Effect Of Polychaete Bioturbation On Sediment-water Fluxes
Of Pyrene Or Cadmium
Author(s)
0. Andersen, A.D. Rasmussen, K. Timmmermann, M. Christensen
& G. Banta
Abstract
Effect of polychaete bioturbation on
sediment-water fluxes of pyrene or cadmium
O. Andersen, A. D. Rasmussen, K. Timmermann, M. Christensen
& G. Banta
Department of Life Sciences and Chemistry,
Roskilde University, Roskilde, Denmark
Abstract
The fate of persistant organic or inorganic pollutants in marine ecosystems
depends on their physicochemical characteristics. Due to hydrophobicity or
particle reactivity, net fluxes are often from water to sediment. As a result,
sediment pollutant concentrations may be orders of magnitude higher than
concentrations in water. The sediment-water kinetics and sediment distribution
of pollutants are further influenced by biotic factors as infaunal bioturbartion.
We have studied effects of polychaete bioturbation on the fluxes of cadmium and
pyrene from sediment to water and vice versa, as well as on their sediment
distribution: Irrigation extensively increased Cd^ flux from water to sediment,
and reduced Cd^ flux from sediment to water. However
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