Promoting the O(3) flux concept for European forest trees

作者：Matyssek R^*; Bytnerowicz A; Karlsson P E; Paoletti E; Sanz M; Schaub M; Wieser G

来源：Environmental Pollution, 2007, 146(3): 587-607.

DOI：10.1016/j.envpol.2006.11.011

• ozone flux
• uptake
• exposure
• effective ozone dose
• ozone defence
• whole-tree
• canopy
• xylem sap flow
• drought
• soil moisture
• light
• central
• eastern
• northern
• southern Europe

Tropospheric ozone (O(3)) levels are predicted to stay high, being a factor within "global change" with potential effects on the carbon sink strength of forest trees. Hence, new approaches to O(3) risk assessment and their validation are required, although appropriate databases for adult trees are scant. Approaches based on external O(3) exposure are presently being evaluated against the ones on O(3) flux into leaves, as the cumulative uptake has the capacity for deriving O(3) risk from cause-effect relationships. The effective dose, however, needs to account for the trees' O(3) defence and tolerance in addition to O(3) uptake. The current status of promoting the preferable mechanistic O(3) flux concept is highlighted for major regions of Europe, addressing refinements and simplifications needed for routine use. At the pan-European scale, however, the flux-based concept is ready for use in O(3) risk assessment and has the potential of meso-scale application at the forest ecosystem level.

• 出版日期2007-4