Abstract
The benthic fauna of 41 nonhumic, soft water lakes situated north of lakes Superior and Huron were sampled during 1980. The pH range of the lakes sampled was 4.6 to 7.7. The benthic infauna displayed regional differences in abundance and composition, with large variation within each district. Total abundance, biomass, and number of taxa were not correlated with lake pH or alkalinity. The Chironomidae displayed a slight change in percent composition of the major species (p < 0.2) with lower pH. The Tanytarsini andChironomus salinarius group decreased, whileC. anthracinus group increased in relative abundance in those lakes with lower pH. Other factors appear to control the distribution of the various invertebrate orders, with depth and sediment nature being important variables.
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Dermott, R., Kelso, J.R.M. & Douglas, A. The benthic fauna of 41 acid sensitive headwater lakes in North Central Ontario. Water Air Soil Pollut 28, 283–292 (1986). https://doi.org/10.1007/BF00583494
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DOI: https://doi.org/10.1007/BF00583494