Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/123344
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Type: Journal article
Title: A global perspective on the trophic geography of sharks
Author: Bird, C.S.
Veríssimo, A.
Magozzi, S.
Abrantes, K.G.
Aguilar, A.
Al-Reasi, H.
Barnett, A.
Bethea, D.M.
Biais, G.
Borrell, A.
Bouchoucha, M.
Boyle, M.
Brooks, E.J.
Brunnschweiler, J.
Bustamante, P.
Carlisle, A.
Catarino, D.
Caut, S.
Cherel, Y.
Chouvelon, T.
et al.
Citation: Nature Ecology and Evolution, 2018; 2(2):299-305
Publisher: Nature Research
Issue Date: 2018
ISSN: 2397-334X
2397-334X
Statement of
Responsibility: 
Christopher S. Bird, Ana Veríssimo, Sarah Magozzi, Kátya G. Abrantes, Alex Aguilar ... Samantha E. Munroe ... et al.
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.
Keywords: Muscle, Skeletal; Animals; Sharks; Phytoplankton; Carbon Isotopes; Ecosystem; Food Chain; Oceans and Seas
Rights: © 2018 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
RMID: 1000013803
DOI: 10.1038/s41559-017-0432-z
Appears in Collections:Environment Institute publications

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