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Enhanced ozone strongly reduces carbon sink strength of adult beech (**Fagus sylvatica**): resume from the free-air fumigation study at Kranzberg Forest
- Source :
- Environmental pollution
- Publication Year :
- 2010
-
Abstract
- Ground-level ozone (O3) has gained awareness as an agent of climate change. In this respect, key results are comprehended from a unique 8-year free-air O3-fumigation experiment, conducted on adult beech (Fagus sylvatica) at Kranzberg Forest (Germany). A novel canopy O3 exposure methodology was employed that allowed whole-tree assessment in situ under twice-ambient O3 levels. Elevated O3 significantly weakened the C sink strength of the treesoil 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 O3 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 O3 can substantially mitigate the C sequestration of forests in view of climate change. Empirical proof corroborates substantial mitigation of carbon sequestration in the treesoil system of a forest site under enhanced O3 impact for adult beech.
- Subjects :
- Canopy
Air Pollutants
biology
Ecology
Health, Toxicology and Mutagenesis
Carbon sink
General Medicine
Carbon sequestration
Toxicology
biology.organism_classification
Pollution
Carbon
Fagaceae
Trees
Soil respiration
Ozone
Fagus sylvatica
Agronomy
Germany
Forest ecology
Fagus
Environmental science
Photosynthesis
Beech
Biology
Subjects
Details
- Language :
- English
- ISSN :
- 02697491
- Database :
- OpenAIRE
- Journal :
- Environmental pollution
- Accession number :
- edsair.doi.dedup.....593fb8a52aced56802dd0b5f18652edb