CHANGES IN TAXONOMIC COMPOSITION OF BENTHIC FLORA UNDER JAPANESE SCALLOP'S MARICULTURE INFLUENCE IN MINONOSOK BIGHT, POSYET BAY
The influence of Japanese Scallop's mariculture on benthic flora composition in Minonosok Bight of Posyet Bay, Sea of Japan has been studied. In 1990th, 104 algal species (green - 21, brown - 25, red - 58) and 4 species of sea grasses were occurred. Taxonomic diversity of the flora was very high. Phylum Chlorophyta included one class, four orders, six families and 11 genera. Class Phaeophyceae of phylum Ochrophyta contained six orders, 11 families and 20 genera. Phylum Rhodophyta included four classes, 16 orders, 30 families and 44 genera. In 2010th, only 54 species of macroalgae were found. The total species number of benthic flora was decreased by 2 times. A numbers of many families and genera were declined. More than one-half of Rhodophyta families were disappeared. Thus, the benthic flora of Minonosok Bight influenced by long-term Japanese Scallop's mariculture is characterized by distinct trend to reducing of species composition and taxonomic diversity in all macrophytes groups.