Extensive collecting using a variety of methods was conducted in 1994 and 1995 in association with Pleasant Creek in south central Utah, USA, in an effort to inventory the aquatic insects. Collecting efforts yielded 133 insect taxa from 12 sample sites in 8 study areas from near the headwaters of Pleasant Creek and downstream to where it flows out of Capitol Reef National Park. Applying Protocol III methodology of Plafkin et al. (1989), we determined species assemblages of benthic insects and calculated selected ecological indices based on monthly collections from March through August 1994. Richness, equitability index, and mean diversity index values at all sample sites approached, or were greater than, the generally accepted values for clean-water streams in the mountains of the western United States.
Brammer, C. A. and MacDonald, J. F.
"Benthic insect fauna of a clean-water stream on Utah's Colorado Plateau, USA,"
Western North American Naturalist: Vol. 63
, Article 3.
Available at: http://scholarsarchive.byu.edu/wnan/vol63/iss1/3