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Determination of Algal-available Phosphorus on Soil and Sediment: A Review and Analysis¹

ABSTRACT

Important advances have been made recently in identifying the sources of algal-available P in soils and sediments. Algal bioassays have shown that considerable amounts of the total soil P may be algal-available under the appropriate environmental conditions. At present, however, the reported research contains no convincing evidence that the bioassay techniques used quantitatively measured all of the algal-available P present in the soils and sediments tested. Although chemical fractionation procedures have shown from which fractions algae obtain P, there is no evidence that all of the chemically extracted P in those fractions is algal-available. Quantitative assessment of algal-available P in soils and sediments will depend upou the development of long-term algal assay procedures.

Key Words: eutrophication • nutrient enrichment • agricultural runoff

¹ Contribution from the University of Pennsylvania, Philadelphia, PA 19104. Supported, in part, by the Andrew W. Mellon Foundation.

² Project Engineer, L. Robert Kimball & Associates, Ebensburg, PA 15931, formerly Graduate Assistant, Department of Civil and Urban Engineering; Associate Professor, Dep. of Landscape Architecture and Regional Planning and Dep. of Geology and Associate Professor, Dep. of Civil and Urban Engineering, respectively.

Received for publication August 14, 1981.

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				R. Uusitalo and P. Ekholm Phosphorus in Runoff Assessed by Anion Exchange Resin Extraction and an Algal Assay J. Environ. Qual., March 1, 2003; 32(2): 633 - 641. [Abstract] [Full Text] [PDF]