Modelling seasonal and long-term dynamics of anions in an acid forest soil, Solling, Germany

Wesselink, L.G.; Mulder, Jan; Matzner, Egbert

doi:10.1016/0016-7061(94)90087-6

Cited by 14 publications

(17 citation statements)

References 11 publications

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“…We compare our modeling results to previous studies on long-term SO42dynamics at other forest sites in the US (e.g., Johnson et al 1993Johnson et al , 1996Johnson et al , 1999Driscoll et al 1998a) and in Europe (Wesselink et al 1994(Wesselink et al , 1995. The specific objectives were to: (1) reconstruct long-term patterns of atmospheric S deposition to the HBEF, (2) simulate the long-term dynamics of S and assess mechanisms contributing to the discrepancy in watershed S mass balances, (3) evaluate the impact of clear-cutting on S dynamics at the HBEF, (4) utilize information on stable S isotope ratios together with the modeled S fluxes to attempt to verify the HBEF S budget, and (5) assess changes in soil fluxes and surface-water chemistry following reductions in atmospheric S deposition.…”

Section: Sulfur (S) Is An Important Element In the Biogeochemistry Ofmentioning

confidence: 86%

A Model to Simulate the Response of a Northern Hardwood Forest Ecosystem to Changes in S Deposition

Gbondo-Tugbawa

Driscoll

Mitchell

et al. 2002

Ecological Applications

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org. This content downloaded from 134.114.138.130 on Tue, 30 Jun 2015 20:35:02 UTC All use subject to JSTOR Terms and ConditionsAbstract. Watershed studies across the northeastern United States have shown that stream losses of S042-exceed atmospheric sulfur (S) deposition. Understanding the processes responsible for this additional source of S is critical to quantifying ecosystem response to ongoing and potential future controls on SO2 emission. An integrated biogeochemical model, PnET-BGC, was used to investigate inputs and dynamics of S in a northern hardwood forest at the Hubbard Brook Experimental Forest (HBEF), New Hampshire, USA. The changes in soil S pools and stream-water S042-were simulated to assess the response to both atmospheric S deposition and forest clear-cutting disturbances. Model simulation using the measured dry-to-bulk deposition ratio of 0.21 resulted in an underprediction of soil S pools and stream-water S042-concentrations in the biogeochemical reference watershed (Watershed 6). However, the depiction of biotic processes (e.g., plant uptake, mineralization) in the model reduced the discrepancy in stream SO42-concentration between measured and model predicted value by -50% compared to a previous modeling effort that only considered abiotic processes. Long-term simulations (-150 yr) indicated that elevated anthropogenic S deposition has increased stream S042-concentrations and enhanced the incorporation of S in adsorbed S042-and organic S soil pools. Following the implementation of the 1970 and 1990 Amendments to the Clean Air Act, decreases in S deposition resulted in the net release of S from soil pools, including soil organic S. Model simulation of forest clear-cutting of Watershed 5 at the HBEF showed that NO3-leachingand associated acidification following this disturbance increased adsorption of SO42-to soil. Compared to the reference watershed, stream-water SO42-concentrations were slightly higher, and soil adsorbed SO42-pools were substantially higher in the clear-cut watershed 4-5 yr after disturbance. Simulation of stable S isotopes showed that fractionation associated with the mineralization of soil organic S might explain the depletion in 34S observed between throughfall and stream water in the reference watershed. There is a need for further research on: (1) the rates of dry S deposition and (2) the rate of weathering of various minerals and the isotopic composition of these minerals in order to fully assess the discrepancy (i.e., greater export of S than can be accounted for by atmospheric deposition) in watershed S mass balances. The results of forecasts of the future response to anticipated decreases in S deposition are highly dependent on the natur...

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Section: Sulfur (S) Is An Important Element In the Biogeochemistry Ofmentioning

confidence: 86%

A Model to Simulate the Response of a Northern Hardwood Forest Ecosystem to Changes in S Deposition

Gbondo-Tugbawa

Driscoll

Mitchell

et al. 2002

Ecological Applications

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“…We considered a single soil compartment of 50 cm with a constant water input flux of 70 cm/yr, a drainage flux of 35 cm/yr (19), a CEC of 250 kequivlha (Z), an initial base saturation of 5%, and a gibbsite solubility constant (pKa(0~)3) of -8.7 (40). Still, we chose model parameters representative for the Solling spruce site to conceptualize soil chemical responses to changes in atmospheric deposition and the time scales of these responses for the Solling case study.…”

Section: Introductionmentioning

confidence: 99%

Long-Term Changes in Water and Soil Chemistry in Spruce and Beech Forests, Solling, Germany

Wesselink¹,

Meiwes²,

Matzner³

et al. 1995

Environ. Sci. Technol.

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“…The litter layer was not a significant source contributing sulphates to the soil solution. Also the release of organically bound sulphur from the mineral soil seems unlikely, as resources of organic sulphur are rather low [80]. That is why the contribution of sulphate to forest floors is primarily of anthropogenic origin, in the form of deposition with precipitation.…”

Section: Anionsmentioning

confidence: 99%

“…A large role in sulphate retention is played by reactions of surface adsorption, hence an important parameter is the specific surface of the soil. Soils of glacial origin have a small specific surface and therefore an alternative description for sulphate retention and release in forest soils under conditions of high sulphur deposition could be the formation and dissolution of the mineral jurbanite [80]. Due to their adsorption properties, sulphates are retained in the soil and migrate rather slowly.…”

Section: Anionsmentioning

confidence: 99%

“…Therefore, detailed information on the composition of and changes in soils affected by acid deposition is highly relevant to an assessment of risk of acidification-related forest damage. The composition of the soil solution as an index of potential Al toxicity has been used in the development of models for simulating the effects of acidic deposition on the soil and water system [31][32][33]. However, the quantification and identification of respective Al species is still a difficult task.…”

Section: Introductionmentioning

confidence: 99%

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Composition and variability of soil solutions as a measure of human impact on protected woodland areas

Walna

2007

Open Chemistry

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Abstract:A study was made of the sandy and loamy soils of the woodland areas of the Wielkopolski National Park (Poland) affected by acid rain. The basic properties of the soils were determined, revealing their strong acidification, poor buffering power, and the possibility of aluminium release. An analysis was made of the content of soluble, exchangeable, organic, amorphous, and free forms of aluminium. The concentration of exchangeable aluminium exceeded that of the form dissolved in soil water several times to tens of times. In soil solutions Ca/Al ratios in some horizons show very low values that could induce a nutrient deficit. In the sandy profiles the ratio even drops below the critical level of 0.1. In the surface horizon the dominant cation at all the sites is the aluminium ion. An analysis of anions shows a dominance of sulphate and chloride ions. In autumn nitrites were recorded at all depth levels, while in spring only in the surface layers. The highest fluoride concentrations were found to occur in profiles situated the closest to the emission source of fluorine compounds. The markedly higher concentrations of ammonium than nitrate ions can lead to increased acidification and eutrophication of the soil.

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Modelling seasonal and long-term dynamics of anions in an acid forest soil, Solling, Germany

Cited by 14 publications

References 11 publications

A Model to Simulate the Response of a Northern Hardwood Forest Ecosystem to Changes in S Deposition

A Model to Simulate the Response of a Northern Hardwood Forest Ecosystem to Changes in S Deposition

Long-Term Changes in Water and Soil Chemistry in Spruce and Beech Forests, Solling, Germany

Composition and variability of soil solutions as a measure of human impact on protected woodland areas

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