CGRG Bibliography of Canadian Geomorphology
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Author : Duthie, H.C.
Date : 1979
Title : Liminology of subarctic Canadian Lakes and some effects of impoundment
Publication : Arctic and Alpine Research
Issue : 11(2):
Page(s) : 145-158
Abstract
Of 620 taxa of algae found in and around western Labrador lakes about 400 are planktonic, and many of these plankters are small delicate flagellates. Chlorophyceae and Bacillariophyceae are the best represented classes. The most widespread species in subarctic lakes is the chrysophyte Dinobryon bavaricum , followed by several diatoms such as Melosira islandica, Asterionella formosa, Cyclotella glomerata and Rhizosolenia eriensis . Large lakes show a seasonal unimodal phytoplankton maximum of generally under 500 mg/mSUP-3 in late summer and consisting mainly of diatoms; in smaller lakes the seasonal maximum is less well defined or non-existent and Chrysophyceae are relatively more important. Primary production in subarctic Labrador lakes ranges between 8 and 16 gC/mSUP-2 /yr. In shallow lakes there is probably a significant contribution from periphyton production. Heterophilic production may be significant in subarctic lakes; in Labrador lakes heterotrophically fixed carbon contributes 18 to 27% of the phytoplankton primary production. The impact of flooding on some physical and chemical parameters in the formation of Smallwood Reservoir, Labrador, is summarized.
Bibliography of Canadian Geomorphology