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Ozone impacts on vegetation in a nitrogen enriched and changing climate

Mills, G. and Harmens, H. and Wagg, S. and Sharps, K. and Hayes, F. and Fowler, D. and Sutton, M. and Davies, B. (2015) Ozone impacts on vegetation in a nitrogen enriched and changing climate. Environmental Pollution, 208 (Part B). pp. 898-908. DOI: 10.1016/j.envpol.2015.09.038

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Abstract

This paper provides a process-oriented perspective on the combined effects of ozone (O-3), climate change and/or nitrogen (N) on vegetation. Whereas increasing CO2 in controlled environments or opentop chambers often ameliorates effects of O-3 on leaf physiology, growth and C allocation, this is less likely in the field. Combined responses to elevated temperature and O-3 have rarely been studied even though some critical growth stages such as seed initiation are sensitive to both. Under O-3 exposure, many species have smaller roots, thereby enhancing drought sensitivity. Of the 68 species assessed for stomatal responses to ozone, 22.5% were unaffected, 33.5% had sluggish or increased opening and 44% stomatal closure. The beneficial effect of N on root development was lost at higher O-3 treatments whilst the effects of increasing O-3 on root biomass became more pronounced as N increased. Both responses to gradual changes in pollutants and climate and those under extreme weather events require further study.

Item Type: Article
Subjects: Research Publications
Departments: College of Natural Sciences > School of Biological Sciences
Date Deposited: 01 Mar 2016 03:41
Last Modified: 01 Mar 2016 03:41
ISSN: 0269-7491
URI: http://e.bangor.ac.uk/id/eprint/6273
Identification Number: DOI: 10.1016/j.envpol.2015.09.038
Publisher: Elsevier
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