The use of easy measurable variables in the sediment to assess impact in marine sediments affected by organic wastes (1978-2010)

摘要

The assessment of impact in sediments is feasible fitting easy measurable variables like organic matter content, chlorophyllic pool pigments and elementary analysis of C and N. From these data several indexes reveal clearly the quality of the sediment in terms of potential primary production and flow of energy and organic matter degradability in sedimentary microecosystems. The sampling campaigns carried out since 1978 in Placeres (Pontevedra, Spain) allow to compare data after several improvements in the environmental management, and to compare the current state of the system with values obtained in other sites non affected by pulp-mill factories wastes. Data have been used to perform an useful model to assess impact of the organic wastes on sediments, to be applied easily and expressed as percentage of disruption related to the control reference system.