Publicaciones

@article{nokey,

title = {High genetic diversity and stable Pleistocene distributional ranges in the widespread Mexican red oak Quercus castanea Née (1801) (Fagaceae)},

author = {Juan Manuel Peñaloza-Ramírez and Hernando Rodríguez-Correa and Antonio González-Rodríguez and Víctor Rocha-Ramírez and Ken Oyama},

doi = {10.1002/ece3.6189},

issn = {20457758},

year  = {2020},

date = {2020-01-01},

journal = {Ecology and Evolution},

volume = {10},

issue = {10},

pages = {4204-4219},

publisher = {John Wiley and Sons Ltd},

abstract = {The Mexican highlands are areas of high biological complexity where taxa of Nearctic and Neotropical origin and different population histories are found. To gain a more detailed view of the evolution of the biota in these regions, it is necessary to evaluate the effects of historical tectonic and climate events on species. Here, we analyzed the phylogeographic structure, historical demographic processes, and the contemporary period, Last Glacial Maximum (LGM) and Last Interglacial (LIG) ecological niche models of Quercus castanea, to infer the historical population dynamics of this oak distributed in the Mexican highlands. A total of 36 populations of Q. castanea were genotyped with seven chloroplast microsatellite loci in four recognized biogeographic provinces of Mexico: the Sierra Madre Occidental (western mountain range), the Central Plateau, the Trans-Mexican Volcanic Belt (TMVB, mountain range crossing central Mexico from west to east) and the Sierra Madre del Sur (SMS, southern mountain range). We obtained standard statistics of genetic diversity and structure and tested for signals of historical demographic expansions. A total of 90 haplotypes were identified, and 29 of these haplotypes were restricted to single populations. The within-population genetic diversity was high (mean hS = 0.72), and among-population genetic differentiation showed a strong phylogeographic structure (NST = 0.630 > GST = 0.266; p <.001). Signals of demographic expansion were identified in the TMVB and the SMS. The ecological niche models suggested a considerable percentage of stable distribution area for the species during the LGM and connectivity between the TMVB and the SMS. High genetic diversity, strong phylogeographic structure, and ecological niche models suggest in situ permanence of Q. castanea populations with large effective population sizes. The complex geological and climatic histories of the TMVB help to explain the origin and maintenance of a large proportion of the genetic diversity in this oak species.},

keywords = {genetic variation, historical demography, Mexican Highlands, Neotropical trees, Oaks, Phylogeography},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Association of functional trait variation of Quercus castanea with temperature and water availability gradients at the landscape level},

author = {Libny Ingrid Lara-De La Cruz and Felipe García-Oliva and Ken Oyama and Antonio González-Rodríguez},

doi = {10.17129/BOTSCI.2449},

issn = {20074476},

year  = {2020},

date = {2020-01-01},

journal = {Botanical Sciences},

volume = {98},

issue = {1},

pages = {16-27},

publisher = {Sociedad Botanica de Mexico, A.C},

abstract = {Background: Phenotypic variability of tree species is often associated to environmental factors. Quercus castanea is a Mexican red oak with a wide geographical and altitudinal distribution along contrasting environments. It is the most abundant oak species in the Cuitzeo basin, which is characterized by highly heterogeneous environmental conditions. Hypothesis: We hypothesized that gradients in temperature, precipitation and soil characteristics across the distribution of Q. castanea within the Cuitzeo basin promote variability in functional traits related to the adjustment to differential water availability at a landscape level. Studied species: Quercus castanea Née (Fagaceae). Study site and years of study: Cuitzeo basin in Central Mexico. 2015-2016. Methods: We quantified leaf chlorophyll concentration (CC), leaf area (LA), leaf thickness (LT), leaf mass per area (LMA) and the Huber value (HV) in 10 individuals from 22 populations of Q. castanea throughout the basin. Results: Despite the relatively small geographical area (4,000 km2), our results revealed significant differentiation among populations in the studied functional traits. The strongest variation found was in LT, which was negatively correlated with precipitation seasonality. This pattern is opposite to previous reports on Mediterranean oaks but similar to tropical oaks and suggests that the combination with other traits such as leaf phenology is important in the response to water availability. Conclusions: Significant functional differences exist among populations of Q. castanea separated by a few kilometers in the heterogenous landscape of the Cuitzeo basin. This species shows clearly sclerophyllous leaves, but leaf thickness varies to a considerable degree across populations.},

keywords = {Climate gradient, Leaf economic spectrum, Plant morpho-physiological variation, Quercus},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Seasonal variation in native hydraulic conductivity between two deciduous oak species},

author = {Dilia Mota-Gutiérrez and Guadalupe Arreola-González and Rafael Aguilar-Romero and Horacio Paz and Jeannine Cavender-Bares and Ken Oyama and Antonio Gonzalez-Rodriguez and Fernando Pineda-García},

doi = {10.1093/JPE/RTZ051},

issn = {1752993X},

year  = {2020},

date = {2020-01-01},

journal = {Journal of Plant Ecology},

volume = {13},

issue = {1},

pages = {78-86},

publisher = {Oxford University Press},

abstract = {Aims Mechanisms of plant drought resistance include both tolerance and avoidance. Xylem vulnerability to embolism and turgor loss point are considered traits that confer tolerance, while leaf abscission and deciduousness characterizes the avoidance strategy. While these mechanisms are thought to trade-off expressing a continuum among species, little is known on how variation in the timing and duration of leaf shedding in response to drought affect the relationship between xylem and leaf tolerance. In the present study, we explored the extent to which drought tolerance differs between two oak (Quercus) species that exhibit different leaf shedding behaviours. Particularly, we predicted that Q. deserticola Trel., which loses leaves at the end of the dry season (late-deciduous) and is thus exposed to a greater risk of cavitation, would be more drought tolerant and more conservative in its water use than Q. laeta Liebm., which loses its leaves for only a short period of time in the middle of the dry season (brevideciduous). Methods The study was conducted in central Mexico in a single population of each of the two oak species, separated from each other by a distance of 1.58 km, and by an altitudinal difference of 191 m. Quercus deserticola (late deciduous) is more frequent down slope, while Q. laeta (brevideciduous) tends to occur at higher elevations along the gradient. We assessed seasonal differences (rainy versus dry season) in native stem hydraulic conductivity, and tested for variation in xylem vulnerability to cavitation, leaf water use and leaf turgor loss point between the two species. Important Findings The two oak species did not differ in traits conferring drought tolerance, including xylem vulnerability to embolism, leaf turgor loss point, or stomatal conductance. However, both species had different performance during the dry season; the brevideciduous species had lower negative impact in the xylem function than the late-deciduous species. Overall, seasonal changes in plant physiological performance between the two oak species were determined by a reduction in the canopy leaf area.},

