caa a22 4500 469106506 CHVBK 20180323133058.0 cr unu---uuuuu 170328e19920601xx s 000 0 eng 10.1007/BF00044041 doi (NATIONALLICENCE)springer-10.1007/BF00044041 Towards defining aquatic ecosystem health for the Great Lakes [Elektronische Daten] [John hartig, Michael Zarull] The Canada — U.S. Great Lakes Water Quality Agreement defines Areas of Concern as geographic areas that fail to meet the general or specific objectives of the Great Lakes Water Quality Agreement where such failure has caused or is likely to cause impairment of beneficial use or the area's ability to support aquatic life. Impairment of beneficial use is defined by the Agreement as a change in the physical, chemical or biological integrity sufficient to cause any one of 14 designated use impairments. In 1987 the International Joint Commission's Great Lakes Water Quality Board (GLWQB) recommended that criteria be developed to determine when ecosystem conditions have been impacted enough to warrant designation as an Area of Concern and when conditions have improved sufficiently to be delisted. Based on scientific input and policy considerations, the GLWQB adopted, in principle, a set of quantitative and qualitative listing/delisting criteria for each of the 14 use impairments. These criteria can be uniformly applied throughout the basin. Further, the GLWQB recommended future refinement of these criteria based on advances in science and public input. Kluwer Academic Publishers, 1992 Great Lakes nationallicence impairment of beneficial uses nationallicence hartig John International Joint Commission, 100 Ouellette Avenue, N9A 6T3, Windsor, Ontario, Canada aut Zarull Michael National Water Research Institute, Lakes Research Branch, 867 Lakeshore Road, L7R 4A6, Burlington, Ontario, Canada aut Journal of Aquatic Ecosystem Health Kluwer Academic Publishers 1/2(1992-06-01), 97-107 0925-1014 1:2<97 1992 1 10813 https://doi.org/10.1007/BF00044041 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00044041 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- hartig John International Joint Commission, 100 Ouellette Avenue, N9A 6T3, Windsor, Ontario, Canada aut NATIONALLICENCE 700 1- Zarull Michael National Water Research Institute, Lakes Research Branch, 867 Lakeshore Road, L7R 4A6, Burlington, Ontario, Canada aut NATIONALLICENCE 773 0- Journal of Aquatic Ecosystem Health Kluwer Academic Publishers 1/2(1992-06-01), 97-107 0925-1014 1:2<97 1992 1 10813 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer