Authors
Thomas Broquet, Sonia Angelone, Julie Jaquiery, Pierre Joly, JEAN‐PAUL LENA, Thierry Lengagne, Sandrine Plenet, Emilien Luquet, Nicolas Perrin
Publication date
2010/12
Journal
Conservation Biology
Volume
24
Issue
6
Pages
1596-1605
Publisher
Blackwell Publishing Inc
Description
Connectivity among populations plays a crucial role in maintaining genetic variation at a local scale, especially in small populations affected strongly by genetic drift. The negative consequences of population disconnection on allelic richness and gene diversity (heterozygosity) are well recognized and empirically established. It is not well recognized, however, that a sudden drop in local effective population size induced by such disconnection produces a temporary disequilibrium in allelic frequency distributions that is akin to the genetic signature of a demographic bottleneck. To document this effect, we used individual‐based simulations and empirical data on allelic richness and gene diversity in six pairs of isolated versus well‐connected (core) populations of European tree frogs. In our simulations, population disconnection depressed allelic richness more than heterozygosity and thus resulted in a temporary …
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Scholar articles
T Broquet, S Angelone, J Jaquiery, P Joly, JP LENA… - Conservation Biology, 2010