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A global perspective on the trophic geography of sharks

A global perspective on the trophic geography of sharks
A global perspective on the trophic geography of sharks
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.
299-305
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Trueman, Clive N.
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Bird, Christopher S.
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Veríssimo, Ana
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Magozzi, Sarah
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Abrantes, Kátya G.
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Al-reasi, Hassan
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Biais, Gérard
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Brunnschweiler, Juerg
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Carlisle, Aaron
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Ciancio, Javier
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Claes, Julien
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Colaço, Ana
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Courtney, Dean L.
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Cresson, Pierre
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Daly, Ryan
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De Necker, Leigh
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Endo, Tetsuya
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Figueiredo, Ivone
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Hansen, Joan Holst
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Vaudo, Jeremy J.
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Wai, Tak-Cheung
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Wells, R. J. David
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Wyatt, Alex S. J.
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Yool, Andrew
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Trueman, Clive N.
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Bird, Christopher S., Veríssimo, Ana, Magozzi, Sarah, Abrantes, Kátya G., Aguilar, Alex, Al-reasi, Hassan, Barnett, Adam, Bethea, Dana M., Biais, Gérard, Borrell, Asuncion, Bouchoucha, Marc, Boyle, Mariah, Brooks, Edward J., Brunnschweiler, Juerg, Bustamante, Paco, Carlisle, Aaron, Catarino, Diana, Caut, Stéphane, Cherel, Yves, Chouvelon, Tiphaine, Churchill, Diana, Ciancio, Javier, Claes, Julien, Colaço, Ana, Courtney, Dean L., 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, Leaf, Robert, Li, Yunkai, Lorrain, Anne, Madigan, Daniel J., Maljković, Aleksandra, Malpica-cruz, Luis, Matich, Philip, Meekan, Mark G., Ménard, Frédéric, Menezes, Gui M., Munroe, Samantha E. M., Newman, Michael C., Papastamatiou, Yannis P., Pethybridge, Heidi, Plumlee, Jeffrey D., Polo-silva, Carlos, Quaeck-Davies, Katie, Raoult, Vincent, Reum, Jonathan, Torres-rojas, Yassir Eden, Shiffman, David S., Shipley, Oliver N., Speed, Conrad W., Staudinger, Michelle D., Teffer, Amy K., Tilley, Alexander, Valls, Maria, Vaudo, Jeremy J., Wai, Tak-Cheung, Wells, R. J. David, Wyatt, Alex S. J., Yool, Andrew and Trueman, Clive N. (2018) A global perspective on the trophic geography of sharks. Nature Ecology & Evolution, 2 (2), 299-305. (doi:10.1038/s41559-017-0432-z).

Record type: Article

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.

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Bird_et_al_submmission.merged - Accepted Manuscript
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Accepted/In Press date: 28 November 2017
e-pub ahead of print date: 18 January 2018
Published date: 1 February 2018

Identifiers

Local EPrints ID: 417293
URI: http://eprints.soton.ac.uk/id/eprint/417293
PURE UUID: d9f7a662-a680-41b1-b2b8-24d4b1c8f632
ORCID for Clive N. Trueman: ORCID iD orcid.org/0000-0002-4995-736X

Catalogue record

Date deposited: 29 Jan 2018 17:30
Last modified: 16 Mar 2024 03:35

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Contributors

Author: Christopher S. Bird
Author: Ana Veríssimo
Author: Sarah Magozzi
Author: Kátya G. Abrantes
Author: Alex Aguilar
Author: Hassan Al-reasi
Author: Adam Barnett
Author: Dana M. Bethea
Author: Gérard Biais
Author: Asuncion Borrell
Author: Marc Bouchoucha
Author: Mariah Boyle
Author: Edward J. Brooks
Author: Juerg Brunnschweiler
Author: Paco Bustamante
Author: Aaron Carlisle
Author: Diana Catarino
Author: Stéphane Caut
Author: Yves Cherel
Author: Tiphaine Chouvelon
Author: Diana Churchill
Author: Javier Ciancio
Author: Julien Claes
Author: Ana Colaço
Author: Dean L. Courtney
Author: Pierre Cresson
Author: Ryan Daly
Author: Leigh De Necker
Author: Tetsuya Endo
Author: Ivone Figueiredo
Author: Ashley J. Frisch
Author: Joan Holst Hansen
Author: Michael Heithaus
Author: Nigel E. Hussey
Author: Johannes Iitembu
Author: Francis Juanes
Author: Michael J. Kinney
Author: Jeremy J. Kiszka
Author: Sebastian A. Klarian
Author: Dorothée Kopp
Author: Robert Leaf
Author: Yunkai Li
Author: Anne Lorrain
Author: Daniel J. Madigan
Author: Aleksandra Maljković
Author: Luis Malpica-cruz
Author: Philip Matich
Author: Mark G. Meekan
Author: Frédéric Ménard
Author: Gui M. Menezes
Author: Samantha E. M. Munroe
Author: Michael C. Newman
Author: Yannis P. Papastamatiou
Author: Heidi Pethybridge
Author: Jeffrey D. Plumlee
Author: Carlos Polo-silva
Author: Katie Quaeck-Davies
Author: Vincent Raoult
Author: Jonathan Reum
Author: Yassir Eden Torres-rojas
Author: David S. Shiffman
Author: Oliver N. Shipley
Author: Conrad W. Speed
Author: Michelle D. Staudinger
Author: Amy K. Teffer
Author: Alexander Tilley
Author: Maria Valls
Author: Jeremy J. Vaudo
Author: Tak-Cheung Wai
Author: R. J. David Wells
Author: Alex S. J. Wyatt
Author: Andrew Yool

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