Structure of communities associated with dense assemblages of the tube-dwelling polychaete Polydora quadrilobata Jacobi (Spionidae) in the White Sea

摘要: The aim of the investigation was to describe structure benthic communities associated with dense assemblages Polydora quadrilobata Jacobi (Polychaeta: Spionidae). Investigations were carried out in four different areas Kandalaksha and Onega bays White Sea on intertidal subtidal sediments. It shown that community depends density assemblages. Only 21% species found positively correlated abundance. Community differs zones. chironomid Cricotopus vitripennis, gastropod Hydrobia ulvae oligochaete Tubificoides benedeni are communities. Subtidal inhabited by species, including Terebellides stroemi, Scoloplos armiger, Aricidea nolani, Harmothoe imbricata, Eteone longa (Polychaeta), Pontoporeiafemorata (Amphipoda) Macoma balthica (Bivalvia). In all cases P. places strong organic enrichment (dead algae Zostera mats, near mussel beds patches, deep pits). Density such increases rapidly as is typical for opportunistic species. mature several (mostly those planktonic larvae or non-motile species) disappeared.