Summary
Between February 1992 and June 1993 the distribution of particulate and dissolved phosphorus in the Ems estuary was investigated in approximately monthly intervals. Furthermore, the phosphorus content of sediments was assessed. These data as well as literature data were used to construct a phosphorus budget of the Ems estuary. Fluxes were dominated by the particulate fraction representing 77% of the total phosphorus input. 40% of the phosphorus input is lost to the sediment. In suspended matter from the coastal zone and from rivers, organic and iron-bound phosphorus dominate (> 75%). Within the sediments phosphorus is mainly associated with calcium minerals like apatites (65%). The presence of authigenic apatites was confirmed with a sequential extraction method. Combination of the phosphorus budget with the data on the composition of particulate phosphorus shows that the organic and iron bound phosphorus is not stable on longer time scales: about 80% is either transformed into dissolved phosphorus and exported from the estuary or transformed to apatites and buried. It is suggested that formation and retention of authigenic apatites is the major process withdrawing phosphorus from the coastal biogeochemical cycle.
Zusammenfassung
Von Februar 1992 bis Juni 1993 wurde die Verteilung von partikulÄrem und gelöstem Phosphor in der Emsmündung in ca. monatlichen AbstÄnden untersucht. Der Phosphorgehalt der Sedimente wurde ebenfalls bestimmt. Aufgrund der Me\werte und Literaturangaben wurde ein Phosphorhaushalt der Emsmündung erstellt. Bestimmend für die UmsÄtze war der partikulÄre Anteil von 77% des Gesamtphosphoreintrags. 40% des Phosphoreintrags lagert sich im Sediment ab. In Schwebstoffen aus den Küsten- und Flu\bereichen dominiert der organische und eisengebundene Phosphor (> 75%), wÄhrend Phosphor im Sediment hauptsÄchlich an Calciummineralien wie Apatit gebunden ist. Das Vorhandensein authigener Apatite wurde mit Hilfe einer sequentiellen Extraktionsmethode bestÄtigt. Eine Gegenüberstellung des Phosphorhaushalts und der Daten über die Zusammensetzung des partikulÄr gebundenen Phosphors zeigt, da\ der organische und eisengebundene Phosphor lÄngerfristig nicht stabil ist: ca. 80% werden entweder in gelösten Phosphor umgewandelt und aus dem Ästuar ausgetragen oder in Apatite umgewandelt und abgelagert. Es wird angenommen, da\ der Hauptmechanismus, durch den Phosphor dem biogeochemischen Kreislauf der KüstengewÄsser entzogen wird, die Bildung und Ablagerung authigener Apatite ist.
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References
Aspila, K. I., H. Agemian andA. S. Y. Chau, 1976: A semiautomatic method for the determination of inorganic, organic and total phosphate in sediments.Analyst,101, 187–197.
Brockmann, U., R. W. P. M. Laane andH. Postma, 1990: Cycling of nutrient elements in the North Sea.Netherlands Journal of Sea Research,26(2–4): 239–264.
Cadée, G. C., 1992: Phytoplankton variability in the Marsdiep, The Netherlands.ICES Marine Science Symposia,195, 213–222.
Cadée, G. C. andJ. Hegeman, 1993: Persisting high levels of primary production at declining phosphate concentrations in the Dutch coastal area (Marsdiep).Netherlands Journal of Sea Research,31, 147–152.
Colijn, F., 1983: Primary production in the Ems-Dollard Estuary. PhD thesis, Rijksuniversiteit Groningen, NL.
Conley, D. J., W. M. Smith, J. C. Cornwell andT.R. Fisher, 1995: Transformation of particle-bound phosphorus at the land-sea interface.Estuarine, Coastal and Shelf Science,40, 161 -176.
De Jonge, V. N., 1990: Response of the Dutch Wadden Sea ecosystem to phosphorus discharges from the River Rhine.Hydrobiologia,195, 49–62.
De Jonge, V. N. andH. Postma, 1974: Phosphorus compounds in the Dutch Wadden sea.Netherlands Journal of Sea Research,8, 139–153.
De Jonge V. N., M. M. Engelkes andJ. F. Bakker, 1993: Bio-availability of phosphorus in sediments of the western Dutch Wadden Sea.Hydrobiologia,253, 151–163.
