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To evaluate levels of primary production and community metabolism in Lake Erie, we conducted incubations with 18 O-labelled water and determined the ratio of respiration to primary production (R:P) during the summer and early fall of 2002. The epilimnion of Lake Erie was characterized by δ 18 O values less than 0.7‰ at all times that reflects a strong contribution of O 2 from...
Direct measurements of rates of primary production in Lake Erie are few and uncertainties surround rate measurements based on radiocarbon and the light–dark bottle incubation methods. For these reasons, we conducted a series of simultaneous primary productivity measurements in Lake Erie in July and August of 2003, based on incubation with [14C]-NaHCO3, the light–dark bottle method, and incubation...
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