00000nam 2200000za 4500 9.847894 CaOODSP 20241203113640 cr ||||||||||| 171128s1985 onca|||fo f000 0 eng d CaOODSP eng eng fre n-cn-on x7x8 En13-5/85-39E-PDF Painter, Scott. Reduction of Cladophora biomass and tissue phosphorus in Lake Ontario, 1972-1983 [electronic resource] / D.S. Painter and G. Kamaitis. Burlington, Ont. : Aquatic Ecology Division, National Water Research Institute, Canada Centre for Inland Waters, [1985]. 14 p. : ill. NWRI ; 85-39 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "Cladophora biomass and tissue phosphorus concentrations at seven sites in Lake Ontario have decreased from 1972 to 1983 in response to phosphorus control programs introduced in the early 70's. The lakewide average dry weight was 205.8, 80.0 and 85.0 grams per square meter for 1972, 1982 and 1983 respectively. The 1972 Iakewide average tissue phosphorus was 0.492; the 1982 lakewide average was 0.26% P and the 1983 lakewide average was 0.201 P on an ash-free dry weight basis (AFDW). The 1972 tissue phosphorus concentrations did not limit growth, but tissue phosphorus had begun to limit growth in 1983. Predicted net production for the six week sampling period in 1983 was 1.7 times greater in the western end of the lake compared to the remote site in the eastern end of Lake Ontario due to higher phosphate concentrations in the west"--Abstract. Includes abstract and management perspective in French. gccst Water plants gccst Water quality Kamaitis, G. Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; no. 85-39 (CaOODSP)9.844121 PDF 1.07 MB https://publications.gc.ca/collections/collection_2017/eccc/En13-5-85-39-eng.pdf