Inferring landscape effects on dispersal from genetic distances: how far can we go?

Détails

ID Serval
serval:BIB_B062A7473243
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Inferring landscape effects on dispersal from genetic distances: how far can we go?
Périodique
Molecular Ecology
Auteur(s)
Jaquiéry J., Broquet T., Hirzel A.H., Yearsley J., Perrin N.
ISSN
1365-294X (Electronic)
ISSN-L
0962-1083
Statut éditorial
Publié
Date de publication
2011
Peer-reviewed
Oui
Volume
20
Numéro
4
Pages
692-705
Langue
anglais
Résumé
Functional connectivity affects demography and gene dynamics in fragmented populations. Besides species-specific dispersal ability, the connectivity between local populations is affected by the landscape elements encountered during dispersal. Documenting these effects is thus a central issue for the conservation and management of fragmented populations. In this study, we compare the power and accuracy of three methods (partial correlations, regressions and Approximate Bayesian Computations) that use genetic distances to infer the effect of landscape upon dispersal. We use stochastic individual-based simulations of fragmented populations surrounded by landscape elements that differ in their permeability to dispersal. The power and accuracy of all three methods are good when there is a strong contrast between the permeability of different landscape elements. The power and accuracy can be further improved by restricting analyses to adjacent pairs of populations. Landscape elements that strongly impede dispersal are the easiest to identify. However, power and accuracy decrease drastically when landscape complexity increases and the contrast between the permeability of landscape elements decreases. We provide guidelines for future studies and underline the needs to evaluate or develop approaches that are more powerful.
Mots-clé
Bayes Theorem, Computer Simulation, Ecology/methods, Ecosystem, Genetics, Population/methods, Models, Biological, Models, Statistical, Stochastic Processes
Pubmed
Web of science
Création de la notice
26/10/2010 13:04
Dernière modification de la notice
03/03/2018 20:34
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