physiological traits in hybrids. It is important to understand the ecological consequences of hybridization by evaluating their impact on phenotypic expression of functional traits. We evaluated the relationship between genetic diversity of Quercus laurina and functional foliar traits along an oak diversity gradient. We selected five study sites that represent an oak diversity gradient where Q. laurina is present. Using chloroplast and nuclear microsatellites, we evaluated genetic diversity, measured functional foliar traits of Q. laurina in each site and assessed the effects of local climate variables on the oak community and functional traits. We found a greater abundance of Q. laurina in all study sites. We did not find a relationship between the number of accompanying red oak species and the population genetic diversity in Q. laurina, but higher genetic diversity was found in all study sites in comparison with European oak species. Sites with more oak species had more variation of foliar functional traits. Our results do not support the hypothesis that predicts higher levels of genetic diversity of Q. laurina in communities with greater oak diversity from the same section, but we demonstrated an increase in the foliar functional traits of Q. laurina associated with oak richness and climate variables. We highlight the need to consider environmental and ecological variables linkages as regulatory mechanisms of the phenotypic plasticity expressed in changes of some functional attributes of oaks.},
keywords = {Functional plant traits, Genetic diversity, Oak species richness, Q. laurina},
pubstate = {published},
tppubtype = {article}
}
The ecological literature has documented the effects of plant hybridization on phenotypic variation, and dominant, intermediate, or novel morphological, chemical and physiological traits in hybrids. It is important to understand the ecological consequences of hybridization by evaluating their impact on phenotypic expression of functional traits. We evaluated the relationship between genetic diversity of Quercus laurina and functional foliar traits along an oak diversity gradient. We selected five study sites that represent an oak diversity gradient where Q. laurina is present. Using chloroplast and nuclear microsatellites, we evaluated genetic diversity, measured functional foliar traits of Q. laurina in each site and assessed the effects of local climate variables on the oak community and functional traits. We found a greater abundance of Q. laurina in all study sites. We did not find a relationship between the number of accompanying red oak species and the population genetic diversity in Q. laurina, but higher genetic diversity was found in all study sites in comparison with European oak species. Sites with more oak species had more variation of foliar functional traits. Our results do not support the hypothesis that predicts higher levels of genetic diversity of Q. laurina in communities with greater oak diversity from the same section, but we demonstrated an increase in the foliar functional traits of Q. laurina associated with oak richness and climate variables. We highlight the need to consider environmental and ecological variables linkages as regulatory mechanisms of the phenotypic plasticity expressed in changes of some functional attributes of oaks.
Cárdenas-Alvarado, María Angeles; Nava, Héctor; González-Rodríguez, Antonio; Maldonado-López, Yurixhi; Rodríguez-Lanetty, Mauricio
En: Marine Ecology, vol. 42, iss. 4, 2021, ISSN: 14390485.
Resumen | Enlaces | Etiquetas: 28S, El Niño, Genetic diversity, ITS2, Pocillopora verrucosa, zooxanthellae
@article{nokey,
title = {Higher population genetic diversity within the algal symbiont Durusdinium in Pocillopora verrucosa from Mexican Pacific reefs correlates with higher resistance to bleaching after the El Niño 2015–16 event},
author = {María Angeles Cárdenas-Alvarado and Héctor Nava and Antonio González-Rodríguez and Yurixhi Maldonado-López and Mauricio Rodríguez-Lanetty},
doi = {10.1111/maec.12667},
issn = {14390485},
year = {2021},
date = {2021-01-01},
journal = {Marine Ecology},
volume = {42},
issue = {4},
publisher = {John Wiley and Sons Inc},
abstract = {Zooxanthellae are dinoflagellate algae belonging to the family Symbiodiniaceae that provide energy and oxygenation to corals, allowing them to develop a high calcification rate. Additionally, some species of these algal symbionts seem to be related to coral resistance to particular environmental conditions, and such responses have a high potential to cope with climate change and related phenomena. In this study, we examined the role of algal symbiont diversity in the resistance of corals to thermal stress along four coral reefs from the Mexican Pacific after the “El Niño” event of 2015–16. To assess the composition and genetic diversity of the populations of zooxanthellae, the 28S and ITS2 nrRNA genes were amplified and sequenced from a total of 102 fragments of Pocillopora verrucosa. The resulting phylogenetic trees of both molecular markers showed that all sequences were grouped within clade D corresponding to genus Durusdinium, closely related to the subtypes D1.1 and D1.2, respectively. The presence of this genus has been related to the ability of coral hosts to endure thermal stress. Analysis of haplotype networks showed a higher number of haplotypes for the ITS2 in comparison with the 28S marker, with 28 and 5 haplotypes, respectively. With the ITS2 marker, the haplotypes from Islote Zacatoso were differentiated with more mutational steps, showing the highest genetic diversity. This population was associated with corals that suffered a minimum coral bleaching during the El Niño event of 2015–16. Moreover, the population of Playa Las Gatas had the lowest genetic diversity in the area and showed the highest incidence of coral mortality and bleaching. In this way, we discuss the possible relationship between both local and external environmental conditions and current composition of zooxanthellae as modulators of the response of corals to thermal stress: higher genetic diversity of zooxanthellae seems to be related to high resistance to thermal stress.},
