Environmental controls on the geographic distribution of zooplankton diversity

Scott Rutherford (), Steven D'Hondt and Warren Prell
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Scott Rutherford: Graduate School of Oceanography, University of Rhode Island
Steven D'Hondt: Graduate School of Oceanography, University of Rhode Island
Warren Prell: Geological Sciences, Brown University

Nature, 1999, vol. 400, issue 6746, 749-753

Abstract: Abstract Proposed explanations for the geographic distribution of zooplankton diversity include control of diversity by geographic variation in: physical and chemical properties of the near-surface ocean1,2,3; the surface area of biotic provinces4; energy availability5; rates of evolution and extinction6; and primary productivity7. None of these explanations has been quantitatively tested on a basin-wide scale. Here we used assemblages of planktic foraminifera from surface sediments to test these hypotheses. Our analysis shows that sea-surface temperature measured by satellite8 explains nearly 90% of the geographic variation in planktic foraminiferal diversity throughout the Atlantic Ocean. Temperatures at depths of 50, 100 and 150 m (ref. 9) are highly correlated to sea-surface temperature and explain the diversity pattern nearly as well. These findings indicate that geographic variation in zooplankton diversity may be directly controlled by the physical structure of the near-surface ocean. Furthermore, our results show that planktic foraminiferal diversity does not strictly adhere to the model of continually decreasing diversity from equator to pole. Instead, planktic foraminiferal diversity peaks in the middle latitudes in all oceans.

Date: 1999
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DOI: 10.1038/23449

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