The DOI matches its Crossref record; 59 of the 59 references it cites were found in a registry or an index.
Acidity controls on dissolved organic carbon mobility in organic soils
Abstract
Dissolved organic carbon (DOC) concentrations in surface waters have increased across much of E urope and N orth A merica, with implications for the terrestrial carbon balance, aquatic ecosystem functioning, water treatment costs and human health. Over the past decade, many hypotheses have been put forward to explain this phenomenon, from changing climate and land management to eutrophication and acid deposition. Resolution of this debate has been hindered by a reliance on correlative analyses of time series data, and a lack of robust experimental testing of proposed mechanisms. In a 4 year, four‐site replicated field experiment involving both acidifying and deacidifying treatments, we tested the hypothesis that DOC leaching was previously suppressed by high levels of soil acidity in peat and organo‐mineral soils, and therefore that observed DOC increases a consequence of decreasing soil acidity. We observed a consistent, positive relationship between DOC and acidity change at all sites. Responses were described by similar hyperbolic relationships between standardized changes in DOC and hydrogen ion concentrations at all sites, suggesting potentially general applicability. These relationships explained a substantial proportion of observed changes in peak DOC concentrations in nearby monitoring streams, and application to a UK‐wide upland soil p H dataset suggests that recovery from acidification alone could have led to soil solution DOC increases in the range 46–126% by habitat type since 1978. Our findings raise the possibility that changing soil acidity may have wider impacts on ecosystem carbon balances. Decreasing sulphur deposition may be accelerating terrestrial carbon loss, and returning surface waters to a natural, high‐DOC condition.
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Cites
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BackgroundExport of organic carbon from peat soils
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Controls of dissolved organic matter quality: evidence from a large‐scale boreal lake survey
Kothawala, D. N., Stedmon, C. A., Müller, R. A., Weyhenmeyer, G. A., Köhler, S. J., & Tranvik, L. J. (2014) · Global Change Biology · doi:10.1111/gcb.12488 · Cited by 396
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Rice paddy soils are a quantitatively important carbon store according to a global synthesis
Liu, Y., Ge, T., van Groenigen, K. J., Yang, Y., Wang, P., Cheng, K., Zhu, Z., Wang, J., Li, Y., Guggenberger, G., et al. (2021) · Communications Earth & Environment · doi:10.1038/s43247-021-00229-0 · Cited by 269
Aerosol Deposition Impacts on Land and Ocean Carbon Cycles
Mahowald, N. M., Scanza, R., Brahney, J., Goodale, C. L., Hess, P. G., Moore, J. K., & Neff, J. (2017) · Current Climate Change Reports · doi:10.1007/s40641-017-0056-z · Cited by 181
The role of waterborne carbon in the greenhouse gas balance of drained and re-wetted peatlands
Evans, C. D., Renou-Wilson, F., & Strack, M. (2016) · Aquatic Sciences · doi:10.1007/s00027-015-0447-y · Cited by 139
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Metadata
- Authors
- Evans, C. D., Jones, T. G., Burden, A., Ostle, N., Zieliński, P., Cooper, M. D. A., Peacock, M., Clark, J. M., Oulehle, F., Cooper, D., & Freeman, C.
- Venue
- Global Change Biology
- Publisher
- Wiley
- Published
- 2012-09
- Volume
- 18
- Issue
- 11
- Pages
- 3317-3331
- ISSN
- 1354-1013 (ISSN-L)
- 1365-2486
- OpenAlex
- W2141896431
- Cited by
- 300
- References
- 59
- FWCI
- 23.37
- Type
- journal article
- Language
- en
- Open access
- closed
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