Биоценоз Anadara kagoshimensis (Tokunaga, 1906) в Керченском проливе (Азово-Черноморский бассейн)

Терентьев, А.С.

Автор: Терентьев А.С.
Журнал: Экосистемы
Номер: 36
Год издания: 2023
Издательство: Федеральное государственное автономное образовательное учреждение высшего образования Крымский федеральный университет им. В.И. Вернадского
Местоположение издательства: Симферополь
Первая страница: 87
Последняя страница: 101
DOI: 10.5281/ZENODO.10374274
Аннотация: A bivalve mollusk Anadara kagoshimensis is a recent invasive species in the Azov and Black Sea Basin, originating from the temperate waters of the Pacific Ocean. It has become one of the dominant species in the Kerch Strait. The biocenosis includes 49 species of animals. The density of species varies from 1 to 24 and averages 8.9±1.2 species/0.1 m2. Crustaceans predominate in terms of species richness. The population ranges from 10 to 1320 individuals, with 80±100 ind./m2 on average. Bivalve mollusks, together with crustaceans, play a key role in the population density of the bioceonosis. The biomass varies from 8 to 1526, with an average of 400±100 g/m2. Bivalve mollusks dominate in biomass.The dominant species, on average, is responsible for 6–13 % of the total abundance and 75–85 % of the total biomass. The highest development level is reached on shelly substrates and the lowest one is observed on sandy substrates. In general, the species composition of the biocoenosis on different substrates is quite similar. The most pronounced difference in the species richness is recorded for the parts of the biocoenosis residing on sandy and shelly bottoms. By 2016, the biocoenosis had expanded over the entire northern area of the Strait; however, it did not spread into the Black Sea. It was formed in the place of Cerastoderma glaucum and Chamelea gallina biocoenosis, characteristic to the Black and Azov Seas. During the transformation of C. glaucum biocoenosis, the species richness decreased by 1.2 times, while its density increased by 2.0–2.4 times. Total abundance of the biocoenosis remained stable. The total biomass increased by 1.9-4.5 times due to the biomass of Anadara kagoshimensis. The transformation of Ch. gallina biocoenosis has resulted in the decrease in the species richness by 3.6 times. Its species density remained virtually unchanged. The total abundance decreased by 2.6–4.2 times, and the total biomass declined by 1.2–1.7 times. The formation of An. kagoshimensis biocenosis in place of C. glaucum biocenosis resulted in the introduction of the invasive species into the pre-existing community, where it took a dominant position. Meanwhile, its formation in the place of the Ch. gallina bioceonosis was accompanied by the destruction of the previous community.
Добавил в систему: Терентьев Александр Сергеевич

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Биоценоз Anadara kagoshimensis (Tokunaga, 1906) в Керченском проливе (Азово-Черноморский бассейн)статья

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