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Meiobenthic communities of the Pomeranian Bay (southern Baltic): effects of proximity to river discharge

Rokicka-Praxmajer J., Radziejewska T., Dworczak H.

Oceanologia

1998

No. 40 (3)

243-260

The Pomeranian Bay (southern Baltic Sea) is a component of the river Oder (Odra) estuarine system. It receives the Oder's discharge once it has passed through the Szczecin Lagoon, a eutrophic and polluted water body. The discharge has been documented as affecting the hydrography of the pelagic domain as well as the sedimentary environments and the macrozoobenthos of the Bay. This study focused on the distribution of meiobenthic communities in the Bay as investigated with the use of a suite of uni- and multivariate analyses applied to data collected at 14 stations in September 1993. Meiobenthic community characteristics (composition and abundance) are presented in relation to sediment properties (grain size, silt/clay and organic matter content), changing with distance from the major riverine discharge site. The communities studied showed a clear distinction between those associated with organic matter-enriched sediments close to the discharge site and the assemblages living in clean sands, away from the discharge. We conclude that the meiobenthos can be regarded as another compartment of the Pomeranian Bay system responding to the River Oder discharge.