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Research article2012Peer reviewed

Diagenesis of settling seston: identity and transformations of organic phosphorus

Reitzel, Kasper; Ahlgren, Joakim; Rydin, Emil; Egemose, Sara; Turner, Benjamin L.; Hupfer, Michael


Solution (31)phosphorus NMR spectroscopy and sequential fractionation were used to follow diagenetic changes in phosphorus forms during decomposition of settling seston in Lake Nordborg, a shallow eutrophic lake in Denmark. In a decomposition experiment, seston released >60% of their total phosphorus during similar to 50 days incubation, although seston collected during summer contained more phosphorus and released it over a longer period compared to seston collected during spring. Seston decomposition increased concentrations of potentially bioavailable polyphosphate and phosphodiesters, but also promoted the formation of refractory phosphorus forms that might be buried permanently in the sediment. Combining these results with in situ measurements of phosphorus concentrations in lake water and sediment traps revealed that the release from settling seston plays only a minor role in the accumulation of phosphorus in the hypolimnion of Lake Nordborg.

Published in

Journal of Environmental Monitoring
2012, Volume: 14, number: 3, pages: 1098-1106

    Sustainable Development Goals

    Ensure availability and sustainable management of water and sanitation for all

    UKÄ Subject classification

    Analytical Chemistry
    Environmental Sciences

    Publication identifier


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