keywords = {Embolisms, Hydraulic conductivity, Leaf phenology, Quercus},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Hetaerina calverti (Odonata: Zygoptera: Calopterygidae) sp. nov., a new cryptic species of the American Rubyspot complex},

author = {Yesenia Margarita Vega-Sánchez and Luis Felipe Mendoza-Cuenca and Antonio Gonzálezrodríguez},

doi = {10.11646/zootaxa.4766.3.7},

issn = {11755334},

year  = {2020},

date = {2020-01-01},

journal = {Zootaxa},

volume = {4766},

issue = {3},

pages = {485-497},

publisher = {Magnolia Press},

abstract = {Hetaerina americana Fabricius, 1798 has a long and irresolute taxonomic history. Several synonyms have been suggested (H. californica Hagen in Selys-Longchamps, 1859, H. basalis Hagen in Selys-Longchamps, 1859, H. texana Walsh, 1863, H. scelerata Walsh, 1863, etc.), related to the variation in the size of the wing spots as well as to the morphology of the male cerci. However, Calvert (1901) suggested that H. americana represents one variable species. Nevertheless, Vega-Sánchez et al. (2019) through a genetic and morphological analysis presented evidence to propose that H. americana represents a species complex. In the present work, we describe a new species that belongs to this complex: H. calverti sp. nov. The morphological characteristics by which males and females of H. calverti differ from H. americana are highlighted. The most important character for the differentiation of males is the shape of the cerci and the size of the individuals (when the two species are in sympatry). In females, the main differences are in the shape of the intersternites and the medio-dorsal carina of the last segment of the abdomen. Some generalities about the biology of the species are presented, including geographical distribution patterns and genetic divergence data.},

keywords = {Damselfly, Genetic divergence, Hetaerina americana, Morphological differentiation},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {De novo assembly discovered novel structures in genome of plastids and revealed divergent inverted repeats in mammillaria (Cactaceae, caryophyllales)},

author = {Sofía Solórzano and 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},

doi = {10.3390/plants8100392},

issn = {22237747},

year  = {2019},

date = {2019-01-01},

journal = {Plants},

volume = {8},

issue = {10},

publisher = {MDPI AG},

abstract = {The complete sequence of chloroplast genome (cpDNA) has been documented for single large columnar species of Cactaceae, lacking inverted repeats (IRs). We sequenced cpDNA for seven species of the short-globose cacti of Mammillaria and de novo assembly revealed three novel structures in land plants. These structures have a large single copy (LSC) that is 2.5 to 10 times larger than the small single copy (SSC), and two IRs that contain strong differences in length and gene composition. Structure 1 is distinguished by short IRs of <1 kb composed by rpl23-trnI-CAU-ycf2; with a total length of 110,189 bp and 113 genes. In structure 2, each IR is approximately 7.2 kb and is composed of 11 genes and one Intergenic Spacer-(psbK-trnQ)-trnQUUG- rps16-trnK-UUU-matK-trnK-UUU-psbA-trnH-GUG-rpl2-rpl23-trnI-CAU-ycf2; with a total size of 116,175 bp and 120 genes. Structure 3 has divergent IRs of approximately 14.1 kb, where IRA is composed of 20 genes: PsbA-trnH-GUG-rpl23-trnI-CAU-ycf2-ndhB-rps7-rps12-trnV-GAC-rrn16-ycf68-trnI-GAU-trnA-AGC-rrn23- rrn4.5-rrn5-trnR-ACG-trnN-GUU-ndhF-rpl32; and IRB is identical to the IRA, but lacks rpl23. This structure has 131 genes and, by pseudogenization, it is shown to have the shortest cpDNA, of just 107,343 bp. Our findings show that Mammillaria bears an unusual structural diversity of cpDNA, which supports the elucidation of the evolutionary processes involved in cacti lineages.},

keywords = {Divergent inverted repeats, Novel gene rearrangements, Pseudogenization, Short-globose cacti},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Regional patterns of genetic structure and environmental differentiation in willow populations (Salix humboldtiana Willd.) from Central Mexico},

author = {Mariana S. Hernández-Leal and Marco Suárez-Atilano and Daniel Piñero and Antonio González-Rodríguez},

