Acta Ichthyologica et Piscatoria 21(S): 41-46, doi: 10.3750/AIP1991.21.S.05
Zooplankton succession in the River Odra estuary
expand article infoC. Chojnacki J.
Open Access
Changes in the dominance structure of zooplankton in the River Odra estuary were studied over the years 1984-1988; samples were collected 4 times a year. Frequency distribution analysis of dominants and subdominants was carried out to outline a hypothetical pattern of succession in the area of study. The following filtrators were found to mainly influence the spatial structure of the zooplankton: Daphnia cucullata, Bosmina coregoni and Bosmina coregoni maritima, the advanced eutrophication of the estuary resulting in abundant food resources in the form of phytoplankton.