thumbnail

Behavioral and catastrophic drift of invertebrates in two streams in northeastern Wyoming

Open-File Report 80-1101

By:
and

Links

Abstract

Invertebrate drift samples were collected in August 1977 from two streams in the Powder River structural basin in northeastern Wyoming. The streams are Clear Creek, a mountain stream, and the Little Powder River, a plains stream. Two major patterns of drift were recognized. Clear Creek was sampled during a period of normal seasonal conditions. High drift rates occurred during the night indicating a behavioral drift pattern that is related to the benthic invertebrate density and carrying capacity of the stream substrates. The mayfly genes Baetis, a common drift organism, dominated the peak periods of drift in Clear Creek. The Little Powder River has a high discharge during the study period. Midge larvae of the families Chironomidae and Ceratopogonidae, ususally not common in drift, dominated the drift community. The dominance of midge larvae, the presence of several other organisms not common in drift, and the high discharge during the study period caused a catastrophic drift pattern. (USGS)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Behavioral and catastrophic drift of invertebrates in two streams in northeastern Wyoming
Series title:
Open-File Report
Series number:
80-1101
Edition:
-
Year Published:
1980
Language:
ENGLISH
Description:
iii, 13 leaves (one folded) : ill., map ; 28 cm.