doi = {10.1002/ece3.5475},

issn = {20457758},

year  = {2019},

date = {2019-01-01},

journal = {Ecology and Evolution},

volume = {9},

issue = {17},

pages = {9564-9579},

publisher = {John Wiley and Sons Ltd},

abstract = {Aim: To infer the geological and climatic factors that have shaped the genetic diversity and structure of a willow species (Salix humboldtiana) in three basins of Central Mexico. Location: Central Mexico. Methods: We collected samples from 11 populations across two hydrological basins (Balsas and Lerma) and one population from another basin (Ameca) within the Mexican Central Plateau (MCP). Individuals were analyzed using sequences of two chloroplast DNA (cpDNA) regions and eight nuclear simple sequence repeats (nSSR). Population genetic diversity and structure were determined from these data. To evaluate whether genetic structure was associated with ecological niche differentiation, we determined whether there is niche equivalence, overlap, or divergence between the Balsas and Lerma basins. Also, we evaluated the relative contributions of geographic distribution and climatic variation on population genetic structuring through redundancy analysis (RDA) and partial RDA. Results: Both cpDNA and nSSRs data indicated the presence of three highly differentiated genetic groups, mostly geographically congruent with the three main hydrological basins. According to nSSRs, the three genetic groups can be further subdivided into eight subgroups corresponding to different rivers within the main basins. The niche equivalency test showed that the niches of the species in the Balsas and Lerma basins are significantly nonequivalent. The RDA indicated a significant association of genetic variation among populations with climate variables (particularly those related to the precipitation regime), while controlling for geographic distribution. Main conclusions: The genetic structure of S. humboldtiana is strongly associated with the historical and current geological configuration of the basins and the rivers within basins. The observed hierarchical genetic differentiation can be due to gene flow limitation resulting from physical barriers to the dispersal of S. humboldtiana, but also to some degree of isolation by environment, as suggested by the significant association between genetic variation among populations and precipitation regime.},

keywords = {ecological niche modeling, Genetic diversity, genetic structure, niche divergence, riparian ecosystem},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {The role of pollination effectiveness on the attributes of interaction networks: from floral visitation to plant fitness},

author = {Martín H. Santiago-Hernández and Silvana Martén-Rodríguez and Martha Lopezaraiza-Mikel and Ken Oyama and Antonio González-Rodríguez and Mauricio Quesada},

doi = {10.1002/ecy.2803},

issn = {00129658},

year  = {2019},

date = {2019-01-01},

journal = {Ecology},

volume = {100},

issue = {10},

publisher = {Ecological Society of America},

abstract = {Network analysis is a powerful tool to understand community-level plant–pollinator interactions. We evaluated the role of floral visitors on plant fitness through a series of pollination exclusion experiments to test the effectiveness of pollinators of an Ipomoea community in the Pacific coast of Mexico, including: (1) all flower visitors, (2) visitors that contact the reproductive organs, (3) visitors that deposit pollen on stigmas, and (4) visitors that mediate fruit and seed production. Our results show that networks built from effective pollination interactions are smaller, less connected, more specialized and modular than floral visitor networks. Modules are associated with pollinator functional groups and they provide strong support for pollination syndromes only when non-effective interactions are excluded. In contrast to other studies, the analyzed networks are not nested. Our results also show that only 59% of floral visitors were legitimate pollinators that contribute to seed production. Furthermore, only 27% of the links in visitation network resulted in seed production. Our study shows that plant-pollination networks that consider effectiveness measures of pollination in addition to floral visitation provide insightful information about the different role floral visitors play in a community, encompassing a large number of commensalistic/antagonistic interactions and the more restricted set of mutualistic relationships that underlie the evolution of convergent floral phenotypes in plants.},

keywords = {effective pollinators, floral visitors, fruit set, phenology, plant fitness, pollen count, pollination networks, pollination syndromes, seed set},

pubstate = {published},

tppubtype = {article}

}

@article{Vega-Sanchez2019,

title = {Complex evolutionary history of the American Rubyspot damselfly, Hetaerina americana (Odonata): Evidence of cryptic speciation},

author = {Yesenia Margarita Vega-Sánchez and Luis Felipe Mendoza-Cuenca and Antonio González-Rodríguez},

url = {https://doi.org/10.1016/j.ympev.2019.106536},

doi = {10.1016/j.ympev.2019.106536},

issn = {10959513},

year  = {2019},

date = {2019-01-01},

journal = {Molecular Phylogenetics and Evolution},

volume = {139},

issue = {March},

pages = {106536},

publisher = {Elsevier},

abstract = {Analyzing the magnitude and distribution of genetic variation within and among populations allows for hypothesis testing about historical demographic size changes, secondary contacts, refugia, and speciation patterns. Species distribution and genetic structure are greatly influenced by the complex life cycle and behavior of odonates. Hetaerina americana has been widely used as a model system in behavioral studies, but its population genetic structure has not been analyzed, except for a single study that included only three populations but identified the presence of markedly differentiated genetic groups, suggesting the existence of cryptic species. Here, we tested this hypothesis by assessing throughout the distribution range of H. americana the patterns of genetic and morphological variation in the male caudal appendages, due to the great importance of these structures in mate recognition. As molecular markers we used sequences of the mitochondrial cytochrome oxidase I (COI) gene and the nuclear internal transcribed spacer (ITS) region, as well as six nuclear microsatellites. We found very high population genetic differentiation (ΦST > 0.51) in the three sets of markers but with strong mitonuclear discordance. A neutrality test suggested that the mitochondrial genome might be under purifying selection in association to climatic variables (temperature seasonality). The assignment of individuals to nuclear genetic groups showed little admixture and complete congruence with morphological differentiation in the male caudal appendages. Hence, the results suggest that H. americana represents at least two different cryptic species which are isolated reproductively.},

keywords = {Calopterygidae, Caudal appendages, Genetic divergence, Mitonuclear discordance, nonecological speciation, Reproductive isolation},

pubstate = {published},

tppubtype = {article}

}

@article{Gonzalez-Esquivel2019,

title = {Functional attributes of two Croton species in different successional stages of tropical dry forest: effects on herbivory and fluctuating asymmetry patterns},

author = {José Gerardo González-Esquivel and Pablo Cuevas-Reyes and Antonio González-Rodríguez and Luis Daniel Ávila-Cabadilla and Mariana Yolotl Álvarez-Añorve and Marcilio Fagundes and Yurixhi Maldonado-López},

