00000nam 2200000zi 4500 9.868622 CaOODSP 20241203113646 m o d f cr ||||||||||| 190220s2004 onc #ot f|0| 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn-on En13-5/04-167E-PDF Charlton, Murray N., author. Review of thirty years of change in Lake Erie water quality / M. N. Charlton and J. E. Milne. Burlington, Ontario : National Water Research Institute, [2004] 1 online resource (17, 9 pages): figures. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; 04-167 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographic references. "Three main events have occurred since the beginning of popular environmental interest in Lake Erie over 30 years ago. First, the near demise of the walleye in the 1950s and 1960s, resulted in development of fisheries management techniques to ensure recovery and attempt sustainability. Second, loadings of toxic chemicals and phosphorus were controlled under the Canada-U.S. Great Lakes Water Quality Agreement (GLWQA). Third, an invasion of exotic species became apparent in the 1980s and continues today"--Abstract. Includes abstract in French. gccst Lakes gccst Water quality gccst Water pollution Milne, Jacqui, author. Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; 04-167. (CaOODSP)9.844121 PDF 1.71 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-04-167-eng.pdf