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SHAW, M.A., I.J. DAVIES, E.A. HAMILTON, A. KEMP, R. REID, P.M. RYAN, N. WATSON, W. WHITE, K.M. MURPHY, 1995. The DFO National LRTAP Biomonitoring Programme : baseline characterization 1987-1989. Can. Tech. Rep. Fish. Aquat. Sci., 2032, 63 p .
This report summarizes 3 years of baseline data (1987-89) from 36 lakes and 21 rivers across eastern Canada. These sites are sampled annually as part of the Long Range Transport of Atmospheric pollutants (LRTAP) Biomonitoring Programme. This programme was initiated to monitor the response of sensitive lakes and rivers to expected decreases in sulphate deposition resulting from emission controls. The sites are distributed across a gradient in sulphate deposition (11 to 51 meq•m-2, and range in pH and alkalinity from 4.3 to 7.6, and -70 to 166 µeq•L-1, respectively. They are among the most sensitive lakes and rivers of each region. The purpose of this report is to characterize the fish and benthic communities and assess the magnitude of annual variability in species composition and relative abundance. Several differences in the biotic communities of acidic and neutral systems were evident : acidic systems had fewer benthic and fish taxa, a higher proportion of dipterans, and few if any of several acid sensitive taxa. However, the relative abundance of fish in acidic lakes was ≥ than that in neutral lakes. Variability in aquatic communities was very high. Up to 30 % of fish species were not caught in a lake in a given year. The gross flux of benthic taxa ranged from 57 to 131 %, from one year to the next although net flux was much closer to 0. Variability in lake fish community CUE averaged 50 % (4 to 131 %) of the mean. The annual variability in acidic lakes, however, was twice that of neutral lakes. Bioassays conducted in Québec and Nova Scotian rivers confirmed the deleterious effects of seasonal pH depression on salmonid populations. Future reports will build on this baselin data to identify trends in fish and benthic communities. These results emphasize the need for long-term monitoring to distinguish between natural variability inherent in aquatic systems and that induced by anthropogenic stress.
SHAW, M.A., S. GEILING, S. BARBOUR, I.J. DAVIES, E.A. HAMILTON, A. KEMP, R. REID, P.M. RYAN, N. WATSON, W. WHITE, 1992. The Department of Fisheries and Oceans National LRTAP Biomonitoring Programme : site locations, physical and chemical characteristics ; Le Programme national de biosurveillance du TADPA du Ministère des Pêches et des Océans : emplacements et caractéristiques physiques et chimiques des sites. Can. Tech. Rep. Fish. Aquat. Sci. ; Rapp. tech. can. sci. halieut. aquat., 1875, 87 p .
This report provides documentation of the lake and river sites which constitute the Department of Fisheries and Oceans (DFO) national LRTAP biomonitoring programme. Summaries of physical and chemical features are provided for 36 lakes and 21 rivers in Ontario, Quebec, Nova Scotia and Newfoundland. A map of each region gives the location of each lake and river. These are followed by brief regional descriptions, site access, and lake or river physical, chemical and biological characteristics. references to more detailed information are also provided. Individual lake and river maps indicate the sampling stations and what type of data is collected at each. All lakes, rivers and sampling stations are annotated wiht unique codes which conform to national data base standards.
KEMP, A., 1991. Biomonitoring program : Quebec Region, 1990-91. Pages 160-176 in D.A. Scruton et al (ed.). Proceedings of the 5th Annual Department of Fisheries and Oceans LRTAP Workshop, Battery Hotel, October 9-11, 1990, St-John's, Newfoundland .
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