| Abstract: | We tested the hypothesis that there would be measurable losses of phosphorus (P) from surficial sediments of Upper Klamath Lake (UKL), Oregon, if sediments were a source of P during an algal bloom. We compared concentrations of total and forms of P at various depths in cores collected before and after the onset of a large Aphanizomenon flos-aquae bloom. Concentrations of inorganic P were determined in extraction solutions of MgCl2 (1 M, pH 8), citrate-dithionite-bicarbonate, and 1 M HCl. Sediments below 2 cm were dominated by residual P which is defined as total P minus inorganic P. During the study period, data from the top 2-cm of sediment indicated (a) significant decrease in total P concentration, primarily associated with iron oxyhydroxides at one site, and (b) significant increase in total P concentration associated with residual P at a second site. Data from two other sites indicated no net changes in concentrations of total P. ?? 2009 US Government. |
| Genre: | Article |
| ProdID: | 70035877 |
| Citation Author: | Simon, N. S.; Lynch, D.; Gallaher, T. N. |
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| Citation End Page: | 153 |
| Citation Issue: | 1-4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Water, Air, and Soil Pollution |
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| Citation Number Of Pages: | 15 |
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| Citation Search Results Text: | Phosphorus fractionation in sediment cores collected in 2005 before and after onset of an Aphanizomenon flos-aquae bloom in upper Klamath Lake, OR, USA; 2009; Article; Journal; Water, Air, and Soil Pollution; Simon, N. S.; Lynch, D.; Gallaher, T. N. |
| Citation Start Page: | 139 |
| Citation Volume: | 204 |
| Citation Year: | 2009 |
| Type: | citation/reference |
| Text: | Phosphorus fractionation in sediment cores collected in 2005 before and after onset of an Aphanizomenon flos-aquae bloom in upper Klamath Lake, OR, USA; 2009; Article; Journal; Water, Air, and Soil Pollution; Simon, N. S.; Lynch, D.; Gallaher, T. N. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1007/s11270-009-0033-9 |
| Date Other: | Thu, 1 Jan 2009 00:00 -0600 |
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