The species composition and distribution of ostracods were investigated at two sites with different pollution levels on the eastern coast of Amurskii Bay within the limits of Vladivostok City. A total of 41 species were found. In all, thirty-eight species (28 of them alive) were found at the first site between Krasnyi and Groznyi capes. Another twenty-seven species were found at a depth of 1.5–3 m in the phytal zone with a diversity of microbiotopes. As the bottom became increasingly silty and the depth increased, the number of species decreased. A total of 25 species (only 15 of them alive) were found at the mouth of the Vtoraya Rechka River, which is heavily polluted by municipal and industrial sewage discharge. No valves of ostracods were found in surface sediments on silts at a depth down to 5.5m. At 4 m, only 2 species were found alive on stones overgrown with Saccharina japonica. At 500 m from a sewage discharge site, few ostracod valves were found that seemed to have died recently. At a distance of over 1 km, an ostracod assemblage typical of the silty substrates of Amurskii Bay was found below a 7 m depth (21 species, 12 of them alive).
Russian Journal of Marine Biology – Springer Journals
Published: Sep 4, 2009
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