THE ECOLOGY OF SUBARCTIC MOLLUSCS IN THE LOWER NELSON RIVER SYSTEM, MANITOBA, CANADA
- 1 January 1992
- journal article
- Published by Oxford University Press (OUP) in Journal of Molluscan Studies
- Vol. 58 (2) , 121-126
- https://doi.org/10.1093/mollus/58.2.121
Abstract
A total of 18 stream habitats were sampled on the Lower Nelson River system within the area bounded by 56°10'—50'N and 93°50'—94°50'W, where discontinuous permafrost is present. Thirteen gastropod species were found, with a mean community species richness of 3.4. Gastropod richness was adversely affected by hydroelectric dams, but was positively correlated with macrophyte richness and proportion of clay in the sediments. Some interspecific associations were evident. Species proportions in communities were related to sediment particle size, which reflected amount of turbulence. Young were recruited into the populations until mid-September.Keywords
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