keywords = {28S, El Niño, Genetic diversity, ITS2, Pocillopora verrucosa, zooxanthellae},
pubstate = {published},
tppubtype = {article}
}
Zooxanthellae are dinoflagellate algae belonging to the family Symbiodiniaceae that provide energy and oxygenation to corals, allowing them to develop a high calcification rate. Additionally, some species of these algal symbionts seem to be related to coral resistance to particular environmental conditions, and such responses have a high potential to cope with climate change and related phenomena. In this study, we examined the role of algal symbiont diversity in the resistance of corals to thermal stress along four coral reefs from the Mexican Pacific after the “El Niño” event of 2015–16. To assess the composition and genetic diversity of the populations of zooxanthellae, the 28S and ITS2 nrRNA genes were amplified and sequenced from a total of 102 fragments of Pocillopora verrucosa. The resulting phylogenetic trees of both molecular markers showed that all sequences were grouped within clade D corresponding to genus Durusdinium, closely related to the subtypes D1.1 and D1.2, respectively. The presence of this genus has been related to the ability of coral hosts to endure thermal stress. Analysis of haplotype networks showed a higher number of haplotypes for the ITS2 in comparison with the 28S marker, with 28 and 5 haplotypes, respectively. With the ITS2 marker, the haplotypes from Islote Zacatoso were differentiated with more mutational steps, showing the highest genetic diversity. This population was associated with corals that suffered a minimum coral bleaching during the El Niño event of 2015–16. Moreover, the population of Playa Las Gatas had the lowest genetic diversity in the area and showed the highest incidence of coral mortality and bleaching. In this way, we discuss the possible relationship between both local and external environmental conditions and current composition of zooxanthellae as modulators of the response of corals to thermal stress: higher genetic diversity of zooxanthellae seems to be related to high resistance to thermal stress.
Vaca-Sánchez, Marcela Sofía; Maldonado-López, Yurixhi; González-Rodríguez, Antonio; Oyama, Ken; Fernandes, G. Wilson; Fagundes, Marcílio; López-Barbosa, Edmundo Carlos; Aguilar-Peralta, Joan Sebastian; Cuevas-Reyes, Pablo
Canopy arthropod diversity associated with Quercus laurina: importance of an oak species diversity gradient on abundance, species richness and guild composition Artículo de revista
En: Journal of Insect Conservation, vol. 25, iss. 5-6, pp. 859-874, 2021, ISSN: 15729753.
Resumen | Enlaces | Etiquetas: Biotic interactions, Bottom-up effects, Canopy arthropods, Oak diversity, Top-down effects
@article{nokey,
title = {Canopy arthropod diversity associated with Quercus laurina: importance of an oak species diversity gradient on abundance, species richness and guild composition},
author = {Marcela Sofía Vaca-Sánchez and Yurixhi Maldonado-López and Antonio González-Rodríguez and Ken Oyama and G. Wilson Fernandes and Marcílio Fagundes and Edmundo Carlos López-Barbosa and Joan Sebastian Aguilar-Peralta and Pablo Cuevas-Reyes},
doi = {10.1007/s10841-021-00352-5},
issn = {15729753},
year = {2021},
date = {2021-01-01},
journal = {Journal of Insect Conservation},
volume = {25},
issue = {5-6},
pages = {859-874},
publisher = {Springer Science and Business Media Deutschland GmbH},
abstract = {Abstract: Central-west and south of Mexico are particularly rich in oak species, coexisting from two to six species and generating gradients of oak diversity that could potentially affect community structure of canopy arthropods. We evaluated changes in canopy arthropod diversity of the Quercus laurina along a gradient of oak diversity in the central-west portion of the Trans-Mexican Volcanic Belt. Five study sites that represent an oak diversity gradient and, where Q. laurina is also widespread were selected. At each site, five mature trees of Q. laurina were randomly selected to collect canopy arthropods using fogging techniques. We assessed the effects of local climate variables on the oak community and the canopy arthropod diversity. We collected 7479 arthropods representing 1154 morphospecies grouped into 15 different orders. Differences in arthropod diversity, abundance and guild composition between oak communities were detected. The general pattern showed a highest richness and abundance of arthropods in Tequila volcano, which represented the site with the greatest diversity of oaks. A significant positive relationship between arthropod abundance and oak species diversity was found. Arthropod guild composition differed along the gradient of oak diversity. Local environmental variables were related with oak community, but did not explained canopy arthropod diversity. At the local scale, plant species richness is the main factor that determines the canopy arthropod abundance and richness of Q. laurina, affecting the structure and composition of arthropod guilds. We highlight the importance of conserving oak species because they represent key elements of temperate forest that harbor high arthropod diversity. Implications for insect conservation: Our findings confirm that at the local scale, plant species richness is the main factor that determines the arthropod diversity associated with the canopy of Quercus laurina, affecting trophic levels and the composition of arthropod guilds. Therefore, the oak species diversity in temperate forests is a key factor to harbor and preserving the diversity of canopy arthropods in temperate ecosystems.},
keywords = {Biotic interactions, Bottom-up effects, Canopy arthropods, Oak diversity, Top-down effects},
pubstate = {published},
tppubtype = {article}
}
