TY - JOUR

T1 - Ozone impacts on vegetation in a nitrogen enriched and changing climate

AU - Wagg, S.K.

AU - Mills, G.

AU - Harmens, H.

AU - Wagg, S.

AU - Sharps, K.

AU - Hayes, F.

AU - Fowler, D.

AU - Sutton, M.

AU - Davies, B.

PY - 2015/9/26

Y1 - 2015/9/26

N2 - 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.

AB - 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.

U2 - 10.1016/j.envpol.2015.09.038

DO - 10.1016/j.envpol.2015.09.038

M3 - Article

VL - 208

SP - 898

EP - 908

JO - Environmental Pollution

JF - Environmental Pollution

SN - 0269-7491

IS - Part B

ER -