Département Ecologie et évolution des poissons

Écologie et évolution des poissons (FishEc)

Nous étudions l'écologie, l'évolution et la biodiversité des organismes aquatiques, en particulier des poissons, de leurs proies et de leurs ennemis. L'accent est mis ici sur la dynamique évolutionnaire et écologique de la diversité.

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News

7 Juin 2018
Deciphering the Interdependence between Ecological and Evolutionary Networks 
Biological systems consist of ecological and evolutionary processes that interact within and across hierarchical levels. Yet quantitative frameworks to explore the complex dynamics of biological systems when interdependencies among levels of the hierarchy occur are scarce. In this study Melián et al. show that disentangling a network is not enough to understand biodiversity: we need data-driven theory to tangle hierarchical networks to fully understand the webs of life.
Publication

9 mai 2018
Arrival order and realease from competition does not explain why haplochromine cichlids radiated in Lake Victoria
Moritz Muschick and colleagues searched sediment cores from Lake Victoria to test the idea of priority effect using fossils found in the sediment layers before and after the desiccation of Lake Victoria. He could show that cichlids were not the first to arrive in the re-filling Lake Victoria about 15'000 years ago but that other lineages such as cyprinids and 'tilapias' were also present at the same time. Thus, it was not release from competition that made the enormous haplochromine cichlid radiation possible.
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9 Mai 2018
Rapport de l’UICN sur la menace d’extinction d’espèces dans le lac Victoria
Le lac Victoria, en Afrique orientale, est connu pour sa grande biodiversité. Mais un grand nombre de poissons, de mollusques, de crustacés et de plantes aquatiques sont menacés. C’est ce que montre un rapport récemment publié par l’Union internationale pour la conservation de la nature (UICN), auquel l’Eawag a également contribué.
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8 Mai 2018
When single cell algae Chloralla variablis and their deadly counterpart, a chlorovirus compete the outcome is the same across replicated trials: After repeated periods of decline and growth most algae cells become resistant. 
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Projets

We investigate the mechanisms of speciation and adaptive radiation
Genome evolution and genomic divergence across the Swiss Alpine whitefish radiation
Investigating the interactions between migration ecology, local adaptation and diversification