Abstract: Central-west and south of Mexico are particularly rich in oak species, coexisting from two to six species and generating gradients of oak diversity that could potentially affect community structure of canopy arthropods. We evaluated changes in canopy arthropod diversity of the Quercus laurina along a gradient of oak diversity in the central-west portion of the Trans-Mexican Volcanic Belt. Five study sites that represent an oak diversity gradient and, where Q. laurina is also widespread were selected. At each site, five mature trees of Q. laurina were randomly selected to collect canopy arthropods using fogging techniques. We assessed the effects of local climate variables on the oak community and the canopy arthropod diversity. We collected 7479 arthropods representing 1154 morphospecies grouped into 15 different orders. Differences in arthropod diversity, abundance and guild composition between oak communities were detected. The general pattern showed a highest richness and abundance of arthropods in Tequila volcano, which represented the site with the greatest diversity of oaks. A significant positive relationship between arthropod abundance and oak species diversity was found. Arthropod guild composition differed along the gradient of oak diversity. Local environmental variables were related with oak community, but did not explained canopy arthropod diversity. At the local scale, plant species richness is the main factor that determines the canopy arthropod abundance and richness of Q. laurina, affecting the structure and composition of arthropod guilds. We highlight the importance of conserving oak species because they represent key elements of temperate forest that harbor high arthropod diversity. Implications for insect conservation: Our findings confirm that at the local scale, plant species richness is the main factor that determines the arthropod diversity associated with the canopy of Quercus laurina, affecting trophic levels and the composition of arthropod guilds. Therefore, the oak species diversity in temperate forests is a key factor to harbor and preserving the diversity of canopy arthropods in temperate ecosystems.
Zorrilla-Azcué, Sofía; González-Rodríguez, Antonio; Oyama, Ken; González, Mailyn A.; Rodríguez-Correa, Hernando
The DNA history of a lonely oak: Quercus humboldtii phylogeography in the Colombian Andes Artículo de revista
En: Ecology and Evolution, vol. 11, iss. 11, pp. 6814-6828, 2021, ISSN: 20457758.
Resumen | Enlaces | Etiquetas: genetic diversity and structure, historical connectivity, historical demography, Neotropical trees, Oaks, Phylogeography, Pleistocene, Quercus
@article{nokey,
title = {The DNA history of a lonely oak: Quercus humboldtii phylogeography in the Colombian Andes},
author = {Sofía Zorrilla-Azcué and Antonio González-Rodríguez and Ken Oyama and Mailyn A. González and Hernando Rodríguez-Correa},
doi = {10.1002/ece3.7529},
issn = {20457758},
year = {2021},
date = {2021-01-01},
journal = {Ecology and Evolution},
volume = {11},
issue = {11},
pages = {6814-6828},
publisher = {John Wiley and Sons Ltd},
abstract = {The climatic and geological changes that occurred during the Quaternary, particularly the fluctuations during the glacial and interglacial periods of the Pleistocene, shaped the population demography and geographic distribution of many species. These processes have been studied in several groups of organisms in the Northern Hemisphere, but their influence on the evolution of Neotropical montane species and ecosystems remains unclear. This study contributes to the understanding of the effect of climatic fluctuations during the late Pleistocene on the evolution of Andean mountain forests. First, we describe the nuclear and plastidic DNA patterns of genetic diversity, structure, historical demography, and landscape connectivity of Quercus humboldtii, which is a typical species in northern Andean montane forests. Then, these patterns were compared with the palynological and evolutionary hypotheses postulated for montane forests of the Colombian Andes under climatic fluctuation scenarios during the Quaternary. Our results indicated that populations of Q. humboldtii have high genetic diversity and a lack of genetic structure and that they have experienced a historical increase in connectivity from the last glacial maximum (LGM) to the present. Furthermore, our results showed a dramatic reduction in the effective population size followed by an expansion before the LGM, which is consistent with the results found by palynological studies, suggesting a change in dominance in Andean forests that may be related to ecological factors rather than climate change.},
keywords = {genetic diversity and structure, historical connectivity, historical demography, Neotropical trees, Oaks, Phylogeography, Pleistocene, Quercus},
pubstate = {published},
tppubtype = {article}
}
The climatic and geological changes that occurred during the Quaternary, particularly the fluctuations during the glacial and interglacial periods of the Pleistocene, shaped the population demography and geographic distribution of many species. These processes have been studied in several groups of organisms in the Northern Hemisphere, but their influence on the evolution of Neotropical montane species and ecosystems remains unclear. This study contributes to the understanding of the effect of climatic fluctuations during the late Pleistocene on the evolution of Andean mountain forests. First, we describe the nuclear and plastidic DNA patterns of genetic diversity, structure, historical demography, and landscape connectivity of Quercus humboldtii, which is a typical species in northern Andean montane forests. Then, these patterns were compared with the palynological and evolutionary hypotheses postulated for montane forests of the Colombian Andes under climatic fluctuation scenarios during the Quaternary. Our results indicated that populations of Q. humboldtii have high genetic diversity and a lack of genetic structure and that they have experienced a historical increase in connectivity from the last glacial maximum (LGM) to the present. Furthermore, our results showed a dramatic reduction in the effective population size followed by an expansion before the LGM, which is consistent with the results found by palynological studies, suggesting a change in dominance in Andean forests that may be related to ecological factors rather than climate change.
