00000nam 2200000zi 4500 9.873971 CaOODSP 20241203113649 m o d f cr |n||||||||| 190530s1990 onca #ot f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn-ab En13-5/90-05E-PDF Manning, Philip G., author. Intensive vivianite formation in the bottom sediments of mesotrophic Narrow Lake, Alberta / Philip G. Manning, Thomas P. Murphy and Ellie E. Prepas. Burlington, Ontario : Lakes Research Branch, National Water Research Institute, [1990] 1 online resource (37 unnumbered pages) : figures. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; no. 90-05 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "Narrow Lake is a small, deep, clear lake of significant recreational value, located 140 km north of Edmonton, Alberta. Low phosphate and chlorophyll levels are indicative of a mesotrophic lake, in marked contrast to the highly eutrophic character of most prairie lakes. Remarkably, the bottom sediments have the phosphorus content of low-grade fertilizer. Iron-rich groundwaters seeping into deeper water cause precipitation of phosphorus and deposition to the sediments, rendering the phosphorus unavailable for algal growth. This natural control of trophic level by iron suggests that steel mill pickle liquor waste could find application in lake restoration"--Management Perspective. Includes abstract in French. gccst Sediments gccst Lakes gccst Water pollution Murphy, Tom, author. Prepas, E. E. (Ellie E.), 1947- author. Canada. Environment Canada. National Water Research Institute (Canada). Lakes Research Branch. NWRI contribution ; no. 90-05. (CaOODSP)9.844121 PDF 2.03 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-90-05-eng.pdf