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JOURNAL OF PLANKTON RESEARCH | VOLUME 3 | NUMBER 4 | PAGES 531-549 | 1981
© Oxford University Press

research-article

Biological structure of the Pacific Ocean as compared with two other oceans*

C.W. Beklemishev

Department of Invertebrate Zoology, Biological Faculty, Moscow State University Moscow 117234, USSR

Received on December 1, 1980; accepted on March 1, 1981

Homologous habitats (biotopes, geosystems) are similar to each other in their position among other habitats (biotopes, geosystems) of the whole ocean and in physical processes controlling their formation. In pelagic species with discontinuous ranges, their individual populations live in homologous habitats in 90% of cases. For some species the margin of the Pacific tropical zone is more similar to the equatorial zone of the other two oceans. Due to its size, the Pacific Ocean is characterized by (1) a maximal development of latitudinal zonation in the distribution of species and a suppression of circum-continental zonation; (2) of all the oceans, it has the most developed oceanic zone relative to distant neritic ones and, within it, a well developed equatorial part; and (3) the Pacific east-equatorial distant neritic area is the most developed one.

*An address to the XIV Pacific Science Congress, Khabarovsk, August 1979.


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