Collected reprints: Abstract 3560

Collected reprints

Abstract

Bakker, C.; Phaff, W.J.; van Ewijk-Rosier, M.; De Pauw, N. (1977). Copepod biomass in an estuarine and a stagnant brackish environment of the S.W. Netherlands. Hydrobiologia 52(1): 3-13

In the mesohaline zone of the Westerschelde estuary Eurytemora affinis is the dominant copepod, demonstrating large biomass values nearly throughout the year. In the meso-polyhaline Lake Veere Acartia tonsa is abundant, mainly during summer. In spring a small population of Eurytemora americana is found. The tidal estuary harboured far denser copepod populations throughout the year than the stagnant brackish lake water. The average yearly copepodid + adult biomass in the Westerschelde estuary was approx. 850 mg/m³ (wet weight), in Lake Veere approx. 130 mg/m³. Temporarily low oxygen values did not influence negatively the copepod populations in the Westerschelde estuary. The seasonal distribution of the dominant copepods in both areas is explained in the light of recent literature data. Perennial Eurytemora affinis abundance in the Westerschelde estuary must be mainly caused by large concentrations of nannodetritus particles, bacteria included, throughout the year. Acartia tonsa in Lake Veere has to thrive mainly on nannophytoplankton.

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