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| Auer, Sonya K.; Anderson, Graeme J.; Mckelvey, Simon; Bassar, Ronald D.; Mclennan, Darryl; Armstrong, John D.; Nislow, Keith H.; Downie, Helen K.; Mckelvey, Lynn; Morgan, Thomas A. J.; Salin, Karine; Orrell, Danielle L.; Gauthey, Alice; Reid, Thomas C.; Metcalfe, Neil B.. |
| Organisms can modify their surrounding environment, but whether these changes are large enough to feed back and alter their evolutionary trajectories is not well understood, particularly in wild populations. Here we show that nutrient pulses from decomposing Atlantic salmon (Salmo salar) parents alter selection pressures on their offspring with important consequences for their phenotypic and genetic diversity. We found a strong survival advantage to larger eggs and faster juvenile metabolic rates in streams lacking carcasses but not in streams containing this parental nutrient input. Differences in selection intensities led to significant phenotypic divergence in these two traits among stream types. Stronger selection in streams with low parental nutrient... |
| Tipo: Text |
Palavras-chave: Eco-evolutionary dynamics; Eco-evolutionary feedbacks; Natural selection; Niche construction; Salmo salar; Selection differential; Selection gradient. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00414/52586/53426.pdf |
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| Sauterey, Boris; Ward, Ben A.; Follows, Michael J.; Bowler, Chris; Claessen, David. |
| The functional and taxonomic biogeography of marine microbial systems reflects the current state of an evolving system. Current models of marine microbial systems and biogeochemical cycles do not reflect this fundamental organizing principle. Here, we investigate the evolutionary adaptive potential of marine microbial systems under environmental change and introduce explicit Darwinian adaptation into an ocean modelling framework, simulating evolving phytoplankton communities in space and time. To this end, we adopt tools from adaptive dynamics theory, evaluating the fitness of invading mutants over annual timescales, replacing the resident if a fitter mutant arises. Using the evolutionary framework, we examine how community assembly, specifically the... |
| Tipo: Text |
Palavras-chave: Phytoplankton; Competition; Trait-based adaptive strategies; Adaptive dynamics; Eco-evolutionary dynamics; Trade-off; Community; Global circulation model. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00617/72883/71917.pdf |
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