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Effects of summer drought on peat soil solution chemistry in an acid gully mire

Hughes, S.; Reynolds, B.; Hudson, J.A.; Freeman, C.. 1997 Effects of summer drought on peat soil solution chemistry in an acid gully mire. Hydrology and Earth System Sciences, 1 (3). 661-669.

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Abstract/Summary

In a field experiment to investigate potential impacts of climatic change, a small area of flush wetland in Wales was subjected to three successive years of simulated summer drought/rewetting (autumn-spring) cycles (1992–94). Drought was simulated achieved by diverting stream water around the experimental wetland during the summer, so that the wetland received only precipitation inputs during that time. The effects on peat-water chemistry in the rhizosphere were monitored at regular intervals until spring 1996, and comparisons made with a control. Simulated summer drought decreased, significantly, the natural summer peaks in dissolved organic carbon (DOC) and iron, whilst subsequently increasing the natural autumn-winter peaks in sulphate concentrations and acidity in the peat water. The effects of simulated drought on SO4 concentrations in the peat water compared favourably with subsequent events monitored following a natural summer drought in 1995. Autumn-winter peaks in SO4 concentrations in the control wetland following the natural drought were of similar magnitude to those induced by the drought simulated in the experimental wetland in the previous three years.

Item Type: Publication - Article
Programmes: CEH Programmes pre-2009 publications > Other
CEH Sections: _ Pre-2000 sections
ISSN: 1027-5606
Additional Keywords: Peat, Soil chemistry
NORA Subject Terms: Agriculture and Soil Science
Atmospheric Sciences
Date made live: 02 Jun 2009 07:37
URI: http://nora.nerc.ac.uk/id/eprint/7339

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