Long-term trends in ecosystem health : quantitative analysis of river benthic invertebrate communities, Peace and Athabasca Rivers / prepared for the Northern River Basins Study under project 2616-C1 by... : R71-49/3-56E-PDF

"The aim of this report is to assess trends in benthic macroinvertebrate community structure in the Peace-Athabasca Rivers. This work forms part of a larger project whose objective is to develop a data base that can be used to assess the cumulative effects of development on the aquatic resources of the Peace-Athabasca River systems. The specific objectives of this report were: (1) to describe and compile existing long-term data sets for the Peace, Athabasca and Slave Rivers, (2) to the extent possible, review benthic sampling procedures used to produce each data set and the sampling deficiencies associated with them, and (3) where appropriate, perform quantitative statistical analyses on the data set to determine whether patterns in benthic community structure are consistent with those predicted impacts from point-source inputs"--Report summary.

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