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Kitao, M.* ; Winkler, J.B. ; Löw, M.* ; Nunn, A.J.* ; Kuptz, D.* ; Häberle, K.-H.* ; Reiter, I.M.* ; Matyssek, R.*

How closely does stem growth of adult beech (Fagus sylvatica) relate to net carbon gain under experimentally enhanced ozone stress?

Environ. Pollut. 166, 108-115 (2012)

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The hypothesis was tested that O-3-induced changes in leaf-level photosynthetic parameters have the capacity of limiting the seasonal photosynthetic carbon gain of adult beech trees. To this end, canopy-level photosynthetic carbon gain and respiratory carbon loss were assessed in European beech (Fagus sylvatica) by using a physiologically based model, integrating environmental and photosynthetic parameters. The latter were derived from leaves at various canopy positions under the ambient O-3 regime, as prevailing at the forest site (control), or under an experimental twice-ambient O-3 regime (elevated O-3), as released through a free-air canopy O-3 fumigation system. Gross carbon gain at the canopy-level declined by 1.7%, while respiratory carbon loss increased by 4.6% under elevated O-3. As this outcome only partly accounts for the decline in stem growth, O-3-induced changes in allocation are referred to and discussed as crucial in quantitatively linking carbon gain with stem growth.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Free-air Fumigation; Forest Trees; Photosynthetic Capacity; Mature Trees; O-3 Exposure; Picea-abies; Young Beech; Long-term; Spruce; Light; Adult Forest Trees; Long-term Free-air O-3 Fumigation; Fagus Sylvatica; Light Gradient; Seasonal Carbon Balance; FREE-AIR FUMIGATION; FOREST TREES; PHOTOSYNTHETIC CAPACITY; MATURE TREES; O-3 EXPOSURE; PICEA-ABIES; YOUNG BEECH; LONG-TERM; SPRUCE; LIGHT

ISSN (print) / ISBN 0269-7491

e-ISSN 1873-6424

Journal Environmental Pollution

Quellenangaben Volume: 166, Pages: 108-115

Publisher Elsevier

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Research Unit Environmental Simulation (EUS)