THE ECOLOGY OF SUBARCTIC MOLLUSCS IN THE LOWER NELSON RIVER SYSTEM, MANITOBA, CANADA

• Published in: Journal of Molluscan Studies
• Main Author: PIP, EVA
• Format: Text
• Language: English
• Published: Oxford University Press 1992
• Subjects: Articles; Canada; Nelson River; permafrost; Subarctic
• Online Access: http://mollus.oxfordjournals.org/cgi/content/short/58/2/121; https://doi.org/10.1093/mollus/58.2.121

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.