2021
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.
2018
Oyama, Ken; Ramírez-Toro, Wilfrido; Peñaloza-Ramírez, Juan Manuel; Pedraza, Alberto Esteban Pérez; Torres-Miranda, César Andrés; Ruiz-Sánchez, Eduardo; González-Rodríguez, Antonio
High Genetic Diversity and Connectivity Among Populations of Quercus candicans , Quercus crassifolia , and Quercus castanea in a Heterogeneous Landscape in Mexico Artículo de revista
En: Tropical Conservation Science, vol. 11, pp. 194008291876619, 2018, ISSN: 1940-0829.
Resumen | Enlaces | Etiquetas: conservation genetics, genetic connectivity, genetic diversity and structure, Mexico, Quercus
@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}
}
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.
Oyama, Ken; Ramírez-Toro, Wilfrido; Peñaloza-Ramírez, Juan Manuel; Pedraza, Alberto Esteban Pérez; Torres-Miranda, César Andrés; Ruiz-Sánchez, Eduardo; González-Rodríguez, Antonio
High Genetic Diversity and Connectivity Among Populations of Quercus candicans, Quercus crassifolia, and Quercus castanea in a Heterogeneous Landscape in Mexico Artículo de revista
En: Tropical Conservation Science, vol. 11, 2018, ISSN: 19400829.
Resumen | Enlaces | Etiquetas: conservation genetics, genetic connectivity, genetic diversity and structure, Mexico, Quercus
@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}
}
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.