Ozone impacts on vegetation in a nitrogen enriched and changing climate

Mills, Gina; Harmens, Harry; Wagg, Serena; Sharps, Katrina; Hayes, Felicity; Fowler, David; Sutton, Mark; Davies, Bill. 2016 Ozone impacts on vegetation in a nitrogen enriched and changing climate. Environmental Pollution, 208 (B). 898-908.

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This paper provides a process-oriented perspective on the combined effects of ozone (O3), climate change and/or nitrogen (N) on vegetation. Whereas increasing CO2 in controlled environments or opentop chambers often ameliorates effects of O3 on leaf physiology, growth and C allocation, this is less likely in the field. Combined responses to elevated temperature and O3 have rarely been studied even though some critical growth stages such as seed initiation are sensitive to both. Under O3 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 O3 treatments whilst the effects of increasing O3 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: Publication - Article
Digital Object Identifier (DOI):
UKCEH and CEH Sections/Science Areas: Dise
ISSN: 0269-7491
Additional Keywords: ozone, nitrogen, climate change, drought, vegetation
NORA Subject Terms: Ecology and Environment
Atmospheric Sciences
Related URLs:
Date made live: 10 Nov 2015 10:53 +0 (UTC)

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