Rotenone Effects on Aquatic Macroinvertebrates of the Strawberry River, Utah: A Five-Year Summary
作者:
FredrickA. Mangum,
J.L. Madrigal,
期刊:
Journal of Freshwater Ecology
(Taylor Available online 1999)
卷期:
Volume 14,
issue 1
页码: 125-135
ISSN:0270-5060
年代: 1999
DOI:10.1080/02705060.1999.9663661
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Before treatment with a 3 mg/1 Noxfish (0.15 mg/1 active ingredient; rotenone) for 48 hours, benthic invertebrate communities were quantitatively sampled with a modified Surber net. Then spring, summer, and fall post-rotenone samples were taken monthly at each of four Strawberry River stations for five years. Statistical analyses of the data indicated that the application of rotenone had a significant effect on the following species density:Cinygmula sp., Pteronarcella badia,Hesperoperla pucifica, Hydropsyche sp., and Brachycentrus americanus.Thirty-three percent of the benthic invertebrate taxa at the four stations showed resistance to rotenone. Up to 100% of Ephemeroptera, Plecoptera and Trichoptera species were missing after the second rotenone application. Forty-six percent of the taxa recovered within one year, but 21% of the taxa were still missing after five years. Of the 19 taxa still missing, 47% were Trichoptera, 21% were Ephemeroptera, 16% were Plecoptera, 11% were Coleoptera, and 5% were Megaloptera.
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