Sedimentchemische Untersuchungen in Küstengewässern der DDR. Teil 11: Phosphatsorptionsgleichgewichte zwischen Sediment und Wasser in flachen eutrophen Küstengewässern

Schlungbaum, G.

doi:10.1002/aheh.19820100203

Cited by 21 publications

(3 citation statements)

References 19 publications

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“…Dissolved organic matter plays an important role as nutrient source (e.g. [48]) and fast mineralization processes as well as the interaction between sediment and water body in these shallow systems have a strong influence on concentrations. However, the targets calculated with the regression approach are suggested as new target concentrations for winter DIN and DIP.…”

Section: An Alternative Approach For Winter Nutrient Target Concentramentioning

confidence: 99%

Implementation of European marine policy: New water quality targets for German Baltic waters

et al. 2015

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a b s t r a c tA full re-calculation of Water Framework Directive reference and target concentrations for German coastal waters and the western Baltic Sea is presented, which includes a harmonization with HELCOM Baltic Sea Action Plan (BSAP) targets. Further, maximum allowable nutrient inputs (MAI) and target concentrations in rivers for the German Baltic catchments are suggested. For this purpose a spatially coupled, large scale and integrative modeling approach is used, which links the river basin flux model MONERIS to ERGOM-MOM, a three-dimensional ecosystem model of the Baltic Sea. The years around 1880 are considered as reference conditions reflecting a high ecological status and are reconstructed and simulated with the model system. Alternative approaches are briefly described, as well. For every WFD water body and the open sea, target concentrations for nitrogen and phosphorus compounds as well as chlorophyll a are provided by adding 50% to the reference concentrations. In general, the targets are less strict for coastal waters and slightly stricter for the sea (e.g. 1.2 mg/m³ chl.a summer average for the Bay of Mecklenburg), compared to current values. By taking into account the specifics of every water body, this approach overcomes the inconsistencies of earlier approaches. Our targets are well in agreement with the BSAP targets, but provide spatially refined and extended results. The full data are presented in Appendix A1 and A2.To reach the targets, German nitrogen inputs have to be reduced by 34%. Likely average maximum allowable concentrations in German Baltic rivers are between 2.6 and 3.1 mg N/l. However, the concrete value depends on the scenario and uncertainties with respect to atmospheric deposition. To our results, MAI according to the BSAP may be sufficient for the open sea, but are not sufficient to reach a good WFD status in German coastal waters.

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Section: An Alternative Approach For Winter Nutrient Target Concentramentioning

confidence: 99%

Implementation of European marine policy: New water quality targets for German Baltic waters

et al. 2015

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“…The data evaluation followed in principle the procedure by Schlungbaum (1982) and Schulz and Herzog (2004). Fresh sediment corresponding to 1 g DW was weighed and 20 ml of a defined P solution was added.…”

Section: Sediment Sampling and Analysismentioning

confidence: 99%

What drives the evolution of the sedimentary phosphorus cycle?

et al. 2010

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a b s t r a c tThe 'Chicken Creek' artificial catchment area, Welzow-South, E Germany, created to study processes and structures of initial ecosystem development, discharges into a small experimental lake (A =3805 m 2 , V= 3992 m 3 , z max = 2.4 m). This lake was man-made in 2005 and filled by natural surface runoff until January 2006. In summer 2006 and 2008, the actual development of sediments and the evolution of the phosphorus (P) cycle were studied. 19.7% of the original lake volume was filled by sediment within the first 3 years. A fine-grained sediment representing silt (6.3-63 mm) accumulated at high accretion rates at the deepest point (200 mm a À 1 , 0-24 mm week À 1 ) due to massive erosion in the catchment. The sediment is low in organic matter (2.5-5.2%) and total P (TP, 0.31-0.97 mg g À 1 ). Low amounts of P associated with degradable organic matter and surplus of metal hydroxides (Fe:P $ 40, Al:P $ 20) favor an efficient P binding and low dissolved P concentrations in pore water (1-107 mg l À 1 ).Hence, the mineral sediment quality and the low rates of P release (0.06 mg m À 2 d À 1 ) revealed that a lake at an initial stage of development has essentially no sedimentary P cycle compared to eutrophic shallow lakes. However, the increasing emersed and submersed macrophyte growth will control further lake succession by intensifying the internal nutrient cycling. The macrophytes drive the evolution of a sedimentary P cycle by mobilizing and translocating P, by accumulating carbon and thus by stimulating microbial and redox processes.

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“…This is caused by the sorption/desorption equilibrium of phosphate and the high phosphate sorption capacity of the sediments. A very low equilibrium concentration of 0.3 to 1 lmol L -1 has been identified for the DZBC [33]. Additionally, gel chromatographic investigations of the phosphate fraction revealed that only 40% of molybdenum-blue reactive phosphorus (SRP) exists as orthophosphate and is therefore directly available to algal growth [34].…”

Section: Nutrient Concentrations Along the Salinity Gradient Of The Dzbcmentioning

confidence: 99%

Nutrient accumulation and nutrient retention in coastal waters – 30 years investigation in the Darss‐Zingst Bodden chain

Selig¹,

Baudler

Krech

et al. 2006

Acta hydrochim. hydrobiol.

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Coastal waters are transitional zones between limnic waters and marine systems. The anthropogenic impact on these water bodies is high and a rapid change of trophic level was observed within the last 50 years. In the Darss-Zingst Bodden chain (southern Baltic Sea -MecklenburgWest Pomerania, Germany), the change in trophic state during the last thirty years can be reconstructed by long-term monitoring of chemical, hydrographical and biological parameters with an up to daily resolution. Until the 1980s, increased input of the anthropogenic nutrient load from the catchment area has been documented. However, with the implementation of the HELCOM recommendations the input of phosphorus and nitrogen was reduced in the 1990s. In contrast to the reduction of nutrient inputs, a decrease in nutrient concentrations and primary production could not be observed. The reasons are a high internal nutrient load and the release of nutrients out of the sediments. Numerous research projects allowed the description and quantification of these processes. Today, the internal phosphorus pool exceeds the external phosphorus load several fold. These results are the scientific basis for the development of restoration strategies of coastal waters. The development of suitable management plans is necessary for the implementation of the EU Water Framework Directive to guarantee a good ecological state by 2015. The long time acquisition of monitoring data and voluminous complementary specific research projects was enabled by the local field research conditions of the Biological Station of the University of Rostock in Zingst.

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Sedimentchemische Untersuchungen in Küstengewässern der DDR. Teil 11: Phosphatsorptionsgleichgewichte zwischen Sediment und Wasser in flachen eutrophen Küstengewässern

Cited by 21 publications

References 19 publications

Implementation of European marine policy: New water quality targets for German Baltic waters

Implementation of European marine policy: New water quality targets for German Baltic waters

What drives the evolution of the sedimentary phosphorus cycle?

Nutrient accumulation and nutrient retention in coastal waters – 30 years investigation in the Darss‐Zingst Bodden chain

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