Multiple geographic origins and high genetic differentiation of the {Alpine} marmots reintroduced in the {Pyrenees}

Reintroductions inherently involve a small number of founders leading reintroduced populations to be prone to genetic drift and, consequently, to inbreeding depression. Assessing the origins as the genetic diversity and structure of reintroduced populations compared to native populations are thus crucial to foresee their future. Here, we aim to clarify the origins of the Alpine marmots reintroduced in the Pyrenees and to evaluate the genetic consequences of this reintroduction after almost 30 years without monitoring. We search for the origins and compare the genetic structure and the genetic variability of three reintroduced Pyrenean and eight native Alpine populations using pairwise genetic distances, Bayesian clustering method and multivariate analyses. Our results reveal that the Alpine marmots reintroduced in the Pyrenees originated both from the Northern and the Southern Alps, and that, despite these multiple origins, none of the current Pyrenean marmots are admixed. The reintroduction led to a strong genetic differentiation and to a decrease in genetic diversity. This pattern likely results from the small number of founders and the low dispersal capacities of Alpine marmots and thus, highlight the necessity to consider both genetic characteristics and natural history when reintroducing a species.

Références

Title
Multiple geographic origins and high genetic differentiation of the {Alpine} marmots reintroduced in the {Pyrenees}
Publication Type
Journal Article
Year of Publication
2016
Journal
Conservation Genetics
Volume
17
Pagination
1157–1169
Date Published
oct
ISSN
1572-9737
Keywords
CNRS, Lautaret
Submitted on 21 October 2021