| Abstract: | The May 18, 1980, eruption of Mount St. Helens deposited about 15 millimeters of volcanic ash on the Big Creek basin in northern Idaho. Much of the uncompacted ash remained on hillsides a year after the eruption. Physical and chemical analyses of water samples from Big Creek collected from December 1980 to December 1981 showed no anomalies attributable to ash. Qualitative collections showed benthic invertebrates to be abundant and diverse in Big Creek. Experiments conducted in an unimpacted mountain stream revealed a small quantity of volcanic ash may be beneficial not detrimental to invertebrate communities. Benthic invertebrates were most abundant on ash-covered artificial substrates, with detritovores dominating the communities on all substrates. (USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 27190 |
| Citation Author: | Frenzel, S. A. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | iii, 37 p. :ill., map ;28 cm. |
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| Citation Publisher: | U.S. Geological Survey, |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 82-4106 |
| Citation Search Results Text: | Effects of volcanic ash on the benthic environment of a mountain stream, northern Idaho; 1982; WRI; 82-4106; Frenzel, S. A. |
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| Citation Year: | 1982 |
| Type: | citation/reference |
| Text: | Effects of volcanic ash on the benthic environment of a mountain stream, northern Idaho; 1982; WRI; 82-4106; Frenzel, S. A. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/wri/1982/4106/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/wri/1982/4106/report.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, |
