New stomatal flux-based critical levels for ozone effects on vegetation
Journal article, 2011

The critical levels for ozone effects on vegetation have been reviewed and revised by the LRTAP Convention. Eight new or revised critical levels based on the accumulated stomatal flux of ozone (POD gamma, the Phytotoxic Ozone Dose above a threshold flux of Y nmol m(-2) PLA s(-1), where PLA is the projected leaf area) have been agreed. For each receptor, data were combined from experiments conducted under naturally fluctuating environmental conditions in 2-4 countries, resulting in linear dose response relationships with response variables specific to each receptor (r(2) = 0.49-0.87, p < 0.001 for all). For crops, critical levels were derived for effects on wheat (grain yield, grain mass, and protein yield), potato (tuber yield) and tomato (fruit yield). For forest trees, critical levels were derived for effects on changes in annual increment in whole tree biomass for beech and birch, and Norway spruce. For (semi-)natural vegetation, the critical level for effects on productive and high conservation value perennial grasslands was based on effects on important component species of the genus Trifolium (clover species). These critical levels can be used to assess protection against the damaging effects of ozone on food security, important ecosystem services provided by forest trees (round-wood production, C sequestration, soil stability and flood prevention) and the vitality of pasture.

Ozone

Grasslands

Food security

forest trees

quality

risk-assessment

beech

sensitivity

Critical levels

response relationships

Flux

conductance

europe

fagus-sylvatica

Ecosystem services

Trees

exposure

Author

G. Mills

UK Centre For Ecology & Hydrology (UKCEH)

H. Pleijel

University of Gothenburg

S. Braun

P. Buker

University of York

V. Bermejo

Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas (Ciemat)

E. Calvo

Fundación CEAM

H. Danielsson

IVL Swedish Environmental Research Institute

L. Emberson

University of York

I. G. Fernandez

Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas (Ciemat)

L. Grunhage

Justus Liebig University Giessen

H. Harmens

UK Centre For Ecology & Hydrology (UKCEH)

F. Hayes

UK Centre For Ecology & Hydrology (UKCEH)

P. E. Karlsson

IVL Swedish Environmental Research Institute

David Simpson

Chalmers, Earth and Space Sciences, Global Environmental Measurements and Modelling

Atmospheric Environment

1352-2310 (ISSN) 1873-2844 (eISSN)

Vol. 45 28 5064-5068

ModElling the Regional and Global Earth system (MERGE)

Lund University (9945095), 2010-01-01 -- .

Subject Categories

Earth and Related Environmental Sciences

DOI

10.1016/j.atmosenv.2011.06.009

More information

Latest update

10/14/2024