Structure and interannual dynamics of Laminaria phytocoenosis in the white sea

摘要

During the period of 1994-1998 the Laminaria digitata+L.saccharina - Odonthalia dentata + Phycodrys rubens phytocoenosis located at the depth of 6-7 m in the region of the Solovetskiye Islands was investigated. The ranges of interannual fluctuations of 10 characteristics of the phytocoenosis are determined, including the species composition, the number of species, species richness, value of the total biomass and those of isolated species, indexes of species diversity of the whole phytocoenosis and its components, density and size-age stucture of kept populations. It is found that the interannual changes in the studied climax phytocoenosis are minute, which testifies to the stability of the phytocoenosis in time.