doi = {10.1007/s42965-019-00027-y},

issn = {26618982},

year  = {2019},

date = {2019-01-01},

journal = {Tropical Ecology},

volume = {60},

issue = {2},

pages = {238-251},

abstract = {Tropical dry forests are among the most threatened ecosystems in the world. After habitat perturbation occurs, the habitat recovers naturally through ecological succession. This succession can modify functional attributes of plants, which in turn, can affect herbivorous insects’ performance. We analyzed morphological, functional, and chemical traits associated with herbivory patterns in Croton roxanae and C. suberosus, that occur in mature and secondary forests in the tropical dry forest of Chamela, Jalisco. Leaf area and leaf thickness were higher in secondary forest, while leaf density and fresh leaf mass were higher in mature forest. Dry leaf mass, specific leaf area, chlorophyll content, and water content showed variation between species in both forest conditions. The concentration of secondary metabolites showed variation between species and forest conditions. Croton roxanae showed higher herbivory in mature forest, and C. suberosus did not show differences between the two conditions. Leaves in secondary forest were slightly longer and broader than leaves in mature forest. Croton species showed higher fluctuating asymmetry in secondary forest. Herbivory was not associated with levels of fluctuating asymmetry levels in both Croton species. Our results suggest that plant attributes are influenced by forest condition, which in turn, indirectly affect the attack of herbivores.},

keywords = {Alkaloids, Chemical defense, Herbivores, land use change, Morphological variation, Phenols, Succession},

pubstate = {published},

tppubtype = {article}

}

@article{Hipp2019,

title = {Genomic landscape of the global oak phylogeny},

author = {Andrew L. Hipp and Paul S. Manos and Marlene Hahn and Michael Avishai and Cathérine Bodénès and Jeannine Cavender-Bares and Andrew A. Crowl and Min Deng and Thomas Denk and Sorel Fitz-Gibbon and Oliver Gailing and M. Socorro González-Elizondo and Antonio González-Rodríguez and Guido W. Grimm and Xiao Long Jiang and Antoine Kremer and Isabelle Lesur and John D. McVay and Christophe Plomion and Hernando Rodríguez-Correa and Ernst Detlef Schulze and Marco C. Simeone and Victoria L. Sork and Susana Valencia-Avalos},

doi = {10.1111/nph.16162},

issn = {14698137},

year  = {2019},

date = {2019-01-01},

journal = {New Phytologist},

abstract = {The tree of life is highly reticulate, with the history of population divergence emerging from populations of gene phylogenies that reflect histories of introgression, lineage sorting and divergence. In this study, we investigate global patterns of oak diversity and test the hypothesis that there are regions of the oak genome that are broadly informative about phylogeny. We utilize fossil data and restriction-site associated DNA sequencing (RAD-seq) for 632 individuals representing nearly 250 Quercus species to infer a time-calibrated phylogeny of the world's oaks. We use a reversible-jump Markov chain Monte Carlo method to reconstruct shifts in lineage diversification rates, accounting for among-clade sampling biases. We then map the > 20 000 RAD-seq loci back to an annotated oak genome and investigate genomic distribution of introgression and phylogenetic support across the phylogeny. Oak lineages have diversified among geographic regions, followed by ecological divergence within regions, in the Americas and Eurasia. Roughly 60% of oak diversity traces back to four clades that experienced increases in net diversification, probably in response to climatic transitions or ecological opportunity. The strong support for the phylogeny contrasts with high genomic heterogeneity in phylogenetic signal and introgression. Oaks are phylogenomic mosaics, and their diversity may in fact depend on the gene flow that shapes the oak genome.},

keywords = {diversification rates, genomic mosaicism, introgression, Oaks, phylogenomics, Quercus, restriction-site associated DNA sequencing (RAD-se, tree diversity},

pubstate = {published},

tppubtype = {article}

}

@article{Cortes-Flores2019,

title = {Phylogeny, fruit traits, and ecological correlates of fruiting phenology in a Neotropical dry forest},

author = {Jorge Cortés-Flores and Guadalupe Cornejo-Tenorio and Lina Adonay Urrea-Galeano and Ellen Andresen and Antonio González-Rodríguez and Guillermo Ibarra-Manríquez},

url = {https://doi.org/10.1007/s00442-018-4295-z},

doi = {10.1007/s00442-018-4295-z},

issn = {00298549},

year  = {2019},

date = {2019-01-01},

journal = {Oecologia},

volume = {189},

issue = {1},

pages = {159-169},

publisher = {Springer Berlin Heidelberg},

abstract = {In tropical dry forests, a high interspecific variation in the strategies of fruiting phenology has been documented. Therefore, phenological responses may be mediated by influence of environmental variables, functional plant attributes or phylogenetic inertia. During 2 years, we recorded the fruiting phenology of 151 species belonging to 5 different growth forms of a Neotropical dry forest in Mexico. We evaluated the relationships between fruiting phenology, abiotic factors (precipitation, temperature, day-length) and functional attributes (growth form, dispersal syndrome, size and time for fruit development) using phylogenetic least squares models (PGLS). More species had ripe fruits during the dry season (92%) than during rainy months and dispersed their seeds by autochory and endozoochory. We found that fruit development time was positively correlated with fruit size and together the morphological fruit traits (size and dispersal syndrome) showed an important relationship with the growth form, but with a strong phylogenetic signal. Environmental seasonality had a strong influence on fruit ripening time, without a relevant association to the phylogeny of plant species. However, the phenological response to the environment (rainfall and day-length) at the community level was mediated by growth form. In woody species, we documented a high interspecific fruiting variation linked with the different dispersal syndromes. In herbaceous species, fruiting phenology is a trait restricted by the duration of their life cycle by rainfall seasonality, which in turn might have selected some traits (e.g., dry fruit, presence of spines, explosive dehiscence) for maximizing seed dispersal during the dry season.},

keywords = {Dispersal syndrome, Fruit development, Fruit size, Growth form, Phylogenetic signal},

pubstate = {published},

tppubtype = {article}

}

@article{MolinaSanchez2019,

title = {Spatio-temporal approach for identification of critical conservation areas: a case study with two pine species from a threatened temperate forest in Mexico},

author = {Agustín Molina Sánchez and Patricia Delgado and Antonio González-Rodríguez and Clementina González and A. Francisco Gómez-Tagle Rojas and Leonel Lopez-Toledo},

