Variations in lake-outlet Ephemeroptera, Plecoptera, and Trichoptera communities amongst regions of eastern Newfoundland, Canada

• Published in: Canadian Journal of Zoology
• Main Authors: Lomond, T M, Colbo, M H
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 2000
• Subjects: Animal Science and Zoology; Ecology, Evolution, Behavior and Systematics; Canada; Newfoundland
• Online Access: http://dx.doi.org/10.1139/z00-098; http://www.nrcresearchpress.com/doi/pdf/10.1139/z00-098

Ephemeroptera, Plecoptera, and Trichoptera communities at 23 lake-outlet sites in four regions of boreal eastern Newfoundland, Canada, are described and compared. Faunal richness was low, with a total of 51 taxa collected (14 for Ephemeroptera, 3 for Plecoptera, and 34 for Trichoptera). Hydropsychids (Trichoptera) predominated in both diversity and abundance of taxa. Analysis of variance revealed differences in taxon diversity and abundance among regions, even within the relatively small geographic area studied. Diversity and abundance also varied among sites within regions, despite the low diversity and large number of widespread taxa. The data show that lake outlets are useful for comparative studies, even in areas with a reduced insect fauna.