Biomonitoring in the revitalization of the upper Wkra River (Nidzica County) on the basis of benthic macroinvertebrates.

摘要

Water quality of the Nida River (NE Poland) was evaluated using the BMWP-PL biotic and diversity indices. Revitalization works were undertaken in the river during the study. Benthic macroinvertebrate samples were collected from seven different sites. Twenty-four taxa in total were recorded. Most of the studied sites (59%) were ranked into water quality class III, while 35% of sites were of poor water quality (class IV). Good water quality (class II) was found at only one site (the upper Nida section). The revitalization works did not significantly change values of the BMWP-PL index at the studied sites.