Abstract
On the basic of selective extractions, loosely sorbed phosphorus (ADS-P) has been shown to constitute much of the total phosphorus in the P-rich near-surtace sediments of Lake Sobygaard. Denmark. The concentrations of ADS-P are seasonally variable, ranging from 0 2 mg Pg−1 DW in the winter to more than 2 mg Pg−1 DW in the summer.
The variations can be observed as deep as 10 cm inio the sediment but are pronounced in the upper few centimenters.
During the summer, lake and pore water pH leveis are very high, and photosynthetic activity causes elevation to pH 10–11 in the lake Laboratory experiments demonstrated a strong association between ADS-P and high pore water pH
It is likely that Lake Sobygaard represents an extreme example of pH control on sediment/water phosphorus equilibna in which high concentrations of internal ADS-P contribute significantly to the total P load of the Lake.
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© 1988 Springer-Verlag New York Inc.
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Søndergaard, M. (1988). Seasonal Variations in the Loosely Sorbed Phosphorus Fraction of the Sediment of a Shallow and Hypereutrophic Lake. In: Sly, P.G., Hart, B.T. (eds) Sediment/Water Interactions. Developments in Hydrobiology, vol 50. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2376-8_29
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DOI: https://doi.org/10.1007/978-94-009-2376-8_29
Publisher Name: Springer, Dordrecht
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