Effects of Simulated Sulphuric Acid Deposition On<i>Calluna Vulgaris</i>/Peat Microcosms and Associated Soil Solutions

Parveen, Zakia; Smart, Richard P.; White, Catherine C.; Gammack, Shimna M.; Deacon, Claire; Cresser, Malcolm S.

doi:10.1080/02757540108035560

Cited by 1 publication

(7 citation statements)

References 34 publications

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“…Therefore, we may assume that an effective precipitation pH corresponding to a peat soil solution pH at which vegetation communities are not significantly adversely effected could be used to set critical loads. The results of this study suggest that the appropriate value is pH 3.6 The long-term effect of acid deposition on peat soil solution pH over the 6-year time span of the experiment indicated trends towards equilibria (Parveen et al, 2001). The most recent samples showed very small differences to values recorded previously.…”

Section: Treatment Effects On Soil Solution Phmentioning

confidence: 49%

“…After 6 years of acid deposition treatments, highly significant (P , 0.05) treatment effects on mean Ca 2þ concentration in soil solution were found. Consistent with Parveen et al (2001), treatment effects up to H4 resulted in significant enhancement of Ca 2þ concentration in soil solution, but the effect was not sustained to H5. At this gross acidity, the majority of Ca 2þ was leached out.…”

Section: Effects Of Enhanced Sulphuric Acid Deposition On Soil Solutionmentioning

confidence: 57%

“…He showed that the pH values of peat soil solution equalled almost exactly the effective rain pH values at the sites from which the peat had been collected. Further evidence to support this observation is provided by Proctor and Maltby (1998) from their work on pools in peat bogs, and from a 3-year experiment in which simulated acid rain was applied to Calluna/peat microcosms (Parveen et al, 2001).…”

Section: Introductionmentioning

confidence: 92%

“…Drainage water was also analysed periodically. Parveen et al (2001) provide full details of the experimental design and methodology used and the initial treatment effects on the growth of Calluna and on the chemistry of the pre-harvest soil solutions.…”

Section: Microcosm Experimentsmentioning

confidence: 99%

“…Soil solution sampling and analysis for pH, base cations, ammonium and nitrate were carried out as described by Parveen et al (2001). All analysis was completed within 6 d of sampling…”

Section: Current Datamentioning

confidence: 99%

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Tolerance ofcalluna vulgarisand peatland plant communities to sulphuric acid deposition

Calver¹,

Cresser²,

Smart³

2004

Chemistry and Ecology

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Critical loads offer a unique way of evaluating impacts of acid deposition by quantifying environmental sensitivity. The critical loads of acidity for UK peat soils have been based upon an arbitrary reduction in pH of 0.2 units. This chemical shift needs to be better related to adverse effects on sensitive biological receptors. It is known that effective precipitation pH equates closely to soil solution pH, and the latter is directly linkable to biotic effects of pH change. On continuation of a long-term experiment assessing impacts of simulated acid rain on peat microcosms in a realistic outdoor environment, Calluna vulgaris continued to flourish at acid deposition loads well above the existing critical load. Calluna plants were harvested and analysed, and acid deposition treatments to the microcosms continued to allow natural vegetation to regenerate. A diverse mixture of moorland plants and bryophytes established at acidity treatments well above the existing critical load, and only a very high acid load resulted in no natural regeneration. A critical effective rain pH value of 3.6 is suggested as a basis for setting critical loads. At this pH, Calluna grows well, and a healthy diverse vegetation community re-establishes when harvested. It is suggested that the peat critical load should be set at the acid load that, at any specific site, would result in a mean effective precipitation pH of 3.6.

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Section: Treatment Effects On Soil Solution Phmentioning

confidence: 49%

Section: Effects Of Enhanced Sulphuric Acid Deposition On Soil Solutionmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 92%

Section: Microcosm Experimentsmentioning

confidence: 99%

“…Soil solution sampling and analysis for pH, base cations, ammonium and nitrate were carried out as described by Parveen et al (2001). All analysis was completed within 6 d of sampling…”

Section: Current Datamentioning

confidence: 99%

See 3 more Smart Citations