Abstract
During each of the first 8 years following an 80–90% reduction in external phosphorus loading of shallow, hypertrophic Lake Sobygaard, Denmark in 1982, phosphorus retention was found to be negative. Phosphorus release mainly occurred from April to October, net retention being close to zero during winter. Net internal phosphorus loading was 8 g P m-2 y -1 in 1983 and slowly decreased to 2 g P m -2 y-1 in 1990, mainly because of decreasing sediment phosphorus release during late summer and autumn. The high net release of phosphorus from Lake Søbygaard sediment is attributable to a very high phosphorus concentration and to a high transport rate in the sediment caused by bioturbation and gas ebullition. Sediment phosphorus concentration mainly decreased at a depth of 5 to 20 cm, involving sediment layers down to 23 cm. Maximum sediment phosphorus concentration, which was 11.3 mg P g -1 dw at a depth of 14–16 cm in 1985, decreased to 8.6 mg P g -1 dw at a depth of 16–18 cm in 1991. Phosphorus fractionation revealed that phosphorus release was accompanied by a decrease in NH4ClP + NaOH-P and organic phosphorus fractions. HC1-P increased at all sediment depths. The Fe:P ratio in the superficial layer stabilized at approximately 10. Net phosphorus release can be expected to continue for another decade at the present release rate, before an Fe:P ratio of 10 will be reached in the sediment layers from which phosphorus is now being released.
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References
Aarhus County, 1979. Søbygard Sø 1978 (in Danish). Aarhus County Council.
Andersen, J. M., 1976. An ignition method for determination of total phosphorus in lake sediments. Wat. Res. 10: 329–331.
Boström, B., M. Jansson & C. Forsberg, 1982. Phosphorus release from lake sediments. Arch. Hydrobiol. Beih. Ergebn. Limnol. 18: 5–59.
Boström, B., I. Ahlgren & R. Bell, 1985. Internal nutrient loading in a eutrophic lake, reflected in seasonal variations of some sediment parameters. Verh. int. Ver. Limnol. 22: 3335–3339.
Boström, B., J. M. Andersen, S. Fleicher & M. Jansson, 1988. Exchange of phosphorus across the sediment water interface. In G. Persson & M. Jansson (eds), Phosphorus in Freshwater Ecosystems. Developments in Hydrobiolgy 48. Kluwer Academic Publishers, Dordrecht: 229–244. Reprinted from Hydrobiologia 170.
Cullen, P. & C. Forsberg, 1988. Experience with reducing point sources of phosphorus to lakes. In G. Persson & M. Jansson (eds), Phosphorus in Freshwater Ecosystems. Developments in Hydrobiolgy 48. Kluwer Academic Publishers, Dordrecht: 321–336. Reprinted from Hydrobiologia 170.
Hamilton, D. P. & S. F. Mitchell, 1988. Effects of wind on nitrogen, phosphorus, and chlorophyll in a shallow New Zealand lake. Verh. int. Ver. Limnol. 23: 624–628.
Hieltjes, A. H. M. & L. Lijklema, 1980. Fractionation of Inorganic Phosphates in Calcareous Sediments. J. envir. Qual. 9: 405–407.
Jensen, P. & P. Kristensen, 1987. Sedimentation og resuspension i Søbygaard Sø. Mc. thesis from the Botanical Institute, University of Aarhus, 150 pages (in Danish).
Jensen, H. S., P. Kristensen, E. Jeppesen & A. Skytthe, 1992a. Iron:Phosphorus ratio in surface sediment as an indicator of phosphate release from aerobic sediments in shallow lakes. In B. T. Hart & P. G. Sly (eds), Sediment/Water Interactions. Developments in Hydrobiology 75. Kluwer Academic Publishers, Dordrecht: 731–743. Reprinted from Hydrobiologia 235/236.
Jensen, J. P., E. Jeppesen, P. Kristensen, P. B. C. Christensen & M. Søndergaard, 1992b. Nitrogen loss and denitrification as studied in relation to reductions in nitrogen loading in a shallow, hypertrophic lake (Lake Søbygaard, Denmark). Int. Revue ges. Hydrobiol 77: 29–42.
Jeppesen, E., M. Søndergaard, E. Mortensen, P. Kristensen, B. Riemann, H. J. Jensen, J. P. Müller, O. Sortkjær, J. P. Jensen, K. Christoffersen, S. Bosselmann & E. Dall, 1990. Fish manipulation as a lake restoration tool in shallow, eutrophic lakes 1: cross-analysis of three Danish case-studies. In R. D. Gulati, E. H. R. R. Lammens, M.-L. Meijer & E. van Donk (eds), Biomanipulation - Tool for Water Management. Developments in Hydrobiology 61. Kluwer Academic Publishers, Dordrecht: 205–218. Reprinted from Hydrobiologia 200/201.
