00000nam 2200000zi 4500 9.870618 CaOODSP 20241203113647 m o d f cr bn||||||||| 190326s1991 onca ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn-on x8x8 En13-5/91-16E-PDF Barica, J., author. Deformation of the nitrogen cycle in a lake receiving excessive loadings of ammonia / J. Barica. Burlington, Ontario : National Water Research Institute = Institut national de recherche sur les eaux, [1991] 1 online resource (10 unnumbered pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; no. 91-16 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "The seasonal cycles of dissolved nitrogen forms in Hamilton Harbour, an embayment of Lake Ontario receiving treated effluents from a population of over 400,000 and industries, appear to be deformed by the excessive loadings of ammonia which possibly inhibit the nitrification process, particularly the formation of nitrate. The intermediate process (i.e., the production of nitrite) appears to be more responsive and less inhibited. While concentrations of ammonia vary between overload levels of 4-10 mg/L (as N) to values close to zero, the temporal variability of nitrate concentrations is less pronounced (1.5-2.5 mg/L as N). Algal uptake is assumed to be the major factor governing the ammonia regime rather than nitrification, which does not appear to be proportional to ammonia losses and may be inhibited by extremely high ammonia levels"--Abstract. Includes management perspective and abstract in French. Nitrogen cycle Ammonia gccst Water pollution gccst Lakes Canada. Environment Canada. National Water Research Institute (Canada). Lakes Research Branch. National Water Research Institute (Canada) NWRI contribution ; no. 91-16. (CaOODSP)9.844121 PDF 1.32 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-91-16-eng.pdf