Life history traits variation in heterogeneous environment: The case of a freshwater snail resistance to pond drying

Ecology and Evolution

Elodie Chapuis¹ 

[1] UMR CBGP,Campus de Baillarguet, Montferrier-sur-Lez Cedex, France

关键词: Common garden experiment;    heterogeneous environments;    life history traits;    local adaptation;    temporary habitats;   

DOI  :  10.1002/ece3.68

来源: Wiley

【 摘 要 】

Abstract

Ecologists and population geneticists have long suspected that the diversity of living organisms was connected to the structure of their environment. In heterogeneous environments, diversifying selection combined to restricted gene flow may indeed lead to locally adapted populations. The freshwater snail, Galba truncatula, is a good model to address this question because it is present in a heterogeneous environment composed of temporary and permanent waters. In order to test the selective importance of those environments, we proposed here to measure survival of lineages from both habitats during drought episodes. To this purpose, we experimentally submitted adults and juveniles individuals from both habitats to drought. We found a difference in desiccation resistance between temporary and permanents waters only for adults. Adults from temporary habitats were found more resistant to drought. This divergence in desiccation resistance seems to explain the unexpected life history traits differences between habitats observed.

【 授权许可】

CC BY-NC   
© 2011 The Authors. MicrobiologyOpen published by Blackwell Publishing Ltd.

Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.