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dc.contributor.authorLeclerc, Jean-Charles
dc.contributor.authorde Bettignies, Thibaut
dc.contributor.authorde Bettignies, Florian
dc.contributor.authorChristie, Hartvig C
dc.contributor.authorFranco, João N
dc.contributor.authorLeroux, Cédric
dc.contributor.authorDavoult, Dominique
dc.contributor.authorPedersen, Morten F
dc.contributor.authorFilbee-Dexter, Karen
dc.contributor.authorWernberg, Thomas
dc.date.accessioned2021-09-29T10:21:13Z
dc.date.available2021-09-29T10:21:13Z
dc.date.created2021-07-22T09:12:40Z
dc.date.issued2021
dc.identifier.citationOecologia. 2021, 196 441-453.
dc.identifier.issn0029-8549
dc.identifier.urihttps://hdl.handle.net/11250/2785968
dc.description.abstractAs the environment is getting warmer and species are redistributed, consumers can be forced to adjust their interactions with available prey, and this could have cascading effects within food webs. To better understand the capacity for foraging flexibility, our study aimed to determine the diet variability of an ectotherm omnivore inhabiting kelp forests, the sea urchin Echinus esculentus, along its entire latitudinal distribution in the northeast Atlantic. Using a combination of gut content and stable isotope analyses, we determined the diet and trophic position of sea urchins at sites in Portugal (42° N), France (49° N), southern Norway (63° N), and northern Norway (70° N), and related these results to the local abundance and distribution of putative food items. With mean estimated trophic levels ranging from 2.4 to 4.6, omnivory and diet varied substantially within and between sites but not across latitudes. Diet composition generally reflected prey availability within epiphyte or understorey assemblages, with local affinities demonstrating that the sea urchin adjusts its foraging to match the small-scale distribution of food items. A net “preference” for epiphytic food sources was found in northern Norway, where understorey food was limited compared to other regions. We conclude that diet change may occur in response to food source redistribution at multiple spatial scales (microhabitats, sites, regions). Across these scales, the way that key consumers alter their foraging in response to food availability can have important implication for food web dynamics and ecosystem functions along current and future environmental gradients.
dc.language.isoeng
dc.titleLocal flexibility in feeding behaviour and contrasting microhabitat use of an omnivore across latitudes
dc.typePeer reviewed
dc.typeJournal article
dc.description.versionacceptedVersion
dc.source.pagenumber441-453
dc.source.volume196
dc.source.journalOecologia
dc.identifier.doi10.1007/s00442-021-04936-5
dc.identifier.cristin1922386
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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