National Swedish Programme for Monitoring of Environmental Quality. Open Sea Program. Report from the activities in 1990

azote benthos bentos chemical contamination chlorophylle chlorophylls clorofilas contamination chimique data collection environmental temperature eutrophication eutrophisation fishes fitoplancton fosfatos hidrocarburos hidrografia humus hydrocarbons hydrocarbure hydrogen sulphide hydrographie hydrography kattegat monitoring nitrogen oceanologia oceanologie oceanology oxygen peces petroleum phosphate phosphates phytoplancton phytoplankton plankton blooms poisson (animal) pollution des mers primary production salinidad salinity sea pollution skagerak substance toxique sulfuro de hidrogeno temperatura ambiente toxic substances vigilancia zooplancton zooplankton