López-Barrera, Gabriela; Ochoa-Zavala, Maried; Quesada, Mauricio; Harvey, Nick; Núñez-Farfán, Juan; González-Rodríguez, Antonio; Rocha-Ramírez, Víctor; Oyama, Ken
Genetic imprints of Brosimum alicastrum Sw. in Mexico Artículo de revista
En: American Journal of Botany, vol. 108, iss. 9, pp. 1793-1807, 2021, ISSN: 15372197.
Resumen | Enlaces | Etiquetas: Brosimum alicastrum, Genetic diversity, geographical barriers, lowland tropical trees, Mexico, Moraceae, population genetic structure
@article{nokey,
title = {Genetic imprints of Brosimum alicastrum Sw. in Mexico},
author = {Gabriela López-Barrera and Maried Ochoa-Zavala and Mauricio Quesada and Nick Harvey and Juan Núñez-Farfán and Antonio González-Rodríguez and Víctor Rocha-Ramírez and Ken Oyama},
doi = {10.1002/ajb2.1725},
issn = {15372197},
year = {2021},
date = {2021-01-01},
journal = {American Journal of Botany},
volume = {108},
issue = {9},
pages = {1793-1807},
publisher = {John Wiley and Sons Inc},
abstract = {Premise: The mechanisms generating the geographical distributions of genetic diversity are a central theme in evolutionary biology. The amount of genetic diversity and its distribution are controlled by several factors, including dispersal abilities, physical barriers, and environmental and climatic changes. We investigated the patterns of genetic diversity and differentiation among populations of the widespread species Brosimum alicastrum in Mexico. Methods: Using nuclear DNA microsatellite data, we tested whether the genetic structure of B. alicastrum was associated with the roles of the Trans-Mexican Volcanic Belt and the Isthmus of Tehuantepec as geographical barriers to gene flow and to infer the role of past events in the genetic diversity patterns. We further used a maximum-likelihood population-effects mixed model (MLPE) to identify the main factor affecting population differentiation in B. alicastrum. Results: Our results suggested that Mexican B. alicastrum is well differentiated into three main lineages. Patterns of the genetic structure at a finer scale did not fully correspond to the current geographical barriers to gene flow. According to the MLPE mixed model, isolation by distance is the best model for explaining the genetic differentiation of B. alicastrum in Mexico. Conclusions: We propose that the differentiation patterns might reflect (1) an ancient differentiation that occurred in Central and South America, (2) the effects of past climatic changes, and (3) the functions of some physical barriers to gene flow. This study provides insights into the possible mechanisms underlying the geographic genetic variation of B. alicastrum along a moisture gradient in tropical lowland forests.},
keywords = {Brosimum alicastrum, Genetic diversity, geographical barriers, lowland tropical trees, Mexico, Moraceae, population genetic structure},
pubstate = {published},
tppubtype = {article}
}
Premise: The mechanisms generating the geographical distributions of genetic diversity are a central theme in evolutionary biology. The amount of genetic diversity and its distribution are controlled by several factors, including dispersal abilities, physical barriers, and environmental and climatic changes. We investigated the patterns of genetic diversity and differentiation among populations of the widespread species Brosimum alicastrum in Mexico. Methods: Using nuclear DNA microsatellite data, we tested whether the genetic structure of B. alicastrum was associated with the roles of the Trans-Mexican Volcanic Belt and the Isthmus of Tehuantepec as geographical barriers to gene flow and to infer the role of past events in the genetic diversity patterns. We further used a maximum-likelihood population-effects mixed model (MLPE) to identify the main factor affecting population differentiation in B. alicastrum. Results: Our results suggested that Mexican B. alicastrum is well differentiated into three main lineages. Patterns of the genetic structure at a finer scale did not fully correspond to the current geographical barriers to gene flow. According to the MLPE mixed model, isolation by distance is the best model for explaining the genetic differentiation of B. alicastrum in Mexico. Conclusions: We propose that the differentiation patterns might reflect (1) an ancient differentiation that occurred in Central and South America, (2) the effects of past climatic changes, and (3) the functions of some physical barriers to gene flow. This study provides insights into the possible mechanisms underlying the geographic genetic variation of B. alicastrum along a moisture gradient in tropical lowland forests.
