First data on intertidal Bryozoa of the Koni peninsula, Sea of Okhotsk

Examination of the bryozoan collection gathered from three sites within the middle horizon of rocky-boulder intertidal along northwestern shoreline of the Koni Peninsula (Tauyskaya Inlet, Sea of Okhotsk), has revealed ten species. Seven species have been registered for the first time for the northern coast of the Sea of Okhotsk, and five species are new to the bryozoan fauna of this sea. The most abundant are Porella alba Nordgaard, 1906, Cauloramphus multispinosus Grischenko, Dick et Mawatari, 2007, Electra asiatica Grischenko, Dick et Mawatari, 2007 and Cauloramphus magnus Dick et Ross, 1988. All species form encrusting colonies on the hard substrata (rock, pebbles, small boulders). Biogeographically, this fauna represented equally by Boreal-Arctic and Boreal elements. Low overall species diversity of intertidal taxocene combined with a high abundance of the mass species seem to be specific peculiarity for local bryozoan fauna, and is indicating a high dynamics of elimination of colonies as affected by environmental stressors during winter period.