Eisma, D., 1993: Sedimentation in the Dutch-German Wadden Sea. Mitteilungen des Geologisch-PalÄontologischen Instituts der UniversitÄt Hamburg74, 253–274.
Froelich, P. N., 1988: Kinetic control of dissolved phosphate in natural rivers and estuaries: a primer on the phosphate buffer mechanism.Limnology and Oceanography,33, 649–668.
Gassman, G., D. Glindeman andJ. E. E. van Beusekom, 1996: Offshore atmospheric phosphine.Naturwissenschaften,83, 129–131.
Grasshoff, K., M. Erhardt andK. Kremling, 1983: Methods of Seawater Analysis. Verlag Chemie, Weinheim.
Jensen, H. S. andB. Thamdrup, 1993: Iron-bound phosphorus in marine sediments as measured by bicarbonate dithionite extraction.Hydrobiologia,253, 47–59.
Joint, I. andA. Pomroy, 1993: Phytoplankton biomass and production in the southern North Sea.Marine Ecology Progress Series,99, 169–182.
Lebo, M. E., 1991: Particle-bound phosphorus along an urbanized coastal plain estuary.Marine Chemistry,34, 225–246.
Peeters, K. C. H., Haas andL. Peperzak, 1991: Eutrophiering, primaire productie en zuurstofhuishouding in de Noordzee. GWAO-91.083, (Dutch Ministry of Transport, Public Works and Water Management), The Hague, The Netherlands, in Dutch.
Postma, H., 1954: Hydrography of the Dutch Wadden Sea. A study of the relation between water movement, the transport of suspended materials and the production of organic matter.Archive Néerlandais Zoologique,10, 405–511.
Psenner, R., B. Boström, M. Dinka, K. Petterson, R. Puesko andM. Sager, 1988: Fractionation of phosphorus in supended matter and sediments.Arch. Hydrobiol. Beih.,30, 98–100.
Rao, J. andR. A. Berner, 1993: Phosphorus dynamics in the Amazon river and estuary.Chemical Geology,107, 397–400.
Reinders, R. andD. H. van der Meulen, 1972: De ontwikkeling van de Dollard over de periode 1952–1969/70. Rijkswaterstaat, direktie Groningen, afdeling Studiedienst, nota 72.1.
Ruttenberg, K. C., 1992: Development of a sequential extraction method for different forms of phosphorus in marine sediments.Limnology and Oceanography,37, 1460–1482.
Ruttenberg, K. C. andR. A. Berner, 1993: Authigenic apatite formation and burial in non-upwelling coastal sediments.Geochimica et Cosmochimca Acta,57, 991–1007.
Schaub, B. E. M. andW. W. C. Gieskes, 1991: Eutrophication of the North Sea: The relation between Rhine river discharge and chlorophyll-a concentration in Dutch coastal waters, p. 85–90. In M. Elliot and J.-P. Ducrotoy (Eds), Estuaries and coasts: spatial and temporal intercomparisons. International Symposium Series, Olsen and Olsen, Fredensborg, Denmark.
Schlünzen, K. H., 1994: AtmosphÄrische EintrÄge von NÄhr- und Schadstoffen, p. 45–48. In J. L. LozÄn, E. Rachor, K. Reise, H. von Westernhagen and W. Lenz (eds.), Warnsignale aus dem Wattenmeer. Berlin: Blackwell.
Van Beusekom, J. E. E. andV. N. de Jonge,1998: Retention of phosphorus and nitrogen in the Ems estuary.Estuaries, accepted.
Van Beusekom, J. E. E. andU. H. Brockmann,1998: Transformation of phosphorus in the Elbe Estuary.Estuaries, accepted.
Van Cappellen, P. andR. A. Berner, 1988: A mathematical model for the early diagenesis of phosphorus and fluorine in marine sediments: Apatite precipitation.American Journal of Science,288, 289–333.
Van Straaten L. J. M. U. andPh. H. Kuenen, 1958: Tidal action as a cause for clay accumulation.Journal of Sedimentology and Petrology,28, 406–413.
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van Beusekom, J.E.E., de Jonge, V.N. Transformation of phosphorus in the wadden sea: Apatite formation. Deutsche Hydrographische Zeitschrift 49, 297–305 (1997). https://doi.org/10.1007/BF02764040
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DOI: https://doi.org/10.1007/BF02764040