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| Saucède, Thomas; Guillaumot, Charlène; Michel, Loic; Fabri-ruiz, Salomé; Bazin, Alexis; Cabessut, Marie; Garcia-berro, Aurora; Mateos, Amélie; Mathieu, Olivier; De Ridder, Chantal; Dubois, Philippe; Danis, Bruno; David, Bruno; Diaz, Angie; Lepoint, Gilles; Motreuil, Sébastien; Poulin, Elie; Féral, Jean-pierre. |
| In the Kerguelen Islands, the multiple effects of climate change are expected to impact coastal marine habitats. Species distribution models (SDM) can represent a convenient tool to predict the biogeographic response of species to climate change but biotic interactions are not considered in these models. Nevertheless, new species interactions can emerge in communities exposed to environmental changes and the structure of biotic interactions is directly related to the potential resilience of ecosystems. Trophic interaction studies can help predict species vulnerability to environmental changes using carbon (δ13C) and nitrogen (δ15N) stable isotope ratios to generate trophic models. Using new available data inputs, we generated robust SDM and trophic... |
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Palavras-chave: Fisheries interactions; Sperm whale; Patagonian toothfish; Kerguelen; Depredation. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00592/70389/68471.pdf |
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| Michel, Loic; Danis, Bruno; Dubois, Philippe; Eleaume, Marc; Fournier, Jerome; Gallut, Cyril; Jane, Philip; Lepoint, Gilles. |
| In recent years, sea ice cover along coasts of East Antarctica has tended to increase. To understand ecological implications of these environmental changes, we studied benthic food web structure on the coasts of Adélie Land during an event of unusually high sea ice cover (i.e. two successive austral summers without seasonal breakup). We used integrative trophic markers (stable isotope ratios of carbon, nitrogen and sulfur) to build ecological models and explored feeding habits of macroinvertebrates. In total, 28 taxa spanning most present animal groups and functional guilds were investigated. Our results indicate that the absence of seasonal sea ice breakup deeply influenced benthic food webs. Sympagic algae dominated the diet of many key consumers, and... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00500/61194/64726.pdf |
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