Laikre, Linda; Hohenlohe, Paul A.; Allendorf, Fred W.; Bertola, Laura D.; Breed, Martin F.; Bruford, Michael W.; Funk, W. Chris; Gajardo, Gonzalo; González-Rodríguez, Antonio; Grueber, Catherine E.; Hedrick, Philip W.; Heuertz, Myriam; Hunter, Margaret E.; Johannesson, Kerstin; Liggins, Libby; MacDonald, Anna J.; Mergeay, Joachim; Moharrek, Farideh; O’Brien, David; Ogden, Rob; Orozco-terWengel, Pablo; Palma-Silva, Clarisse; Pierson, Jennifer; Paz-Vinas, Ivan; Russo, Isa Rita M.; Ryman, Nils; Segelbacher, Gernot; Sjögren-Gulve, Per; Waits, Lisette P.; Vernesi, Cristiano; Hoban, Sean
Authors’ Reply to Letter to the Editor: Continued improvement to genetic diversity indicator for CBD generic
2021.
Enlaces | Etiquetas:
@generic{Laikre2021b,
title = {Authors’ Reply to Letter to the Editor: Continued improvement to genetic diversity indicator for CBD},
author = {Linda Laikre and Paul A. Hohenlohe and Fred W. Allendorf and Laura D. Bertola and Martin F. Breed and Michael W. Bruford and W. Chris Funk and Gonzalo Gajardo and Antonio González-Rodríguez and Catherine E. Grueber and Philip W. Hedrick and Myriam Heuertz and Margaret E. Hunter and Kerstin Johannesson and Libby Liggins and Anna J. MacDonald and Joachim Mergeay and Farideh Moharrek and David O’Brien and Rob Ogden and Pablo Orozco-terWengel and Clarisse Palma-Silva and Jennifer Pierson and Ivan Paz-Vinas and Isa Rita M. Russo and Nils Ryman and Gernot Segelbacher and Per Sjögren-Gulve and Lisette P. Waits and Cristiano Vernesi and Sean Hoban},
doi = {10.1007/s10592-021-01359-w},
issn = {15729737},
year = {2021},
date = {2021-01-01},
journal = {Conservation Genetics},
volume = {22},
issue = {4},
pages = {533-536},
publisher = {Springer Science and Business Media B.V.},
keywords = {},
pubstate = {published},
tppubtype = {generic}
}
Contreras-Negrete, Gonzalo; Letelier, Luis; Piña-Torres, Javier; González-Rodríguez, Antonio
Genetic structure, phylogeography and potential distribution modeling suggest a population expansion in the mesquite Prosopis laevigata since the last interglacial Artículo de revista
En: Plant Systematics and Evolution, vol. 307, iss. 2, 2021, ISSN: 16156110.
Resumen | Enlaces | Etiquetas: arid zones, Phylogeography, Population expansion, Population genetics, Prosopis
@article{nokey,
title = {Genetic structure, phylogeography and potential distribution modeling suggest a population expansion in the mesquite Prosopis laevigata since the last interglacial},
author = {Gonzalo Contreras-Negrete and Luis Letelier and Javier Piña-Torres and Antonio González-Rodríguez},
doi = {10.1007/s00606-021-01744-5},
issn = {16156110},
year = {2021},
date = {2021-01-01},
journal = {Plant Systematics and Evolution},
volume = {307},
issue = {2},
publisher = {Springer},
abstract = {Patterns of genetic and phylogeographic structure and recent population history of plant species in the Mexican arid zones have been scarcely investigated. Prosopis laevigata is the most widely spread species of mesquite in Mexico, with extensive populations in the arid and semiarid zones of the central and northern plateaus and scattered presence in southern Mexico. We evaluated the genetic and phylogeographic structure of this species to infer its recent demographic history. We genotyped six nuclear microsatellite loci and sequenced the psbA3´-trnH chloroplast DNA (cpDNA) region in individuals from 21 populations covering the whole distribution of the species. Nuclear genetic diversity was moderately high (HE = 0.527), and genetic differentiation was moderate (FST = 0.16). A positive correlation between genetic diversity and latitude was observed. The cpDNA analyses indicated a lack of phylogeographic structure in P. laevigata (GST = 0.090},
keywords = {arid zones, Phylogeography, Population expansion, Population genetics, Prosopis},
pubstate = {published},
tppubtype = {article}
}
Patterns of genetic and phylogeographic structure and recent population history of plant species in the Mexican arid zones have been scarcely investigated. Prosopis laevigata is the most widely spread species of mesquite in Mexico, with extensive populations in the arid and semiarid zones of the central and northern plateaus and scattered presence in southern Mexico. We evaluated the genetic and phylogeographic structure of this species to infer its recent demographic history. We genotyped six nuclear microsatellite loci and sequenced the psbA3´-trnH chloroplast DNA (cpDNA) region in individuals from 21 populations covering the whole distribution of the species. Nuclear genetic diversity was moderately high (HE = 0.527), and genetic differentiation was moderate (FST = 0.16). A positive correlation between genetic diversity and latitude was observed. The cpDNA analyses indicated a lack of phylogeographic structure in P. laevigata (GST = 0.090
Melecio, Eduardo Quintero; Rico, Yessica; Noriega, Andrés Lira; Rodríguez, Antonio González
Molecular evidence and ecological niche modeling reveal an extensive hybrid zone among three Bursera species (section Bullockia) Artículo de revista
En: PLoS ONE, vol. 16, iss. 11 November, 2021, ISSN: 19326203.
