Tissue-specific variation of delta C-13 in mature canopy trees in a temperate forest in central Europe

Chevillat, Veronique S. and Siegwolf, Rolf T. W. and Pepin, Steeve and Körner, Christian. (2005) Tissue-specific variation of delta C-13 in mature canopy trees in a temperate forest in central Europe. Basic and applied ecology, Vol. 6, H. 6. pp. 519-534.

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Official URL: http://edoc.unibas.ch/dok/A5249042

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Stable carbon isotope analysis has become a key toot in functional ecology, yet considerable natural variability often limits the interpretations. In this study we document the spatial, taxonomic, temporal and tissue-specific delta(13)C variability in 10 tree species of a temperate European forest. The Swiss Canopy Crane provided access to the three dimensional space within 55 trees 30-35 m high representing the genera Acer, Carpinus, Fagus, Prunus, Quercus, Tilia, Abies, Larix, Picea and Pinus. The results from six broad-leaved and four conifer species (seven deciduous, three evergreen) documented that the species effect was not significant in contrast to tissue-specific and spatial differences in the canopy. Year-to-year differences were not large but still significant. Our analysis confirmed a significant difference between delta(13)C of foliage collected in the upper and lower canopy, but revealed no systematic differences with respect to azimuthal directions in tree crowns of the broad-leaved trees, as opposed to the conifers, which show clear differences between the sun-exposed and the shaded side. Tissue-specific differences were significant, despite surprisingly similar mean values for most tissue types. Such tissue effect was largely due to young branch xylem, which exhibited a systematic less negative deviation from the other tissue types. These findings were consistent across the species tested and provided some guidelines towards a representative sampling strategy for 13 C analysis.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Ehemalige Einheiten Umweltwissenschaften > Pflanzenökologie (Körner)
UniBasel Contributors:Körner, Christian
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:25
Deposited On:22 Mar 2012 13:45

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