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Open Access Green as soon as Postprint is submitted to ZB.
Enhanced ozone strongly reduces carbon sink strength of adult beech (Fagus sylvatica) - resume from the free-air fumigation study at Kranzberg Forest.
Environ. Pollut. 158, 2527-2532 (2010)
Ground-level ozone (O(3)) has gained awareness as an agent of climate change. In this respect, key results are comprehended from a unique 8-year free-air O(3)-fumigation experiment, conducted on adult beech (Fagus sylvatica) at Kranzberg Forest (Germany). A novel canopy O(3) exposure methodology was employed that allowed whole-tree assessment in situ under twice-ambient O(3) levels. Elevated O(3) significantly weakened the C sink strength of the tree-soil system as evidenced by lowered photosynthesis and 44% reduction in whole-stem growth, but increased soil respiration. Associated effects in leaves and roots at the gene, cell and organ level varied from year to year, with drought being a crucial determinant of O(3) responsiveness. Regarding adult individuals of a late-successional tree species, empirical proof is provided first time in relation to recent modelling predictions that enhanced ground-level O(3) can substantially mitigate the C sequestration of forests in view of climate change.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Ozone; Fagus sylvatica; Stem production; Soil respiration; Flux
ISSN (print) / ISBN
0269-7491
e-ISSN
1873-6424
Journal
Environmental Pollution
Quellenangaben
Volume: 158,
Issue: 8,
Pages: 2527-2532
Publisher
Elsevier
Reviewing status
Peer reviewed
Institute(s)
Institute of Biochemical Plant Pathology (BIOP)