The macrozoobenthos investigation carried out in autumn 1994 and summer 1995 along with a review of literature data enabled the author to specify the condition and changes in the bottom macrofauna communities in the Gulf of Gdansk. No substantial changes have been found over the last 30 years. In the 90s, in 1995 in particular, a difficult to interpret increase in abundance and biomass of macrozoobenthos occurred.
The macrobenthos in the Gdansk Basin and southern parts of the Bornholm and Gotland Basins was studied from 1978-1993 to document changes in the structure of benthic communities.Recolonisation following inflows of saline water was observed in the deep bottom habitat.Fluctuaction in microfauna abundance and biomass were recorded in the shallow water habitat, but no trend could be detected.No permanent macrofauna was encountered in the deepest part of the Bornholm and Gdansk Basins.
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