New Phase of Succession of the Bivalve Abra ovata Community in Sulaksii Bay, the Caspian Sea

New Phase of Succession of the Bivalve Abra ovata Community in Sulaksii Bay, the Caspian Sea The study of the Abra ovata community existing on the flooded area of Sulakskii Bay in the Caspian Sea since the mid-1980s was continued. It was found that the pioneer species A. ovata and Cerastoderma glaucum still dominate in the community structure and define the course of succession despite a reduction in their population density and frequency of occurrence. The species composition and structure of the modern A. ovata community and the processes occurring in it are similar to the climax stage of the A. ovata community in the Middle Caspian Sea. Both mollusk species exhibit seasonal variations in number, which are due to predation by sturgeon and natural mortality. A steady annual decrease in the sea level, retreat of the water's edge by 80–100 m, and mass burial of the shells of bivalve mollusks in the drying-out innermost part of the bay were observed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Marine Biology Springer Journals

New Phase of Succession of the Bivalve Abra ovata Community in Sulaksii Bay, the Caspian Sea

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Publisher
Springer Journals
Copyright
Copyright © 2002 by MAIK "Nauka/Interperiodica"
Subject
Life Sciences; Freshwater & Marine Ecology
ISSN
1063-0740
eISSN
1608-3377
D.O.I.
10.1023/A:1021861416892
Publisher site
See Article on Publisher Site

Abstract

The study of the Abra ovata community existing on the flooded area of Sulakskii Bay in the Caspian Sea since the mid-1980s was continued. It was found that the pioneer species A. ovata and Cerastoderma glaucum still dominate in the community structure and define the course of succession despite a reduction in their population density and frequency of occurrence. The species composition and structure of the modern A. ovata community and the processes occurring in it are similar to the climax stage of the A. ovata community in the Middle Caspian Sea. Both mollusk species exhibit seasonal variations in number, which are due to predation by sturgeon and natural mortality. A steady annual decrease in the sea level, retreat of the water's edge by 80–100 m, and mass burial of the shells of bivalve mollusks in the drying-out innermost part of the bay were observed.

Journal

Russian Journal of Marine BiologySpringer Journals

Published: Oct 13, 2004

References

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