Krepkowski J, Bräuning A, Gebrekirstos A (2012)
Publication Language: English
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2012
Publisher: Elsevier
Book Volume: 30
Pages Range: 257-265
Journal Issue: 4
URI: http://www.sciencedirect.com/science/article/pii/S1125786512000380
DOI: 10.1016/j.dendro.2012.01.001
Podocarpus falcatus is an indigenous evergreen conifer species of tropical mountain forests in southeastern Ethiopia, showing potential tree ages of around 500 years. To study the influence of seasonal climate on the growth pattern of P. falcatus, we combined high-resolution electronic dendrometer measurements with wood anatomical investigations of microcores from the outermost stem parts collected in monthly intervals. At any time of the year sufficient rain events are able to cause cambial activity in P. falcatus. This permanent growing readiness leads to irregular wood formation with the formation of intra-annual density fluctuations and missing rings. Wood anatomical studies of microcores collected around the circumference of a mature P. falcatus revealed locally different activity status of the cambium on different lobes of the stem. Tree-ring width measurements of stem disks resulted in tentative tree ages that were confirmed by radiocarbon dating of selected wood samples. Although our efforts to cross-date ring-width series from several stem disks were not successful, further sampling in areas with different rainfall regimes, additional radiocarbon dating and measurements of stable isotopes hopefully would enable the establishment of a multi-century-long tree-ring series for climate reconstruction.
APA:
Krepkowski, J., Bräuning, A., & Gebrekirstos, A. (2012). Growth dynamics and potential for cross-dating and multi-century climate reconstruction of Podocarpus falcatus in Ethiopia. Dendrochronologia, 30(4), 257-265. https://doi.org/10.1016/j.dendro.2012.01.001
MLA:
Krepkowski, Julia, Achim Bräuning, and Aster Gebrekirstos. "Growth dynamics and potential for cross-dating and multi-century climate reconstruction of Podocarpus falcatus in Ethiopia." Dendrochronologia 30.4 (2012): 257-265.
BibTeX: Download