Enhanced ozone strongly reduces carbon sink strength of adult beech (Fagus sylvatica) - Resume from the free-air fumigation study at Kranzberg Forest

R. Matyssek, G. Wieser, R. Ceulemans, H. Rennenberg, H. Pretzsch, K. Haberer, M. Löw, A. J. Nunn, H. Werner, P. Wipfler, W. Oßwald, P. Nikolova, D. E. Hanke, H. Kraigher, M. Tausz, G. Bahnweg, M. Kitao, J. Dieler, H. Sandermann, K. HerbingerT. Grebenc, M. Blumenröther, G. Deckmyn, T. E.E. Grams, C. Heerdt, M. Leuchner, P. Fabian, K. H. Häberle

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

129 Zitate (Scopus)

Abstract

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.

OriginalspracheEnglisch
Seiten (von - bis)2527-2532
Seitenumfang6
FachzeitschriftEnvironmental Pollution
Jahrgang158
Ausgabenummer8
DOIs
PublikationsstatusVeröffentlicht - Aug. 2010

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