Search National Agricultural Library Digital Collections

NALDC Record Details:

The challenge of making ozone risk assessment for forest trees more mechanistic

Permanent URL:
http://handle.nal.usda.gov/10113/23602
Abstract:
Upcoming decades will experience increasing atmospheric CO2 and likely enhanced O3 exposure which represents a risk for the carbon sink strength of forests, so that the need for cause-effect related O3 risk assessment increases. Although assessment will gain in reliability on an O3 uptake basis, risk is codetermined by the effective dose, i.e. the plant's sensitivity per O3 uptake. Recent progress in research on the molecular and metabolic control of the effective O3 dose is reported along with advances in empirically assessing O3 uptake at the whole-tree and stand level. Knowledge on both O3 uptake and effective dose (measures of stress avoidance and tolerance, respectively) needs to be understood mechanistically and linked as a pre-requisite before practical use of process-based O3 risk assessment can be implemented. To this end, perspectives are derived for validating and promoting new O3 fluxbased modelling tools.
Author(s):
Matyssek, R. , Sandermann, H. , Wieser, G. , Booker, F. , Cieslik, S. , Musselman, R. , Ernst, D.
Subject(s):
ozone , air pollution , risk assessment , forest trees , dose response , mechanistic models , equations , uptake mechanisms , literature reviews
Format:
p. 567-582.
Note:
Includes references
Source:
Environmental pollution 2008 Dec., v. 156, issue 3
Language:
English
Year:
2008
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
File:
Download [PDF File]
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.