Resumen | Enlaces | Etiquetas:
@article{Melecio2021,
title = {Molecular evidence and ecological niche modeling reveal an extensive hybrid zone among three Bursera species (section Bullockia)},
author = {Eduardo Quintero Melecio and Yessica Rico and Andrés Lira Noriega and Antonio González Rodríguez},
doi = {10.1371/journal.pone.0260382},
issn = {19326203},
year = {2021},
date = {2021-01-01},
journal = {PLoS ONE},
volume = {16},
issue = {11 November},
publisher = {Public Library of Science},
abstract = {The genus Bursera, includes ~100 shrub and trees species in tropical dry forests with its center of diversification and endemism in Mexico. Morphologically intermediate individuals have commonly been observed in Mexican Bursera in areas where closely related species coexist. These individuals are assumed to result from interspecific hybridization, but no molecular evidence has supported their hybrid origins. This study aimed to investigate the existence of interspecific hybridization among three Mexican Bursera species (Bullockia section: B. cuneata, B. palmeri and B. bipinnata) from nine populations based on DNA sequences (three nuclear and four chloroplast regions) and ecological niche modeling for three past and two future scenario projections. Results from the only two polymorphic nuclear regions (PEPC, ETS) supported the hybrid origin of morphologically intermediate individuals and revealed that B. cuneata and B. bipinnata are the parental species that are genetically closer to the putative hybrids. Ecological niche modeling accurately predicted the occurrence of putative hybrid populations and showed a potential hybrid zone extending in a larger area (74,000 km2) than previously thought. Paleo-reconstructions showed a potential hybrid zone existing from the Last Glacial Maximum (~ 21 kya) that has increased since the late Holocene to the present. Future ecological niche projections show an increment of suitability of the potential hybrid zone for 2050 and 2070 relative to the present. Hybrid zone changes responded mostly to an increase in elevational ranges. Our study provides the first insight of an extensive hybrid zone among three Mexican Bursera species based on molecular data and ecological niche modeling.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The genus Bursera, includes ~100 shrub and trees species in tropical dry forests with its center of diversification and endemism in Mexico. Morphologically intermediate individuals have commonly been observed in Mexican Bursera in areas where closely related species coexist. These individuals are assumed to result from interspecific hybridization, but no molecular evidence has supported their hybrid origins. This study aimed to investigate the existence of interspecific hybridization among three Mexican Bursera species (Bullockia section: B. cuneata, B. palmeri and B. bipinnata) from nine populations based on DNA sequences (three nuclear and four chloroplast regions) and ecological niche modeling for three past and two future scenario projections. Results from the only two polymorphic nuclear regions (PEPC, ETS) supported the hybrid origin of morphologically intermediate individuals and revealed that B. cuneata and B. bipinnata are the parental species that are genetically closer to the putative hybrids. Ecological niche modeling accurately predicted the occurrence of putative hybrid populations and showed a potential hybrid zone extending in a larger area (74,000 km2) than previously thought. Paleo-reconstructions showed a potential hybrid zone existing from the Last Glacial Maximum (~ 21 kya) that has increased since the late Holocene to the present. Future ecological niche projections show an increment of suitability of the potential hybrid zone for 2050 and 2070 relative to the present. Hybrid zone changes responded mostly to an increase in elevational ranges. Our study provides the first insight of an extensive hybrid zone among three Mexican Bursera species based on molecular data and ecological niche modeling.
2020
Hernández-Esquivel, Karen Beatriz; Piedra-Malagón, Eva María; Cornejo-Tenorio, Guadalupe; Mendoza-Cuenca, Luis; González-Rodríguez, Antonio; Ruiz-Sanchez, Eduardo; Ibarra-Manríquez, Guillermo
Unraveling the extreme morphological variation in the neotropical Ficus aurea complex (subg. Spherosuke, sect. Americanae, Moraceae) Artículo de revista
En: Journal of Systematics and Evolution, vol. 58, iss. 3, pp. 263-281, 2020, ISSN: 17596831.
