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.
2017
Pérez-Crespo, María José; Ornelas, Juan Francisco; González-Rodríguez, Antonio; Ruiz-Sanchez, Eduardo; Vásquez-Aguilar, Antonio Acini; Ramírez-Barahona, Santiago
En: Journal of Biogeography, vol. 44, iss. 11, pp. 2501-2514, 2017, ISSN: 13652699.
Resumen | Enlaces | Etiquetas: Loranthaceae, Mesoamerica, Mexico, Mistletoes, Phylogeography, Pleistocene, Psittacanthus, Trans-Mexican Volcanic Belt
@article{nokey,
title = {Phylogeography and population differentiation in the Psittacanthus calyculatus (Loranthaceae) mistletoe: a complex scenario of climate–volcanism interaction along the Trans-Mexican Volcanic Belt},
author = {María José Pérez-Crespo and Juan Francisco Ornelas and Antonio González-Rodríguez and Eduardo Ruiz-Sanchez and Antonio Acini Vásquez-Aguilar and Santiago Ramírez-Barahona},
doi = {10.1111/jbi.13070},
issn = {13652699},
year = {2017},
date = {2017-01-01},
journal = {Journal of Biogeography},
volume = {44},
issue = {11},
pages = {2501-2514},
publisher = {Blackwell Publishing Ltd},
abstract = {Aim: The formation of the Trans-Mexican Volcanic Belt (TMVB) played an important role in driving inter- and intraspecific diversification at high elevations. However, Pleistocene climate changes and ecological factors might also contribute to plant genetic structuring along the volcanic belt. Here, we analysed phylogeographical patterns of the parrot-mistletoe Psittacanthus calyculatus to determine the relative contribution of these different factors. Location: Trans-Mexican Volcanic Belt. Methods: Using nuclear and chloroplast DNA sequence data for 370 individuals, we investigate the genetic differentiation of 35 populations across the species range. We conducted phylogenetic, population and spatial genetic analyses of P. calyculatus sequences along with ecological niche modelling and Bayesian inference methods to gain insight into the structuring of genetic variation of these populations. Results: Our analyses revealed population structure with three genetic groups corresponding to individuals from Oaxaca and those from the central-eastern and western TMVB regions. A significant genetic signal of demographic expansion, an east-to-west expansion predicted by species distribution modelling, and approximate Bayesian computation analyses strongly supported a scenario of habitat isolation and invasion of TMVB by P. calyculatus during the late-Pleistocene. Main conclusions: The genetic differentiation of P. calyculatus may be explained by the combined effects of (1) geographical isolation linked to the effects of the glacial/interglacial cycles and environmental factors, driving genetic differentiation from congeners into more xeric vegetation and (2) the invasion of TMVB from east to west, suggesting a role for both colonization and glacial/interglacial cycles models.},
keywords = {Loranthaceae, Mesoamerica, Mexico, Mistletoes, Phylogeography, Pleistocene, Psittacanthus, Trans-Mexican Volcanic Belt},
pubstate = {published},
tppubtype = {article}
}
Aim: The formation of the Trans-Mexican Volcanic Belt (TMVB) played an important role in driving inter- and intraspecific diversification at high elevations. However, Pleistocene climate changes and ecological factors might also contribute to plant genetic structuring along the volcanic belt. Here, we analysed phylogeographical patterns of the parrot-mistletoe Psittacanthus calyculatus to determine the relative contribution of these different factors. Location: Trans-Mexican Volcanic Belt. Methods: Using nuclear and chloroplast DNA sequence data for 370 individuals, we investigate the genetic differentiation of 35 populations across the species range. We conducted phylogenetic, population and spatial genetic analyses of P. calyculatus sequences along with ecological niche modelling and Bayesian inference methods to gain insight into the structuring of genetic variation of these populations. Results: Our analyses revealed population structure with three genetic groups corresponding to individuals from Oaxaca and those from the central-eastern and western TMVB regions. A significant genetic signal of demographic expansion, an east-to-west expansion predicted by species distribution modelling, and approximate Bayesian computation analyses strongly supported a scenario of habitat isolation and invasion of TMVB by P. calyculatus during the late-Pleistocene. Main conclusions: The genetic differentiation of P. calyculatus may be explained by the combined effects of (1) geographical isolation linked to the effects of the glacial/interglacial cycles and environmental factors, driving genetic differentiation from congeners into more xeric vegetation and (2) the invasion of TMVB from east to west, suggesting a role for both colonization and glacial/interglacial cycles models.