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Distributions of Chironomidae (Insecta: Diptera) and Other Freshwater Midges with Respect to Treeline, Northwest Territories, Canada
Ian R. Walker and Glen M. MacDonald
Arctic and Alpine Research
Vol. 27, No. 3 (Aug., 1995), pp. 258-263
Published by: INSTAAR, University of Colorado
Stable URL: http://www.jstor.org/stable/1551956
Page Count: 6
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The distributions of chironomid, ceratopogonid, and Chaoborus fly remains from 20 lakes in the Northwest Territories were studied with respect to treeline and lake depth. The distributions illustrate the relation between faunal composition and lake depth, the importance of treeline as an ecological boundary for aquatic insects, and the potential value of chironomid head capsules and other aquatic insect remains as proxy indicators of past changes in treeline position and associated limnological and climatological conditions.