url = {https://doi.org/10.1007/s10531-019-01767-y},

doi = {10.1007/s10531-019-01767-y},

issn = {15729710},

year  = {2019},

date = {2019-01-01},

journal = {Biodiversity and Conservation},

volume = {28},

issue = {7},

pages = {1863-1883},

publisher = {Springer Netherlands},

abstract = {Fragmentation transforms natural habitats into a set of structurally and functionally differentiated small and separated patches, and causes the loss of connectivity among populations. In this study, we used a multi-temporal approach (1986, 2011 and 2016), to analyze the patterns of habitat fragmentation and to identify critical zones for the maintenance of habitat connectivity of two focal pine species (Pinus pseudostrobus and P. montezumae) with the broadest distribution and highest economic importance in the temperate forests of the Meseta Purépecha, in Michoacán, Mexico. This eco-region is currently one of the most threatened in terms of habitat degradation and extinction of forest communities. From a supervised classification of satellite images, land use coverage classes were selected and used as a basis to analyze the degree of landscape fragmentation using configuration and composition metrics and landscape connectivity based on the graph-theory approach. The fragmentation metrics suggested an increase in agricultural coverage (10.81%; fruits crop, mainly avocado), while the coverage of the forest showed a reduction (15.06%) and fragmentation throughout the study period. The landscape connectivity is lower (16.3% on average) and showed two highly important zones (Uruapan and Tancítaro) and one zone of high importance (Pátzcuaro) to maintain connectivity, considering three different dispersion distances (0.5, 5.0 and 10 km) for the species analyzed. We propose these three zones as potential habitat stepping stones to promote overall landscape connectivity, offering primary habitats and possible ecological resilience for this important forest ecosystem.},

keywords = {Conservation, Habitat patches, Land use, Management, Micro-region, Pinus},

pubstate = {published},

tppubtype = {article}

}

@article{Maldonado-Lopez2019,

title = {Leaf herbivory and fluctuating asymmetry as indicators of mangrove stress},

author = {Yurixhi Maldonado-López and Marcela Sofía Vaca-Sánchez and Armando Canché-Delgado and Silvia Ecaterina García-Jaín and Antonio González-Rodríguez and Tatiana Cornelissen and Pablo Cuevas-Reyes},

doi = {10.1007/s11273-019-09678-z},

issn = {15729834},

year  = {2019},

date = {2019-01-01},

journal = {Wetlands Ecology and Management},

volume = {0123456789},

pages = {571-580},

abstract = {Fluctuating asymmetry (FA), a widely used measure of developmental instability in plants and animals, which describes random differences in size and/or shape between the two sides of a bilateral character. We used FA as a tool to detect stress in three mangrove species (Avicennia germinans, Laguncularia racemosa, Rhizophora mangle), growing in both disturbed and conserved habitats in the Atlantic coast of Mexico. In this region, disturbed habitats are the result of deforestation, livestock, tourism and agriculture activities. Twenty plants of each species were sampled in each of four sites (two disturbed and two conserved) and levels of FA, proportion of individuals with herbivory, proportion of leaves with damage, and leaf area removed by herbivores were evaluated. In disturbed habitats, regardless of plant species, more plants were attacked by insects, more leaves were damaged, and more leaf area was removed by herbivores, indicating higher overall damage to plants. We detected that FA levels varied significantly amongst mangrove species, they were higher in disturbed compared to conserved habitats, indicating the importance of FA as a monitoring tool of mangrove stress. A positive relationship between FA and herbivory levels also indicates that herbivores might be a source of stress.},

keywords = {Fluctuating asymmetry, Habitat disturbance, Herbivory, Mangroves},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Phylogeny, fruit traits, and ecological correlates of fruiting phenology in a Neotropical dry forest},

author = {Jorge Cortés-Flores and Guadalupe Cornejo-Tenorio and Lina Adonay Urrea-Galeano and Ellen Andresen and Antonio González-Rodríguez and Guillermo Ibarra-Manríquez},

doi = {10.1007/s00442-018-4295-z},

issn = {00298549},

year  = {2019},

date = {2019-01-01},

journal = {Oecologia},

volume = {189},

issue = {1},

pages = {159-169},

publisher = {Springer Verlag},

abstract = {In tropical dry forests, a high interspecific variation in the strategies of fruiting phenology has been documented. Therefore, phenological responses may be mediated by influence of environmental variables, functional plant attributes or phylogenetic inertia. During 2 years, we recorded the fruiting phenology of 151 species belonging to 5 different growth forms of a Neotropical dry forest in Mexico. We evaluated the relationships between fruiting phenology, abiotic factors (precipitation, temperature, day-length) and functional attributes (growth form, dispersal syndrome, size and time for fruit development) using phylogenetic least squares models (PGLS). More species had ripe fruits during the dry season (92%) than during rainy months and dispersed their seeds by autochory and endozoochory. We found that fruit development time was positively correlated with fruit size and together the morphological fruit traits (size and dispersal syndrome) showed an important relationship with the growth form, but with a strong phylogenetic signal. Environmental seasonality had a strong influence on fruit ripening time, without a relevant association to the phylogeny of plant species. However, the phenological response to the environment (rainfall and day-length) at the community level was mediated by growth form. In woody species, we documented a high interspecific fruiting variation linked with the different dispersal syndromes. In herbaceous species, fruiting phenology is a trait restricted by the duration of their life cycle by rainfall seasonality, which in turn might have selected some traits (e.g., dry fruit, presence of spines, explosive dehiscence) for maximizing seed dispersal during the dry season.},

keywords = {Dispersal syndrome, Fruit development, Fruit size, Growth form, Phylogenetic signal},

pubstate = {published},

tppubtype = {article}

}

@article{Oyama2018,

title = {High Genetic Diversity and Connectivity Among Populations of Quercus candicans , Quercus crassifolia , and Quercus castanea in a Heterogeneous Landscape in Mexico},

author = {Ken Oyama and Wilfrido Ramírez-Toro and Juan Manuel Peñaloza-Ramírez and Alberto Esteban Pérez Pedraza and César Andrés Torres-Miranda and Eduardo Ruiz-Sánchez and Antonio González-Rodríguez},

