New flux based dose-response relationships for ozone for European forest tree species

Buker, P.; Feng, Z.; Uddling, J.; Briolat, A.; Alonso, R.; Braun, S.; Elvira, S.; Gerosa, G.; Karlsson, P.E.; Le Thiec, D.; Marzouli, R.; Mills, G.; Oksanen, E.; Wieser, G.; Wlikinson, M.; Emberson, L.D.. 2015 New flux based dose-response relationships for ozone for European forest tree species. Environmental Pollution, 206. 163-174.

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To derive O3 dose–response relationships (DRR) for five European forest trees species and broadleaf deciduous and needleleaf tree plant functional types (PFTs), phytotoxic O3 doses (PODy) were related to biomass reductions. PODy was calculated using a stomatal flux model with a range of cut-off thresholds (y) indicative of varying detoxification capacities. Linear regression analysis showed that DRR for PFT and individual tree species differed in their robustness. A simplified parameterisation of the flux model was tested and showed that for most non-Mediterranean tree species, this simplified model led to similarly robust DRR as compared to a species- and climate region-specific parameterisation. Experimentally induced soil water stress was not found to substantially reduce PODy, mainly due to the short duration of soil water stress periods. This study validates the stomatal O3 flux concept and represents a step forward in predicting O3 damage to forests in a spatially and temporally varying climate.

Item Type: Publication - Article
Digital Object Identifier (DOI):
UKCEH and CEH Sections/Science Areas: Emmett
ISSN: 0269-7491
Additional Keywords: trees, ozone flux, dose–response relationships, model-based risk assessment
NORA Subject Terms: Ecology and Environment
Atmospheric Sciences
Date made live: 19 Jan 2016 15:48 +0 (UTC)

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