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Simultaneous inhibition of CH4 efflux and stimulation of sulphate reduction in peat subject to simulated acid rain

Gauci, Vincent and Chapman, Stephen J. (2006). Simultaneous inhibition of CH4 efflux and stimulation of sulphate reduction in peat subject to simulated acid rain. Soil Biology and Biochemistry, 38(12) pp. 3506–3510.

URL: http://cepsar.open.ac.uk/pers/v.gauci/pics/d62057....
DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1016/j.soilbio.2006.05.011
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Abstract

Acid rain sulphate (SO42-) deposition is a known suppressant of methane (CH4) emission from wetlands. However, the hypothesised mechanism responsible for this important biogeochemical interaction, competitive exclusion of methanogens by dissimilatory SO42- reducing bacteria (SRB), lacks supporting evidence. Here we present data from an acid rain simulation experiment in the Moidach More peat bog of NE Scotland that strengthens this hypothesis. We report a tenfold increase in estimated SO42- reduction during periods when measured CH4 emission rates were suppressed relative to controls receiving only one-tenth the SO42- of treated plots but no treatment effect on potential methane oxidation. This tenfold increase in estimated SO42- reduction indicates the presence of a more active population of SRB in plots where CH4 emissions were reduced by over 30%.

Item Type: Journal Article
ISSN: 0038-0717
Extra Information: Some of the symbols may not have transferred correctly into this bibliographic record and/or abstract.
Keywords: methane; sulfate; sulphate; sulphate reduction; peatlands; wetlands; emissions; acid rain; Methane; Sulphate; Sulfate; Sulphate reduction; Sulphate reduction; bacteria; SRB; Methanogens; bogs; atmosphere; competitive exclusion
Academic Unit/Department: Science > Environment, Earth and Ecosystems
Interdisciplinary Research Centre: OpenSpace Research Centre (OSRC)
Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 5888
Depositing User: Vincent Gauci
Date Deposited: 15 Nov 2006
Last Modified: 02 Dec 2010 19:55
URI: http://oro.open.ac.uk/id/eprint/5888
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