Stable carbon isotope labeling reveals different carry-over effects between functional types of tropical trees in an Ethiopian mountain forest
Krepkowski J, Gebrekirstos A, Shibistova O, Bräuning A (2013)
Publication Language: English
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2013
Journal
Publisher: Wiley-Blackwell
Book Volume: 199
Pages Range: 441-451
Journal Issue: 2
URI: http://onlinelibrary.wiley.com/doi/10.1111/nph.12266/abstract
DOI: 10.1111/nph.12266
Open Access Link: http://onlinelibrary.wiley.com/doi/10.1111/nph.12266/pdf
Abstract
We present an intra-annual stable carbon isotope (δC) study based on a labeling experiment to illustrate differences in temporal patterns of recent carbon allocation to wood structures of two functional types of trees, Podocarpus falcatus (a late-successional evergreen conifer) and Croton macrostachyus (a deciduous broadleaved pioneer tree), in a tropical mountain forest in Ethiopia. Dendrometer data, wood anatomical thin sections, and intra-annual δC analyses were applied. Isotope data revealed a clear annual growth pattern in both studied species. For P. falcatus, it was possible to synchronize annual δC peaks, wood anatomical structures and monthly precipitation patterns. The labeling signature was evident for three consecutive years. For C. macrostachyus, isotope data illustrate a rapid decline of the labeling signal within half a year. Our δC labeling study indicates a distinct difference in carryover effects between trees of different functional types. A proportion of the labeled δC is stored in reserves of wood parenchyma for up to 3 yr in P. falcatus. By contrast, C. macrostachyus shows a high turnover of assimilates and a carbon carryover effect is only detectable in the subsequent year.
Authors with CRIS profile
Julia Krepkowski
Lehrstuhl für Geographie (Physische Geographie)
Achim Bräuning
Lehrstuhl für Geographie (Physische Geographie)
Involved external institutions
Germany (DE)How to cite
APA:
Krepkowski, J., Gebrekirstos, A., Shibistova, O., & Bräuning, A. (2013). Stable carbon isotope labeling reveals different carry-over effects between functional types of tropical trees in an Ethiopian mountain forest. New Phytologist, 199(2), 441-451. https://doi.org/10.1111/nph.12266
MLA:
Krepkowski, Julia, et al. "Stable carbon isotope labeling reveals different carry-over effects between functional types of tropical trees in an Ethiopian mountain forest." New Phytologist 199.2 (2013): 441-451.
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