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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
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:
It is part of: Nature Ecology and Evolution, 2018, vol. 2, p. 299-305
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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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