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.
Russian Journal of Marine Biology – Springer Journals
Published: Oct 13, 2004
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