00000nam 2200000zi 4500 9.868563 CaOODSP 20241203113646 m o d f cr ||||||||||| 190219s2004 onc #ot f|0| 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn-on En13-5/04-207E-PDF Heidtke, Thomas, author. PCB levels and trends within the Detroit River - western Lake Erie basin : a historical perspective of ecosystem monitoring / Thomas Heidtke [and three others]. Burlington, Ontario : National Water Research Institute, Environment Canada, [2004] 1 online resource (11 pages) text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; 04-207 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographic references. "An international workshop held in the spring of 2002 convened a group of technical to address monitoring, modeling, and management of PCBs within the Detroit River - western Lake Erie basin. Participants shared and discussed a diverse set of research data bases pertaining to PCB levels within the region, discussed observed changes different components of the local ecosystem, and identified several primary issues impacting future PCB management strategies. Results presented at the workshop indicate dramatic reductions in PCB contamination levels have been observed in much of study area between the late 1970s and mid-1990s"--Abstract. Includes abstract in French. gccst Water pollution gccst Aquatic ecosystems Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; 04-207. (CaOODSP)9.844121 PDF 1.15 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-04-207-eng.pdf