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Benthic macroinvertebrate assemblages, water chemistry variables and environmental degradation were investigated in an Atlantic Forest region in Brazil. Seven sites of the Guapimirim river basin were studied during three sampling periods based on the rain regime: end of wet season (May 1998), dry season (August 1998), and wet season (January 1999). Four substrates were collected at each site: sand,...
Benthic macroinvertebrates samples were collected in spring and autumn 2000. Fifteen streams in southern Sweden were sampled twice both for chemical, physical, and biological parameters. Eighty-four macroinvertebrate `single' metrics were calculated and tested for their ability of detecting organic pollution of streams. A comparison of the `best' single metrics with two multimetric indices was also...
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