Fish communities in the Anthropocene: detecting drivers of changes in the deep peri-alpine Lake Geneva - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Article Dans Une Revue Inland Waters Année : 2017

Fish communities in the Anthropocene: detecting drivers of changes in the deep peri-alpine Lake Geneva

Résumé

Climate forcing, in combination with local anthropogenic pressures, has drastically modified the physical and chemical properties of lakes worldwide, affecting the abundance and diversity of fish populations. In the context of these combined changes, understanding the interactions between global and local forcing has become a major challenge for developing sustainable fisheries. We analyzed commercial landing statistics of Lake Geneva to describe the long-term changes in the abundance of exploited fish species and to identify mechanisms responsible for fish population changes. We showed a significant relationship between the decrease in phosphorus concentrations and structural changes in the composition of the fish community. Local management of reducing phosphorus loadings played a major role in the recovery of whitefish (Coregonus lavaretus) spawning areas and slowed the process toward more climate-induced percid and cyprinid communities. In addition, rising spring water temperatures have increased whitefish larval growth rates and improved whitefish recruitment. Unexpectedly, climate change and phosphorus reduction can have synergistic effects, and our results highlight the need to consider interactions between global and local anthropogenic forcing to fully understand and predict lake fish population variability in a warming world.

Dates et versions

hal-02606314 , version 1 (16-05-2020)

Identifiants

Citer

Orlane Anneville, C. Vogel, Jérémy Lobry, Jean Guillard. Fish communities in the Anthropocene: detecting drivers of changes in the deep peri-alpine Lake Geneva. Inland Waters, 2017, 7 (1), pp.65-76. ⟨10.1080/20442041.2017.1294350⟩. ⟨hal-02606314⟩
6 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More