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The online version of this article (doi:10.1007/s13280-013-0441-3) contains supplementary material, which is available to authorized users.
The external phosphorus (P) loading has been halved, but the P content in the water column and the area of anoxic bottoms in Baltic proper has increased during the last 30 years. This can be explained by a temporary internal source of dissolved inorganic phosphorus (DIP) that is turned on when the water above the bottom sediment becomes anoxic. A load-response model, explaining the evolution from 1980 to 2005, suggests that the average specific DIP flux from anoxic bottoms in the Baltic proper is about 2.3 g P m−2 year−1. This is commensurable with fluxes estimated in situ from anoxic bottoms in the open Baltic proper and from hydrographic data in the deep part of Bornholm Basin. Oxygenation of anoxic bottoms, natural or manmade, may quickly turn off the internal P source from anoxic bottoms. This new P-paradigm should have far-reaching implications for abatement of eutrophication in the Baltic proper.
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Boesch, D., R. Hecky, C. O’Melia, D. Schindler, and S. Seitzinger. 2006. Eutrophication of Swedish Seas. Swedish EPA, Stockholm. Report 5509, 67 pp. ISBN 91-620-5509-7.
Bolalek, J. 1992. Phosphate at the water–sediment interface in Puck Bay. Oceanologia 33: 159–182.
Conley, D.J. 2012. Save the Baltic Sea. Comment. Nature 486: 463–464. CrossRef
Conley, D.J., S. Björck, E. Bonsdorff, J. Carstensen, G. Destouni, B.G. Gustafsson, S. Hietanen, M. Kortekaas, et al. 2009a. Hypoxia-related processes in the Baltic Sea. Environmental Science and Technology 43: 3412–3420. CrossRef
Conley, D.J., E. Bonsdorff, J. Carstensen, G. Destouni, B.G. Gustafsson, L.-A. Hansson, N.N. Rabalais, M. Voss, et al. 2009b. Tackling hypoxia in the Baltic Sea: Is engineering a solution? Viewpoint. Environmental Science & Technology 43: 3407–3411. CrossRef
Diaz, J.M., E.D. Ingall, S.D. Snow, C.R. Benitez-Nelson, M. Taillefert, and J.A. Brandes. 2012. Potential role of inorganic polyphosphate in the cycling of phosphorus within the hypoxic water column of Effingham Inlet, British Columbia. Global Biogeochemical Cycles 26: GB2040. doi: 10.1029/2011GB004226. CrossRef
Gächter, R., and J.S. Meyer. 1993. The role of microorganisms in mobilization and fixation of phosphorus in sediments. Hydrobiologia 253: 103–121. CrossRef
Gächter, R., J.S. Meyer, and A. Mares. 1988. Contribution of bacteria to release and fixation of phosphorus in lake-sediments. Limnology and Oceanography 33: 1542–1558. CrossRef
Gerlach, S.A. 1994. Oxygen conditions improve when the salinity in the Baltic Sea decreases. Marine Pollution Bulletin 28: 413–416. CrossRef
Gustafsson, B.G., F. Schenk, T. Blenckner, K. Eilola, H.E.M. Meier, B. Müller-Karulis, T. Neumann, T. Ruoho-Airola, O.P. Savchuk, and E. Zorita. 2012. Reconstructing the development of Baltic Sea Eutrophication 1850–2006. AMBIO 41: 534–548. doi: 10.1007/s13280-012-0318-x.
Hansson, M., L. Andersson, and P. Axe. 2011. Areal extent and volume of anoxia and hypoxia in the Baltic Sea, 1960–2011. SMHI Swedish Meteorological and Hydrological Institute, Report Oceanography No. 42, Norrköping, Sweden, 76 pp.
Hille, S., G. Nausch, and T. Leipe. 2005. Sedimentary deposition and reflux of phosphorus (P) in the Eastern Gotland Basin and their coupling with P concentrations in the water column. Oceanologia 47: 663–679.
Ingall, E., and R. Jahnke. 1997. Influence of water-column anoxia on the elemental fractionation of carbon and phosphorus during sediment diagenesis. Marine Geology 139: 219–229. CrossRef
Ingall, E., R.M. Bustin, and P. Van Cappellen. 1993. Influence of water column anoxia on the burial and preservation of carbon and phosphorus in marine shales. Geochimica et Cosmochimica Acta 57: 303–316. CrossRef
Lehtoranta, J., P. Ekholm, and H. Pitkänen. 2009. Coastal eutrophication thresholds: A matter of sediment microbial processes. AMBIO 38: 303–308. CrossRef
Mortimer, C.H. 1941. The exchange of dissolved substances between mud and water in lakes: I and II. Journal of Ecology 29: 280–329. CrossRef
Schindler, D.W. 2012. The dilemma of controlling cultural eutrophication of lakes. Proceedings of the Royal Society B 279. doi: 10.1098/rspb.2012.1032.
Slomp, C.P., J. Thomson, and G.J. de Lange. 2002. Enhanced regeneration of phosphorus during formation of the most recent eastern Mediterranean sapropel (S1). Geochimica et Cosmochimica Acta 66: 1171–1184. CrossRef
Steenbergh, A.K., P.L.E. Bodelier, M. Heldal, C.P. Slomp, and H.J. Laanbroek. 2013. Does microbial stoichiometry modulate eutrophication of aquatic ecosystems? Environmental Microbiology 15: 1572–1579. CrossRef
Stigebrandt, A. 2001. Physical oceanography of the Baltic Sea. In A systems analysis of the Baltic Sea, ed. F. Wulff, L. Rahm, and P. Larsson, Ecological Studies 148, 19–74. New York: Springer.
Stigebrandt, A., and B.G. Gustafsson. 2007. Improvement of Baltic proper water quality using large-scale ecological engineering. AMBIO 36: 280–286. CrossRef
Stigebrandt, A., and O. Kalén. 2013. Improving oxygen conditions in the deeper parts of Bornholm Sea by pumped injection of winter water. AMBIO 42(5): 587–595. doi: 10.1007/s13280-012-0356-4.
Sundby, B., L. Anderson, P.O.J. Hall, Å. Iverfeldt, M. Rutgers van der Loeff, and S. Westerlund. 1986. The effect of oxygen on release and uptake of cobalt, manganese, iron and phosphate at the sediment–water interface. Geochimica et Cosmochimica Acta 50: 1281–1288. CrossRef
Wulff, F., L. Rahm, A.-K. Hallin, and J. Sandberg. 2001. A nutrient budget model of the Baltic Sea. In A systems analysis of the Baltic Sea, ed. F. Wulff, L. Rahm, and P. Larsson, Ecological Studies 148, 353–372. New York: Springer.
- A New Phosphorus Paradigm for the Baltic Proper
Per O. J. Hall
- Publication date
- Springer Netherlands