High-resolution time series of vessel density in Kenyan mangrove trees reveal a link with climate
Article first published online: 31 MAR 2005
Volume 167, Issue 2, pages 425–435, August 2005
How to Cite
Verheyden, A., De Ridder, F., Schmitz, N., Beeckman, H. and Koedam, N. (2005), High-resolution time series of vessel density in Kenyan mangrove trees reveal a link with climate. New Phytologist, 167: 425–435. doi: 10.1111/j.1469-8137.2005.01415.x
- Issue published online: 31 MAR 2005
- Article first published online: 31 MAR 2005
- Received: 12 December 2004 Accepted: 15 February 2005
- East Africa;
- Rhizophora mucronata;
- spectral analysis;
- tree rings;
- wood anatomy
- • Tropical trees are often excluded from dendrochronological investigations because of a lack of distinct growth ring boundaries, causing a gap in paleoclimate reconstructions from tropical regions.
- • The potential use of time series of vessel features (density, diameter, surface area and hydraulic conductivity) combined with spectral analysis as a proxy for environmental conditions in the mangrove Rhizophora mucronata was investigated.
- • Intra-annual differences in the vessel features revealed a trade-off between hydraulic efficiency (large vessels) during the rainy season and hydraulic safety (small, more numerous vessels) during the dry season. In addition to the earlywood–latewood variations, a semiannual signal was discovered in the vessel density and diameters after Fourier transformation.
- • The similarity in the Fourier spectra of the vessel features and the climate data, in particular mean relative humidity and precipitation, provides strong evidence for a climatic driving force for the intra-annual variability of the vessel features. The high-resolution approach used in this study, in combination with spectral analysis, may have great potential for the study of climate variability in tropical regions.