Phosphorus fractionation in sediment cores collected in 2005 before and after onset of an Aphanizomenon flos-aquae bloom in upper Klamath Lake, OR, USA
Water, Air, & Soil Pollution
By: N.S. Simon, D. Lynch, and T.N. Gallaher
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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.
Suggested Citation
Simon, N., Lynch, D., and Gallaher, T., 2009, Phosphorus fractionation in sediment cores collected in 2005 before and after onset of an Aphanizomenon flos-aquae bloom in upper Klamath Lake, OR, USA: Water, Air, & Soil Pollution, v. 204, no. 1-4, p. 139-153, https://doi.org/10.1007/s11270-009-0033-9.
ISSN: 1573-2932 (online)
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Phosphorus fractionation in sediment cores collected in 2005 before and after onset of an Aphanizomenon flos-aquae bloom in upper Klamath Lake, OR, USA |
| Series title | Water, Air, & Soil Pollution |
| DOI | 10.1007/s11270-009-0033-9 |
| Volume | 204 |
| Issue | 1-4 |
| Publication Date | April 04, 2009 |
| Year Published | 2009 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Water, Air, and Soil Pollution |
| First page | 139 |
| Last page | 153 |