Université de Fribourg

Parasites promote host gene flow in a metapopulation

Altermatt, Florian ; Hottinger, Jürgen W. ; Ebert, Dieter

Local adaptation is a powerful mechanism to maintain genetic diversity in subdivided populations. It counteracts the homogenizing effect of gene flow because immigrants have an inferior fitness in the new habitat. This picture may be reversed in host populations where parasites influence the success of immigrating hosts. Here we report two experiments testing whether parasite abundance and...