Abstract
Abstract Studies of the benthic macrofauna (both quantitative and qualitative) conducted in the Skagerrak and Kattegat over a period of many years together with comparisons made with data collected in 1914 have led to the conclusion that the area is undergoing eutrophication. The general increase in biomass and densities of macrofauna has been attributed to an increased supply of degradable organic matter to the sediment. In this study, the effect of eutrophication on benthic Foraminifera is shown in a comparison of foraminiferal data from Recent sediment layers (the upper 2 cm of short sediment cores) with layers deposited more than 42 years B.P. (24–25 cm core interval). Foraminiferal densities are significantly lower in the Recent sediment with no large scale changes in the assemblage composition. It is proposed that the lower densities are a result of increased macrofaunal activity. The (paleo) environmental significance of this interrelated effect of food availability and biological interactions on f...
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