Risk assessments for forest trees: The performance of the ozone flux versus the AOT concept
2007
Karlsson, P.E. | Braun, Stephane | Broadmeadow, M. | Elvira, S. | Emberson, Lisa | Gimeno, B.S. | Le Thiec, Didier | Novak, K. | Oksanen, Elina | Schaub, M. | Uddling, J. | Wilkinson, M. | Swedish Environmental Research Institute (IVL) | Institute for Applied Plant Biology ; Partenaires INRAE | Forest Research [Great Britain] | Ecotoxicidad de la Contaminacion Atmosferica ; Partenaires INRAE | University of York | Ecologie et Ecophysiologie Forestières [devient SILVA en 2018] (EEF) ; Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL) | Swiss Federal Institute for Forest, Snow and Landscape Research WSL | University of Joensuu | Department of Plant and Environmental Sciences ; Göteborgs Universitet = University of Gothenburg (GU)
International audience
显示更多 [+] 显示较少 [-]英语. Published ozone exposureeresponse relationships from experimental studies with young trees performed at different sites across Europe were re-analysed in order to test the performance of ozone exposure indices based on AOTX (Accumulated exposure Over a Threshold of X nmol mol_1) and AFstY (Accumulated Stomatal Flux above a threshold of Y nmol m_2 s_1). AFst1.6 was superior, as compared to AOT40, for explaining biomass reductions, when ozone sensitive species with differing leaf morphology were included in the analysis, while this was not the case for less sensitive species. A re-analysis of data with young black cherry trees, subject to different irrigation regimes, indicated that leaf visible injuries were more strongly related to the estimated stomatal ozone uptake, as compared to the ozone concentration in the air. Experimental data with different clones of silver birch indicated that leaf thickness was also an important factor influencing the development of ozone induced leaf visible injury.
显示更多 [+] 显示较少 [-]