Publications des scientifiques de l'IRD

Chapuis Elodie, Lamy T., Pointier J. P., Juillet N., Segard A., Jarne P., David P. (2017). Bioinvasion triggers rapid evolution of life histories in freshwater snails. American Naturalist, 190 (5), p. 694-706. ISSN 0003-0147.

Titre du document
Bioinvasion triggers rapid evolution of life histories in freshwater snails
Année de publication
2017
Type de document
Article référencé dans le Web of Science WOS:000413518600009
Auteurs
Chapuis Elodie, Lamy T., Pointier J. P., Juillet N., Segard A., Jarne P., David P.
Source
American Naturalist, 2017, 190 (5), p. 694-706 ISSN 0003-0147
Biological invasions offer interesting situations for observing how novel interactions between closely related, formerly allopatric species may trigger phenotypic evolution in situ. Assuming that successful invaders are usually filtered to be competitively dominant, invasive and native species may follow different trajectories. Natives may evolve traits that minimize the negative impact of competition, while trait shifts in invasives should mostly reflect expansion dynamics, through selection for colonization ability and transiently enhanced mutation load at the colonization front. These ideas were tested through a large-scale common-garden experiment measuring life-history traits in two closely related snail species, one invasive and one native, co-occurring in a network of freshwater ponds in Guadeloupe. We looked for evidence of recent evolution by comparing uninvaded or recently invaded sites with long-invaded ones. The native species adopted a life history favoring rapid population growth (i.e., increased fecundity, earlier reproduction, and increased juvenile survival) that may increase its prospects of coexistence with the more competitive invader. We discuss why these effects are more likely to result from genetic change than from maternal effects. The invader exhibited slightly decreased overall performances in recently colonized sites, consistent with a moderate expansion load resulting from local founder effects. Our study highlights a rare example of rapid life-history evolution following invasion.
Plan de classement
Limnologie biologique / Océanographie biologique [034]
Description Géographique
GUADELOUPE
Localisation
Fonds IRD [F B010071306]
Identifiant IRD
fdi:010071306
Contact