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RESPONSES OF PELAGIC MICROORGANISMS 
TO CONTAMINATION BY POLLUTED SEDIMENTS



I
t is now well recognized that the risk of environmental contamination by chemical pollutants is particularly high in coastal environments where past, present and forecasted demographic increases, are amplifying the pressures in these ecosystems. Unraveling the links between contamination pressure and living organisms is a key feature in environmental manageme
nt of anthropogenic ecosystems. In coastal seas and lagoons, sediment act as a sink for contaminants, however, this storage is not definitive, particulate-bound pollutants may be remobilized into the water column.

This potential of remobilization for pollutants is a major problem for an anthropogenic ecosystem because even the anthropogenic source of pollution is identified and stopped; contaminated sediments represent a non-negligible pollution source that can severely affect the ecosystemic services. It is therefore a major of concern to
take into account this potential source of pollution in the management of coastal anthropogenic ecosystems.

During a resuspensi
on of contaminated sediments, a trail of pollutants can be released (metals, organic compounds, nutrients), sometimes in trace levels; which nevertheless may have significant effects on diversity and function for the pelagic communities.