Metabolic asymmetry and the global diversity of marine predators

Author:

Grady John M.12ORCID,Maitner Brian S.3ORCID,Winter Ara S.4,Kaschner Kristin5ORCID,Tittensor Derek P.67,Record Sydne2ORCID,Smith Felisa A.8ORCID,Wilson Adam M.9ORCID,Dell Anthony I.1011,Zarnetske Phoebe L.1ORCID,Wearing Helen J.812ORCID,Alfaro Brian8ORCID,Brown James H.8

Affiliation:

1. Department of Fisheries and Wildlife and Department of Forestry, Michigan State University, East Lansing, MI, USA.

2. Department of Biology, Bryn Mawr College, Bryn Mawr, PA, USA.

3. Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, USA.

4. Bosque Ecosystem Monitoring Program, University of New Mexico, Albuquerque, NM, USA.

5. Department of Biometry and Environmental Systems Analysis, University of Freiburg, Freiburg im Breisgau, Germany.

6. Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada.

7. UN Environment Programme World Conservation Monitoring Centre, Cambridge, UK.

8. Department of Biology, University of New Mexico, Albuquerque, NM, USA.

9. Department of Geography, State University of New York, Buffalo, NY, USA.

10. National Great Rivers Research and Education Center, East Alton, IL, USA.

11. Department of Biology, Washington University, St. Louis, MO, USA.

12. Department of Mathematics and Statistics, University of New Mexico, Albuquerque, NM, USA.

Abstract

Cold is better for polar predators Generally, biodiversity is higher in the tropics than at the poles. This pattern is present across taxa as diverse as plants and insects. Marine mammals and birds buck this trend, however, with more species and more individuals occurring at the poles than at the equator. Grady et al. asked why this is (see the Perspective by Pyenson). They analyzed a comprehensive dataset of nearly 1000 species of shark, fish, reptiles, mammals, and birds. They found that predation on ectothermic (“cold-blooded”) prey is easier where waters are colder, which generates a larger resource base for large endothermic (“warm-blooded”) predators in polar regions. Science , this issue p. eaat4220 ; see also p. 338

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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