doi = {10.1177/1940082918766195},

issn = {1940-0829},

year  = {2018},

date = {2018-01-01},

journal = {Tropical Conservation Science},

volume = {11},

pages = {194008291876619},

abstract = {Oaxaca state is one of the main hotspots of biodiversity in Mexico, containing almost 40% of the Mexican vascular flora, due to its high variability in habitat and climatic conditions coupled with high elevations in mountains and low elevations in valleys. We studied the genetic diversity and population structure of Quercus candicans, Quercus crassifolia, and Quercus castanea across their geographical distribution in Oaxaca state to understand how the heterogeneous physiography had driven the genetic diversity and population differentiation in these three oak species. We found high levels of genetic diversity but ca. 40% of the populations had significant values of Wright’s inbreeding coefficient. The analysis of molecular variance indicated that most of the variation occurred within populations in the three oak species. Resistance analyses showed connectivity among almost all the populations but barrier analysis found genetic breaks that limited gene flow among some populations of the oak species. Even in a heterogeneous environment such as in Oaxaca state, the oak species still have high levels of genetic diversity and landscape connectivity. However, it is necessary to maintain the genetic connectivity through the preservation of natural corridors with forests in good condition, which is necessary to maintain the cohesiveness of the species in the long term. It is also important to protect the centers of species diversity in Oaxaca state located in the subprovinces of Western Oaxacan Mountains and Valleys, Sierra Madre de Oaxaca, and Sierra Madre del Sur because they harbor most of the population genetic diversity and oak species richness, as has been shown in previous studies.},

keywords = {conservation genetics, genetic connectivity, genetic diversity and structure, Mexico, Quercus},

pubstate = {published},

tppubtype = {article}

}

@article{Zanden2018,

title = {Alternate migration strategies of eastern monarch butterflies revealed by stable isotopes},

author = {Hannah B. Vander Zanden and Carol L. Chaffee and Antonio González-Rodríguez and D. T. Tyler Flockhart and D. Ryan Norris and Marta L. Wayne},

doi = {10.1515/ami-2018-0006},

issn = {2084-8838},

year  = {2018},

date = {2018-01-01},

journal = {Animal Migration},

volume = {5},

issue = {1},

pages = {74-83},

abstract = {Alternative life history strategies are mechanisms by which organisms are able to maximize fitness across a range of environmental conditions. Fitness is maximized by different strategies depending on context, resulting in trade-offs between life history strategies. Monarch butterflies (Danaus plexippus) employ both migratory and resident life history strategies. Since residents breed throughout the year, but migrants overwinter in reproductive diapause, there are fitness trade-offs between the two strategies. We used stable isotope analysis to evaluate the geographic origins of monarchs in a yearround population in south Florida. Based on stable isotope profiles of hydrogen and carbon (δ 2 H and δ 13 C values), we found that 48% (16/33) of monarchs collected in south Florida are migrants that originated from outside the sampling region. Migrants had a larger wing length than residents; thus, switching to a resident strategy could alter their probability of reproductive success. Further work is needed to investigate the mechanism underlying this pattern, but these findings show that alternate life history strategies and sex-specific behaviors are underexplored factors influencing monarch migration and evolution.},

keywords = {alternative, carbon stable, connectivity, danaus plexippus, hydrogen stable isotopes, strategies},

pubstate = {published},

tppubtype = {article}

}

@article{Rodriguez-Correa2018,

title = {Contrasting Patterns of Population History and Seed-mediated Gene Flow in Two Endemic Costa Rican Oak Species},

author = {Hernando Rodríguez-Correa and Ken Oyama and Mauricio Quesada and Eric J. Fuchs and Antonio González-Rodríguez},

doi = {10.1093/jhered/esy011},

issn = {14657333},

year  = {2018},

date = {2018-01-01},

journal = {Journal of Heredity},

volume = {109},

issue = {5},

pages = {530-542},

abstract = {Lower Central America is an important area to study recent population history and diversification of Neotropical species due to its complex and dynamic geology and climate. Phylogeographic studies in this region are few in comparison with other regions and even less for tree species. The aim of the present study was to characterize the phylogeographic structure in 2 partially co-distributed endemic oak species (Quercus costaricensis and Q. bumelioides) of the Costa Rican mountains using chloroplast short sequence repeats (cpSSRs), and to test for the effect of geological and palaeoclimatic processes on their population history. Genetic diversity and structure, haplotype networks, patterns of seed-mediated gene flow and historical demography were estimated for both species. Results suggested contrasting patterns. Quercus costaricensis exhibited high values of genetic diversity, a marked phylogeographic structure, a north-to-south genetic diversity gradient and evidence of a demographic expansion during the Quaternary. Quercus bumelioides did not show significant genetic structure and the haplotype network and historical demography estimates suggested a recent population expansion probably during the Pleistocene-Holocene transition. The phylogeographic structure of Q. costaricensis seems to be related to Pleistocene altitudinal migration due to its higher altitudinal distribution. Meanwhile, historical seed-mediated gene flow through the lower altitudinal distribution of Q. bumelioides may have promoted the homogenization of genetic variation. Population expansion and stable availability of suitable climatic areas in both species probably indicate that palaeoclimatic changes promoted downwards altitudinal migration and formation of continuous forests allowing oak species to expand their distribution into the Panamanian mountains during glacial stages.},

keywords = {chloroplast microsatellites, Fagaceae, gene flow, Middle America, Phylogeography, Quercus},

pubstate = {published},

tppubtype = {article}

}

@article{Chavez-Vergara2018,

title = {Direct and legacy effects of planttraits control litter decomposition in a deciduous oak forest in Mexico},

author = {Bruno Chávez-Vergara and Agustín Merino and Antonio González-Rodríguez and Ken Oyama and Felipe García-Oliva},