Jeppesen, E., P. Kristensen, J. P. Jensen, M. Søndergaard, E. Mortensen & T. Lauridsen, 1991. Recovery resilience following a reduction in external phosphorus loading of shallow, eutrophic Danish lakes: duration, regulating factors and methods for overcoming resilience. Mem. Ist. ital. Idrobiol., 48: 127–148.
Jeppesen, E., O. Sortkjær, M. Søndergaard & M. Erlandsen, 1992. Impact of a trophic cascade on heterotrophic bacterioplankton production in two shallow fish-manipulated lakes. Arch. Hydrobiol., in press.
Kajak, Z., K. Kacprzak & R. Polkowski, 1965. Tube bottom sampler for taking samples og micro and macro benthos, and for sampling of undisturbed structures of mud samples for experimental purposes. Ekol. pol. 11: 159–165.
Koroleff, F., 1970. Determination of total phosphorus in natural waters by means of persulphate oxidation. An interlab. Report No. 3 Cons. int. Explor. Mer.
Löfgren, S. & B. Boström, 1989. Interstitial water concentrations of phosphorus, iron and manganese in a shallow, eutrophic Swedish lake - implication for phosphorus cycling. Wat. Res. 23: 1115–1125.
Marsden, W. M., 1989. Lake restoration by reducing external phosphorus loading: the influence of sediment phosphorus release. Freshwat. Biol. 21: 139–162.
Sas, H., 1989. Lake restoration by reduction of nutrient loading. Expectations, experiences, extrapolation. Academic Verlag St, Augustin, 497 pp.
Schindler, D. W., 1985. The coupling of elemental cycles by organisms: evidence from whole-lake chemical perturbations. In W. Stumm (ed.), Chemical Processes in Lakes. John Wiley and Sons, New York: 225–250.
Shapiro, J., W. T. Edmondson & D. E. Allison, 1971. Changes in the chemical composition of sediments of lake Washington, 1958–1970. Limnol. Oceanogr. 16: 437–452.
Skogheim, O. K. & A. H. Erlandsen, 1979. Transport mechanisms of solutes in lake sediments. Seventh Nordic sediment symposium: 124–134.
Stumm, W. & J. O. Leckie, 1971. Phosphate exchange with sediments; its role in the productivity of surface water. Eidgen. Techn. Hochschulen, Separatum Nr. 406. Dübendorf, Schweiz.
Søndergaard, M., 1988. Seasonal Variations in the Loosely Sorbed Phosphorus Fraction of the Sediment of a Shallow and Hypereutrophic Lake. Envir. Geol. Wat. Sci. 11: 115–121.
Søndergaard, M., 1989. Phosphorus release from a hypertrophie lake sediment: Experiments with intact sediment cores in a continuous flow system. Arch. Hydrobiol. 116: 45–59.
Søndergaard, M., 1990. Pore water dynamics in the sediment of a shallow and hypertrophie lake. Hydrobiologia 192: 247–258.
Søndergaard, M., E. Jeppesen, P. Kristensen & O. Sortkjær, 1990. Interactions between sediment and water in a shallow and hypertrophie lake: a study on phytoplankton collapses in Lake Søbygård, Denmark. In P. Biró & J. F. Talling (eds), Trophic Relationships in Inland Waters. Developments in Hydrobiology 53. Kluwer Academic Publishers, Dordrecht: 139–148. Reprinted from Hydrobiologia 191.
Tessenow, U., 1972. Lösungs-, Diffusion-and Sorptionsprozesse in der Oberschicht von Seesedimenten. 1. Ein Langzeitexperiment unter aeroben and anaeroben Bedingungen im Fliessgleichgewicht. Arch. Hydrobiol. Suppl. 38: 353–398.
Wisniewski, R. J. & M. Planter, 1985. Exchange of phosphorus across sediment water interface (with special attention to the influence of biotic factors) in several lakes of different trophic status. Verh. int. Ver. Limnol. 22: 3345–3349.
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Søndergaard, M., Kristensen, P., Jeppesen, E. (1993). Eight years of internal phosphorus loading and changes in the sediment phosphorus profile of Lake Søbygaard, Denmark. In: Boers, P.C.M., Cappenberg, T.E., van Raaphorst, W. (eds) Proceedings of the Third International Workshop on Phosphorus in Sediments. Developments in Hydrobiology, vol 84. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1598-8_43
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DOI: https://doi.org/10.1007/978-94-011-1598-8_43
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