Resumen | Enlaces | Etiquetas: geometric morphometrics, integrative taxonomy, leaf shape, plant populations, syconium
@article{nokey,
title = {Unraveling the extreme morphological variation in the neotropical Ficus aurea complex (subg. Spherosuke, sect. Americanae, Moraceae)},
author = {Karen Beatriz Hernández-Esquivel and Eva María Piedra-Malagón and Guadalupe Cornejo-Tenorio and Luis Mendoza-Cuenca and Antonio González-Rodríguez and Eduardo Ruiz-Sanchez and Guillermo Ibarra-Manríquez},
doi = {10.1111/jse.12564},
issn = {17596831},
year = {2020},
date = {2020-01-01},
journal = {Journal of Systematics and Evolution},
volume = {58},
issue = {3},
pages = {263-281},
publisher = {Wiley-Liss Inc.},
abstract = {Ficus (Moraceae) is one of the most diverse genera of tree species in the world. The subgenus Spherosuke, section Americanae, comprises several species complexes because its diagnostic structures are extremely variable. Currently, neither there is a phylogenetic hypothesis that can help solve the delimitation problems within these complexes nor has an integrative taxonomic approach been developed. In the present study, morphometric methods were applied to solve the taxonomic problems in the Ficus aurea complex. Morphometric variation of syconia and leaves was analyzed to find differences between four previously recognized forms (fo. aurea, fo. cookii, fo. isophlebia, and fo. tuerckheimii). Syconium characters were analyzed using traditional morphometrics, while leaf shape was evaluated with geometric morphometrics, encompassing 20 populations along two-thirds of the distribution range of the complex. Data sets from syconia and leaves were tested for possible associations with geographic and rainfall variables. There are significant differences between the four forms in syconium characters and leaf shape. Geography and rainfall variables show significant covariation related to the morphometric variation of syconia but not to leaf shape. Consequently, we propose that the four forms should be repositioned into the specific rank. Besides, F. tecolutensis is also recognized as a separated species from form aurea considering Principal Component Analysis, field observations, and herbarium specimens. An identification key, descriptions, as well as taxonomic comments of the species are provided.},
keywords = {geometric morphometrics, integrative taxonomy, leaf shape, plant populations, syconium},
pubstate = {published},
tppubtype = {article}
}
Ficus (Moraceae) is one of the most diverse genera of tree species in the world. The subgenus Spherosuke, section Americanae, comprises several species complexes because its diagnostic structures are extremely variable. Currently, neither there is a phylogenetic hypothesis that can help solve the delimitation problems within these complexes nor has an integrative taxonomic approach been developed. In the present study, morphometric methods were applied to solve the taxonomic problems in the Ficus aurea complex. Morphometric variation of syconia and leaves was analyzed to find differences between four previously recognized forms (fo. aurea, fo. cookii, fo. isophlebia, and fo. tuerckheimii). Syconium characters were analyzed using traditional morphometrics, while leaf shape was evaluated with geometric morphometrics, encompassing 20 populations along two-thirds of the distribution range of the complex. Data sets from syconia and leaves were tested for possible associations with geographic and rainfall variables. There are significant differences between the four forms in syconium characters and leaf shape. Geography and rainfall variables show significant covariation related to the morphometric variation of syconia but not to leaf shape. Consequently, we propose that the four forms should be repositioned into the specific rank. Besides, F. tecolutensis is also recognized as a separated species from form aurea considering Principal Component Analysis, field observations, and herbarium specimens. An identification key, descriptions, as well as taxonomic comments of the species are provided.
Chincoya, Delil A.; Sanchez-Flores, Alejandro; Estrada, Karel; Díaz-Velásquez, Clara E.; González-Rodríguez, Antonio; Vaca-Paniagua, Felipe; Dávila, Patricia; Arias, Salvador; Solórzano, Sofía
Identification of high molecular variation loci in complete chloroplast genomes of mammillaria (Cactaceae, caryophyllales) Artículo de revista
En: Genes, vol. 11, iss. 7, pp. 1-11, 2020, ISSN: 20734425.
Resumen | Enlaces | Etiquetas: Locus, Mammillaria, Molecular variation, Non-coding regions, Repeated sequences, SSRs
@article{Chincoya2020,
title = {Identification of high molecular variation loci in complete chloroplast genomes of mammillaria (Cactaceae, caryophyllales)},
author = {Delil A. Chincoya and Alejandro Sanchez-Flores and Karel Estrada and Clara E. Díaz-Velásquez and Antonio González-Rodríguez and Felipe Vaca-Paniagua and Patricia Dávila and Salvador Arias and Sofía Solórzano},
doi = {10.3390/genes11070830},
issn = {20734425},
year = {2020},
date = {2020-01-01},
journal = {Genes},
volume = {11},
issue = {7},
pages = {1-11},
publisher = {MDPI AG},
abstract = {In plants, partial DNA sequences of chloroplasts have been widely used in evolutionary studies. However, the Cactaceae family (1500–1800 species) lacks molecular markers that allow a phylogenetic resolution between species and genera. In order to identify sequences with high variation levels, we compared previously reported complete chloroplast genomes of seven species of Mammillaria. We identified repeated sequences (RSs) and two types of DNA variation: short sequence repeats (SSRs) and divergent homologous loci. The species with the highest number of RSs was M. solisioides (256), whereas M. pectinifera contained the highest amount of SSRs (84). In contrast, M. zephyranthoides contained the lowest number (35) of both RSs and SSRs. In addition, five of the SSRs were found in the seven species, but only three of them showed variation. A total of 180 homologous loci were identified among the seven species. Out of these, 20 loci showed a molecular variation of 5% to 31%, and 12 had a length within the range of 150 to 1000 bp. We conclude that the high levels of variation at the reported loci represent valuable knowledge that may help to resolve phylogenetic relationships and that may potentially be convenient as molecular markers for population genetics and phylogeographic studies.},
keywords = {Locus, Mammillaria, Molecular variation, Non-coding regions, Repeated sequences, SSRs},
pubstate = {published},
tppubtype = {article}
}
In plants, partial DNA sequences of chloroplasts have been widely used in evolutionary studies. However, the Cactaceae family (1500–1800 species) lacks molecular markers that allow a phylogenetic resolution between species and genera. In order to identify sequences with high variation levels, we compared previously reported complete chloroplast genomes of seven species of Mammillaria. We identified repeated sequences (RSs) and two types of DNA variation: short sequence repeats (SSRs) and divergent homologous loci. The species with the highest number of RSs was M. solisioides (256), whereas M. pectinifera contained the highest amount of SSRs (84). In contrast, M. zephyranthoides contained the lowest number (35) of both RSs and SSRs. In addition, five of the SSRs were found in the seven species, but only three of them showed variation. A total of 180 homologous loci were identified among the seven species. Out of these, 20 loci showed a molecular variation of 5% to 31%, and 12 had a length within the range of 150 to 1000 bp. We conclude that the high levels of variation at the reported loci represent valuable knowledge that may help to resolve phylogenetic relationships and that may potentially be convenient as molecular markers for population genetics and phylogeographic studies.
