Abstract:The effects of river diversion on phytoplankton primary production and biomass in the downstream part of two rivers were studied in relation to physical and chemical variables. These rivers, situated north of the 52nd parallel, are characteristic of oligotrophic systems with phytoplankton primary production less than 10.76 mg C m-2 h-l, chlorophyll -a lower than 3.0 mg m-3 and biomass between 118-1 007 mg m-3. The decrease in flow favored the establishment of an algal biomass approximately two times greater th… Show more
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