Species-specific effects of elevated ozone on wetland plants and decomposition processes

Williamson, Jennifer ORCID:; Mills, Gina; Freeman, Chris. 2010 Species-specific effects of elevated ozone on wetland plants and decomposition processes. Environmental Pollution, 158 (5). 1197-1206.

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Seven species from two contrasting wetlands, an upland bog and a lowland rich fen in North Wales, UK, were exposed to elevated ozone (150 ppb for 5 days and 20 ppb for 2 days per week) or low ozone (20 ppb) for four weeks in solardomes. The rich fen species were: Molinia caerulea, Juncus subnodulosus, Potentilla erecta and Hydrocotyle vulgaris and the bog species were: Carex echinata, Potentilla erecta and Festuca rubra. Senescence significantly increased under elevated ozone in all seven species but only Molinia caerulea showed a reduction in biomass under elevated ozone. Decomposition rates of plants exposed to elevated ozone, as measured by carbon dioxide efflux from dried plant material inoculated with peat slurry, increased for Potentilla erecta with higher hydrolytic enzyme activities. In contrast, a decrease in enzyme activities and a non-significant decrease in carbon dioxide efflux occurred in the grasses, sedge and rush species. Short-term, episodic ozone exposure increased senescence and changed decomposition processes in wetland plant species.

Item Type: Publication - Article
Digital Object Identifier (DOI):
Programmes: CEH Topics & Objectives 2009 - 2012 > Biogeochemistry > BGC Topic 1 - Monitoring and Interpretation of Biogeochemical and Climate Changes > BGC - 1.3 - Quantify & attribute changes in biogeochemiical cycles ...
UKCEH and CEH Sections/Science Areas: Emmett
ISSN: 0269-7491
Additional Information. Not used in RCUK Gateway to Research.: The definitive version of this article is available from
NORA Subject Terms: Ecology and Environment
Date made live: 17 May 2010 15:08 +0 (UTC)

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