Hernández, Dainiz Hernández; Larsen, John; González-Rodríguez, Antonio; Tapia-Torres, Yunuen; Barrera, Erick; Eguiarte, Luis E.; García-Oliva, Felipe
Cooperation between Sporobolus airoides and associated arbuscular mycorrhizal fungi for phosphorus acquisition under drought conditions in an oligotrophic desert ecosystem Artículo de revista
En: Rhizosphere, vol. 15, 2020, ISSN: 24522198.
Resumen | Enlaces | Etiquetas: Arbuscular mycorrhiza, Cuatro ciénegas, Nutrient stoichiometric homeostasis, Rhizosphere, Sporobolus airoides
@article{nokey,
title = {Cooperation between Sporobolus airoides and associated arbuscular mycorrhizal fungi for phosphorus acquisition under drought conditions in an oligotrophic desert ecosystem},
author = {Dainiz Hernández Hernández and John Larsen and Antonio González-Rodríguez and Yunuen Tapia-Torres and Erick Barrera and Luis E. Eguiarte and Felipe García-Oliva},
doi = {10.1016/j.rhisph.2020.100225},
issn = {24522198},
year = {2020},
date = {2020-01-01},
journal = {Rhizosphere},
volume = {15},
publisher = {Elsevier B.V.},
abstract = {Plants from phosphorus (P) limited environments have developed various strategies for acquiring P from the soil, and for maintaining P homeostasis within the plant. We analyzed the mechanisms of phosphorus acquisition used by the grass Sporobolus airoides-rhizosphere microbiota during two years with contrasting annual rainfall in an extreme P-oligotrophic ecosystem. We determined arbuscular mycorrhizal fungi (AMF) root and soil colonization, and the activity of three P-related eco-enzymes over two consecutive years. We also determined C, N, and P concentrations and ratios in plant biomass, microbial biomass and soil for assessing nutrient homeostasis of soil microbial community and plants. S. airoides invested more carbon in the AMF symbiosis in the drought year in the site more limited by P (Pozas Azules site). Additionally, the specific activity of phosphomonoesterases was higher in this site, suggesting that the microbial community invests more energy to produce this enzyme to release P from organic molecules. In conclusion, our results show evidence of the importance of AMF symbiosis for S. airoides to cope with P and water limitations in a highly oligotrophic ecosystem.},
keywords = {Arbuscular mycorrhiza, Cuatro ciénegas, Nutrient stoichiometric homeostasis, Rhizosphere, Sporobolus airoides},
pubstate = {published},
tppubtype = {article}
}
Plants from phosphorus (P) limited environments have developed various strategies for acquiring P from the soil, and for maintaining P homeostasis within the plant. We analyzed the mechanisms of phosphorus acquisition used by the grass Sporobolus airoides-rhizosphere microbiota during two years with contrasting annual rainfall in an extreme P-oligotrophic ecosystem. We determined arbuscular mycorrhizal fungi (AMF) root and soil colonization, and the activity of three P-related eco-enzymes over two consecutive years. We also determined C, N, and P concentrations and ratios in plant biomass, microbial biomass and soil for assessing nutrient homeostasis of soil microbial community and plants. S. airoides invested more carbon in the AMF symbiosis in the drought year in the site more limited by P (Pozas Azules site). Additionally, the specific activity of phosphomonoesterases was higher in this site, suggesting that the microbial community invests more energy to produce this enzyme to release P from organic molecules. In conclusion, our results show evidence of the importance of AMF symbiosis for S. airoides to cope with P and water limitations in a highly oligotrophic ecosystem.