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1 December 2001 THE EFFECTS OF BEAVER-CREATED WETLANDS ON THE BENTHIC MACROINVERTEBRATE ASSEMBLAGES OF TWO APPALACHIAN STREAMS
Brian E. Margolis, Richard L. Raesly, Durland L. Shumway
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Abstract

We examined the effects of beaver impoundments on the benthic macroinvertebrate assemblages of two small Appalachian streams, Mountain Run (Somerset County, Pennsylvania) and a tributary to Herrington Creek (Garrett County, Maryland). Benthic macroinvertebrate assemblages above the impoundments were compared with assemblages within the impoundments and 1 m, 10 m, and 100 m below the impoundments. The results of our study indicate that beaver affect both within-impoundment and downstream benthic macroinvertebrate assemblages. Taxonomic and functional changes in benthic macroinvertebrate assemblages of the beaver-altered streams were a result of direct (impoundment) and indirect (changes in temperature, water chemistry, plant growth) alterations of the stream environment.

Brian E. Margolis, Richard L. Raesly, and Durland L. Shumway "THE EFFECTS OF BEAVER-CREATED WETLANDS ON THE BENTHIC MACROINVERTEBRATE ASSEMBLAGES OF TWO APPALACHIAN STREAMS," Wetlands 21(4), 554-563, (1 December 2001). https://doi.org/10.1672/0277-5212(2001)021[0554:TEOBCW]2.0.CO;2
Received: 15 March 2000; Accepted: 1 August 2001; Published: 1 December 2001
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