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MEPS 238:101-108 (2002)
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Abstract
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Re-evaluation of species diversity patterns of free-living marine nematodes
V. Mokievsky1,*, A. Azovsky2
1P. P. Shirshov Institute of Oceanology RAS, Moscow, Russia
2Moscow State University, Faculty of Biology, Moscow, Russia
*E-mail: vom@soil.msu.ru
ABSTRACT: Nematode species diversity was analysed for 55 data points ranging from local studies to large-scale faunal surveys. Multiple regression analysis uses latitude, investigated area, sampling effort and depth as independent variables. Species
diversity in a biotope (or a-diversity) is about twice as high in the deep sea, while the main source of diversity in shallow waters is heterogeneity of biotopes (b-diversity). For sites deeper than
100 m, regional species richness shows a unimodal (hump-shaped) latitudinal pattern, with the highest diversity at 30° to 60°N. Species diversity in shallow waters does not show any prominent gradients throughout the world ocean. These patterns possibly
reflect the diversity-productivity relationships. Different approaches to estimation of species diversity are discussed.
KEY WORDS: Species diversity · Latitudinal gradients · Marine benthos · Nematodes
Full text in pdf format
Published in MEPS Vol.
238
(2002) on August 8
Print ISSN: 0171-8630; Online ISSN: 1616-1599.
Copyright © Inter-Research, Oldendorf/Luhe, 2002
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