Population structure in Neotropical plants

Author(s)
Agnes S Dellinger, Ovidiu Paun, Juliane Baar, Eva M Temsch, Diana Fernández-Fernández, Jürg Schönenberger
Abstract

Animal pollinators mediate gene flow among plant populations, but in contrast to well-studied topographic and (Pleistocene) environmental isolating barriers, their impact on population genetic differentiation remains largely unexplored. Comparing how these multifarious factors drive microevolutionary histories is, however, crucial for better resolving macroevolutionary patterns of plant diversification. Here we combined genomic analyses with landscape genetics and niche modelling across six related Neotropical plant species (424 individuals across 33 localities) differing in pollination strategy to test the hypothesis that highly mobile (vertebrate) pollinators more effectively link isolated localities than less mobile (bee) pollinators. We found consistently higher genetic differentiation (FST ) among localities of bee- than vertebrate-pollinated species with increasing geographical distance, topographic barriers and historical climatic instability. High admixture among montane populations further suggested relative climatic stability of Neotropical montane forests during the Pleistocene. Overall, our results indicate that pollinators may differentially impact the potential for allopatric speciation, thereby critically influencing diversification histories at macroevolutionary scales.

Organisation(s)
Department of Botany and Biodiversity Research
External organisation(s)
University of Colorado, Boulder, QCNE, Instituto Nacional de Biodiversidad, Quito, Ecaudor.
Journal
Molecular Ecology
Volume
31
Pages
2264-2280
No. of pages
17
ISSN
0962-1083
DOI
https://doi.org/10.1111/mec.16403
Publication date
02-2022
Peer reviewed
Yes
Austrian Fields of Science 2012
106012 Evolutionary research, 106003 Biodiversity research, 106036 Population genetics
Keywords
ASJC Scopus subject areas
Genetics, Ecology, Evolution, Behavior and Systematics
Portal url
https://ucris.univie.ac.at/portal/en/publications/population-structure-in-neotropical-plants(282b4212-a30a-4adb-a416-e818d33e5b14).html