00000nam 2200000za 4500 9.849772 CaOODSP 20241203113641 cr ||||||||||| 180110s1986 onca|||fob f000 0 eng d CaOODSP eng eng fre n-cn--- En13-5/86-138E-PDF Knowles, R. (Roger) Nitrification, a significant cause of oxygen depletion under winter ice [electronic resource] / by Roger Knowles and David R.S. Lean. Burlington, Ont. : National Water Research Institute, [1986]. 23, [4] p. : ill. NWRI contribution series ; no. 86-138 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references: p. 14-17. "Changes in concentrations of oxygen and the various nitrogenous forms in Lake St. George from 1976 to 1964 showed that nitrification (conversion of ammonium to nitrite and nitrate) caused an average of 71% of the winter oxygen depletion.This represents the most significant biological processes in the winter months. In fact, it is 30 X greater than plant photosynthesis. Bottle bioassays for nitrification were evaluated to determine how well they would predict rates measured in the lake itself"--Management perspective. Includes abstract and management perspective in French. gccst Water quality gccst Lakes gccst Ecology Lean, David R. S. Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; no. 86-138 (CaOODSP)9.844121 PDF 1.68 MB https://publications.gc.ca/collections/collection_2018/eccc/En13-5-86-138-eng.pdf