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http://hdl.handle.net/2445/120429
Title: | A global perspective on the trophic geography of sharks |
Author: | Bird, Christopher S. Veríssimo, Ana Magozzi, Sarah Abrantes, Kátya G. Aguilar, Àlex Al-Reasi, Hassan Barnett, Adam Bethea, Dana M. Biais, Gérard Borrell Thió, Assumpció Bouchoucha, Marc Boyle, Mariah Brooks, Edward J. Brunnschweiler, Juerg Bustamante, Paco Carlisle, Aaron Catarino, Diana Caut, Stephane Cherel, Yves Chouvelon, Tiphaine Churchill, Diana Ciancio, Javier Claes, Julien Colaço, Ana Courtney, Dean Cresson, Pierre Daly, Ryan de Necker, Leigh Endo, Tetsuya Figueiredo, Ivone Frisch, Ashley J. Hansen, Joan Holst Heithaus, Michael Hussey, Nigel E. Iitembu, Johannes Juanes, Francis Kinney, Michael J. Kiszka, Jeremy J. Klarian, Sebastian A. Kopp, Dorothée |
Keywords: | Taurons Biologia marina Ecosistemes Sharks Marine biology Biotic communities |
Issue Date: | 18-Jan-2018 |
Publisher: | Nature Publishing Group |
Abstract: | Sharks are a diverse group of mobile predators that forage across varied spatial scales and have the potential to influence food web dynamics. The ecological consequences of recent declines in shark biomass may extend across broader geographic ranges if shark taxa display common behavioural traits. By tracking the original site of photosynthetic fixation of carbon atoms that were ultimately assimilated into muscle tissues of 5,394 sharks from 114 species, we identify globally consistent biogeographic traits in trophic interactions between sharks found in different habitats. We show that populations of shelf-dwelling sharks derive a substantial proportion of their carbon from regional pelagic sources, but contain individuals that forage within additional isotopically diverse local food webs, such as those supported by terrestrial plant sources, benthic production and macrophytes. In contrast, oceanic sharks seem to use carbon derived from between 30° and 50° of latitude. Global-scale compilations of stable isotope data combined with biogeochemical modelling generate hypotheses regarding animal behaviours that can be tested with other methodological approaches. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1038/s41559-017-0432-z |
It is part of: | Nature Ecology and Evolution, 2018, vol. 2, p. 299-305 |
URI: | http://hdl.handle.net/2445/120429 |
Related resource: | https://doi.org/10.1038/s41559-017-0432-z |
ISSN: | 2397-334X |
Appears in Collections: | Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals) Articles publicats en revistes (Institut de Recerca de la Biodiversitat (IRBio)) |
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676175.pdf | 5.15 MB | Adobe PDF | View/Open |
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