doi = {10.7717/peerj.5095},

issn = {21678359},

year  = {2018},

date = {2018-01-01},

journal = {PeerJ},

volume = {2018},

issue = {6},

pages = {1-27},

abstract = {Background. Litter decomposition is a key process in the functioning of forest ecosystems, because it strongly controls nutrient recycling and soil fertility maintenance. The interaction between the litter chemical composition and the metabolism of the soil microbial community has been described as the main factor of the decomposition process based on three hypotheses: substrate-matrix interaction (SMI), functional breadth (FB) and home-field advantage (HFA). The objective of the present study was to evaluate the effect of leaf litter quality (as a direct plant effect, SMI hypothesis), the metabolic capacity of the microbial community (as a legacy effect, FB hypothesis), and the coupling between the litter quality and microbial activity (HFA hypothesis) on the litter decomposition of two contiguous deciduous oak species at a local scale. Methods. To accomplish this objective, we performed a litterbag experiment in the field for 270 days to evaluate mass loss, leaf litter quality and microbial activity in a complete factorial design for litter quality and species site. Results. The litter of Quercus deserticola had higher rate of decomposition independently of the site, while the site of Quercus castanea promoted a higher rate of decomposition independently of the litter quality, explained by the specialization of the soil microbial community in the use of recalcitrant organic compounds. The Home- Field Advantage Index was reduced with the decomposition date (22% and 4% for 30 and 270 days, respectively). Discussion. We observed that the importance of the coupling of litter quality and microbial activity depends on decomposition stage. At the early decomposition stage, the home-advantage hypothesis explained the mass loss of litter; however, in the advanced decomposition stage, the litter quality and the metabolic capacity of the microbial community can be the key drivers.},

keywords = {13C NMR, Differential Scaning Calorimetry, Enzymatic activity, Litter decomposition, Quercus},

pubstate = {published},

tppubtype = {article}

}

@article{Oyama2018b,

title = {High Genetic Diversity and Connectivity Among Populations of Quercus candicans, Quercus crassifolia, and Quercus castanea in a Heterogeneous Landscape in Mexico},

author = {Ken Oyama and Wilfrido Ramírez-Toro and Juan Manuel Peñaloza-Ramírez and Alberto Esteban Pérez Pedraza and César Andrés Torres-Miranda and Eduardo Ruiz-Sánchez and Antonio González-Rodríguez},

doi = {10.1177/1940082918766195},

issn = {19400829},

year  = {2018},

date = {2018-01-01},

journal = {Tropical Conservation Science},

volume = {11},

publisher = {SAGE Publications Inc.},

abstract = {Oaxaca state is one of the main hotspots of biodiversity in Mexico, containing almost 40% of the Mexican vascular flora, due to its high variability in habitat and climatic conditions coupled with high elevations in mountains and low elevations in valleys. We studied the genetic diversity and population structure of Quercus candicans, Quercus crassifolia, and Quercus castanea across their geographical distribution in Oaxaca state to understand how the heterogeneous physiography had driven the genetic diversity and population differentiation in these three oak species. We found high levels of genetic diversity but ca. 40% of the populations had significant values of Wright’s inbreeding coefficient. The analysis of molecular variance indicated that most of the variation occurred within populations in the three oak species. Resistance analyses showed connectivity among almost all the populations but barrier analysis found genetic breaks that limited gene flow among some populations of the oak species. Even in a heterogeneous environment such as in Oaxaca state, the oak species still have high levels of genetic diversity and landscape connectivity. However, it is necessary to maintain the genetic connectivity through the preservation of natural corridors with forests in good condition, which is necessary to maintain the cohesiveness of the species in the long term. It is also important to protect the centers of species diversity in Oaxaca state located in the subprovinces of Western Oaxacan Mountains and Valleys, Sierra Madre de Oaxaca, and Sierra Madre del Sur because they harbor most of the population genetic diversity and oak species richness, as has been shown in previous studies.},

keywords = {conservation genetics, genetic connectivity, genetic diversity and structure, Mexico, Quercus},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Hybridization increases canopy arthropod diversity in the Quercus affinis × Quercus laurina complex},

author = {Yurixhi Maldonado-López and Marcela Sofía Vaca-Sánchez and Antonio González-Rodríguez and Ken Oyama and Edmundo López-Barbosa and Marcilio Fagundes and Pablo Cuevas-Reyes},

doi = {10.1007/s10841-018-0103-7},

issn = {15729753},

year  = {2018},

date = {2018-01-01},

journal = {Journal of Insect Conservation},

volume = {22},

issue = {5-6},

pages = {781-793},

publisher = {Springer International Publishing},

abstract = {Understanding the factors that influence the diversity and composition of arthropod communities is a major topic in ecology. Canopy arthropod communities are a major constituent of biodiversity and show great variation in time and space according to different factors. Recently, genetic variation within tree species has attracted attention as a significant factor determining the diversity and composition of canopy arthropod communities. A major source of genetic and phenotypic novelty in plant species is interspecific hybridization, and therefore it is of interest to evaluate how this process affects the communities of associated organisms. In this study, we used microsatellite markers and geometric morphometry of leaf shape to analyze genetic and morphological variation in 45 individuals in a local hybrid zone between the oaks Quercus affinis and Q. laurina in Mexico. Individual trees were assigned to one of the parental species or to the hybrid category. The percentage of leaf area removed by herbivores was quantified in each individual and the canopies of five individuals of each categeory (two parental species and hybrids) was fogged with insecticide to assess the diversity and composition of arthropod communities. Results indicated that hybrid trees experience higher levels of herbivory than parental species and also sustain a higher abundance and richness of canopy arthropods. In general, our study supports the “hybrid susceptibility hypothesis” that predicts a higher incidence of associated arthropods on hybrid plants than in their parental species as result of the disruption of co-adapted gene complexes associated to resistance traits.},

keywords = {Arthropod diversity, Canopy, Hybrids, Quercus laurina × Quercus affinis complex},

pubstate = {published},

tppubtype = {article}

}

@article{Martins2018,

title = {Landscape genomics provides evidence of climate-associated genetic variation in Mexican populations of Quercus rugosa},

