Publicaciones

@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}

}

@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}

}

@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}

}

@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{Oyama2017,

title = {Gene flow interruption in a recently human-modified landscape: The value of isolated trees for the maintenance of genetic diversity in a Mexican endemic red oak},

author = {Ken Oyama and María Luisa Herrera-Arroyo and Víctor Rocha-Ramírez and Julieta Benítez-Malvido and Eduardo Ruiz-Sánchez and Antonio González-Rodríguez},

url = {http://dx.doi.org/10.1016/j.foreco.2017.01.018},

doi = {10.1016/j.foreco.2017.01.018},

issn = {03781127},

year  = {2017},

date = {2017-01-01},

journal = {Forest Ecology and Management},

volume = {390},

pages = {27-35},

publisher = {Elsevier B.V.},

abstract = {Gene flow within and among populations is an important factor to maintain genetic cohesiveness and diversity across landscapes. Nowadays, human land use has led to a large forest conversion, creating many fragmented areas where remnant trees play an important role in conserving biodiversity. In this study, we analyzed the effects of a recent anthropogenic forest fragmentation on the genetic diversity and genetic heterogeneity of pollen pools accepted by individuals of the red oak Quercus castanea growing in forest patches and as isolated trees in central Mexico. Pollen movement was also evaluated by the analysis of outcrossing rates using seven nuclear microsatellites. We assumed that adult trees are remnants of the populations that existed previous to the forest fragmentation, while progenies of these trees are the result of recent reproductive events occurring after the fragmentation. We found high genetic diversity in both adult trees and progenies, even though progenies of isolated trees showed a significant reduction in heterozygosity as compared to their mother trees. However, the results of TWOGENER and mating system analyses indicated similar numbers of pollen donors in the progenies of mother trees from fragments and in isolated trees. Overall, our results suggest that gene flow is still extensive among forest fragments and isolated trees, conferring them a great value for the conservation of genetic diversity and connectivity.},

keywords = {Forest fragmentation, gene flow, Genetic diversity, Isolated trees, Outcrossing rates, Quercus castanea},

pubstate = {published},

tppubtype = {article}

}