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Chemosymbiotic vesicomyids (Bivalvia: Vesicomyidae: Pliocardiinae) from cold seeps of the Sea of Okhotskтезисы доклада
- Авторы: Krylova Elena M., Vladychenskaya Irina P., Galkin Sergey V., Kamenev Gennady M., Ivin Viktor V., Gebruk Andrey V.
- Сборник: Abstracts of the Conference, Mollusks of the Eastern Asia and Adjacent Seas, October 6-8, 2014, Vladivostok
- Тезисы
- Год издания: 2014
- Издательство: DALNAUKA
- Местоположение издательства: UL. RADIO 7, VLADIVOSTOK, RUSSIA, 690041
- Первая страница: 54
- Последняя страница: 55
- Аннотация: Bivalves of the subfamily Pliocardiinae Woodring, 1925 (Vesicomyidae) are among the most prominent components of chemosynthetic communities. All studied pliocardiins are highly specialized molluscs containing within their gills sulphide-oxidizing chemosymbiotic bacteria on which they rely for nutrition. In the Sea of Okhotsk vesicomyids have been described before extensive areas of methane seepage were reported for this region. Four species assigned to four genera were recorded (Scarlato, 1981): Waisiuconcha katsuae (Kuroda in Habe, 1952); Akebiconcha soyoae ochotensis Scarlato, 1981; Archivesica ochotica Scarlato, 1981 and Calyptogena rectimargo Scarlato, 1981. Three of these species were considered as endemics of the Sea of Okhotsk. Interest to these records increased after understanding the chemosymbiotic nature of vesicomyids and their strict association with reducing habitats. Despite the vesicomyids are restricted to reducing environments, many of them have really broad distribution ranges. Using genetical methods it was approved that six species occur in reducing habitats both off Japan and off the North America (Kojima et al., 2004; Audzijonyte et al., 2012), their distribution ranges thus being trans-Pacific. In this context, vesicomyids of the Sea of Okhotsk are of a special interest since they are endemics of the sea or part of broadly distributed Pacific fauna. During the 61st cruise of the RV “Akademik M.A. Lavrentyev”, extensive material on two vesicomyid species, A. soyoae ochotensis and A. ochotica, was collected. Preliminary morphological and molecular data show that at least A. soyoae ochotensis is widely distributed occurring both in the western and eastern regions of the Pacific. It was shown that in spite of co-occurring of these species on a large scale, they differ in microdistribution patterns and this is related to narrow ecological niche specialization. A. ochotica does not form large aggregations, it is more mobile and seemingly prefers habitats with soft sediment and higher sulphide level. In contrast, A. soyoae ochotensis often lives in dense clusters, in more solid sediment and at sites with presumably lower methane fluxes.
- Добавил в систему: Петров Николай Борисович