author = {Karina Martins and Paul F. Gugger and Jesus Llanderal-Mendoza and Antonio González-Rodríguez and Sorel T. Fitz-Gibbon and Jian Li Zhao and Hernando Rodríguez-Correa and Ken Oyama and Victoria L. Sork},

doi = {10.1111/eva.12684},

issn = {17524571},

year  = {2018},

date = {2018-01-01},

journal = {Evolutionary Applications},

volume = {11},

issue = {10},

pages = {1842-1858},

publisher = {Wiley-Blackwell},

abstract = {Local adaptation is a critical evolutionary process that allows plants to grow better in their local compared to non-native habitat and results in species-wide geographic patterns of adaptive genetic variation. For forest tree species with a long generation time, this spatial genetic heterogeneity can shape the ability of trees to respond to rapid climate change. Here, we identify genomic variation that may confer local environmental adaptations and then predict the extent of adaptive mismatch under future climate as a tool for forest restoration or management of the widely distributed high-elevation oak species Quercus rugosa in Mexico. Using genotyping by sequencing, we identified 5,354 single nucleotide polymorphisms (SNPs) genotyped from 103 individuals across 17 sites in the Trans-Mexican Volcanic Belt, and, after controlling for neutral genetic structure, we detected 74 FST outlier SNPs and 97 SNPs associated with climate variation. Then, we deployed a nonlinear multivariate model, Gradient Forests, to map turnover in allele frequencies along environmental gradients and predict areas most sensitive to climate change. We found that spatial patterns of genetic variation were most strongly associated with precipitation seasonality and geographic distance. We identified regions of contemporary genetic and climatic similarities and predicted regions where future populations of Q. rugosa might be at risk due to high expected rate of climate change. Our findings provide preliminary details for future management strategies of Q. rugosa in Mexico and also illustrate how a landscape genomic approach can provide a useful tool for conservation and resource management strategies.},

keywords = {assisted gene flow, climate change, genotyping by sequencing, landscape genomics, natural selection, Quercus, restoration, Trans-Mexican Volcanic Belt},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Patterns of herbivory and leaf morphology in two Mexican hybrid oak complexes: Importance of fluctuating asymmetry as indicator of environmental stress in hybrid plants},

author = {Pablo Cuevas-Reyes and Armando Canché-Delgado and Yurixhi Maldonado-López and G. Wilson Fernandes and Ken Oyama and Antonio González-Rodríguez},

doi = {10.1016/j.ecolind.2018.03.009},

issn = {1470160X},

year  = {2018},

date = {2018-01-01},

journal = {Ecological Indicators},

volume = {90},

pages = {164-170},

publisher = {Elsevier B.V.},

abstract = {Interspecific hybridization is a prevalent process in plant species that may have different ecological and evolutionary consequences. Interactions with herbivorous insects may be altered because of hybridization among host plants. These changes result from the morphological, physiological and chemical traits expressed in hybrid individuals. Therefore, it is of interest to document the changes in traits such as leaf morphology and their consequences on patterns of herbivory by insects in hybrid complexes of plants. Another useful indicator that may serve to evaluate developmental instability resulting from genetic or environmental stress in hybrid plants is fluctuating asymmetry. In this study, we used two previously genetically characterized complexes of hybridizing Mexican oaks as models to compare and understand the relationships between leaf morphology, fluctuating asymmetry and herbivory levels in parental and hybrid individuals. Results indicated that in the Quercus affinis × Q. laurina complex, hybrid individuals show a distinct morphology in relation to the parental species, while in the Q. magnoliifolia × Q. resinosa complex, hybrids were similar to Q. resinosa. In both hybrid complexes, our results show that hybrid individuals have higher levels of fluctuating asymmetry and herbivory levels, which may reflect higher levels of genetic or environmental stress in comparison to the parental species. These results might help explain why oak species usually remain distinct despite the high frequency of hybridization characteristic of the genus.},

keywords = {Environmental stress, Fluctuating asymmetry, Herbivory, Hybrid complexes, Leaf morphology, Quercus},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Phylogeography and climate-associated morphological variation in the endemic white oak Quercus deserticola (Fagaceae) along the Trans-Mexican Volcanic Belt},

author = {Flor Rodríguez-Gómez and Ken Oyama and Magaly Ochoa-Orozco and Luis Mendoza-Cuenca and Ricardo Gaytán-Legaria and Antonio González-Rodríguez},

doi = {10.1139/cjb-2017-0116},

issn = {19162804},

year  = {2018},

date = {2018-01-01},

journal = {Botany},

volume = {96},

issue = {2},

pages = {121-131},

publisher = {Canadian Science Publishing},

abstract = {Mexico is a center of diversification for the genus Quercus, with an important number of taxa occurring along the Trans-Mexican Volcanic Belt (TMVB). However, the impact of the interaction between historical and current climatic variation and geological heterogeneity in the TMVB on the genetic and phenotypic diversification within oak species has been scarcely investigated. We used chloroplast DNA microsatellites and a geometric morphometrics analysis of leaf shape to understand differentiation between populations of Quercus deserticola Trel., which inhabits dry highlands along the TMVB. Ecological niche modeling for present-day conditions and projections into past scenarios were performed to evaluate the influence of environmental variables on the evolutionary history of the species. Results showed high genetic diversity (hS = 0.774) and high genetic structure (RST = 0.75) and the morphological subdivision of populations into two clusters, corresponding to the west/south and east/north sectors of the Q. deserticola geographic distribution. Ecological niche modeling indicated that the potential distribution of the species has remained similar from the late Pleistocene to the present. Seemingly, the phylogeographic structure of the species has been shaped by low seed-mediated gene flow and mostly local migration patterns. In turn, leaf shape is responding to climate differences either through phenotypic plasticity or local adaptation.},

keywords = {ecological niche modeling, gene flow, Last Glacial Maximum, Mexican oaks},

pubstate = {published},

tppubtype = {article}

}