Periphytic algal biomass as a bioindicator of phosphorus concentrations in agricultural headwater streams of southern Ontario
Algal blooms in Lake Erie have worsened in recent decades and are driven by diffuse export of phospho- rus (P) from a large stream network that drains predominately agricultural land. Given the diffuse nature of nonpoint source pollution, best management practices (BMPs) must… Read More
Landscape characteristics driving spatial variation in total phosphorus and sediment loading from sub-watersheds of the Nottawasaga River, Ontario
Eutrophication from agricultural runoff is a global problem, often resulting in formation of anoxic zones in receiving water bodies. The Nottawasaga River Watershed (NRW) is dominated by agricultural land-use, and drains into Nottawasaga Bay, Georgian Bay (Lake Huron). A… Read More
A test of hypotheses to explain the sigmoidal relationship between total phosphorus and chlorophyll a concentration in Canadian lakes
We tested five hypotheses to explain the sigrnoidal relationship between total phosphorus (TP) and chlorophyll a (Chi a), two assuming that the nonlinearity is an artifact of various measurement biases and three assuming that it is based on underlying ecological interactions. Our… Read More
Assessment of phosphorus limitation in an oligotrophic lake using radiophosphorus uptake kinetics
We used P32-uptake kinetics as a means of assessing periods of P limitation to phytoplankton growth in an ultraoligotrophic lake. Tracer experiments, conducted biweekly and weekly in 1975 and 1976, respectively, yielded information regarding the availability of phosphorus over… Read More