Linking wood density with tree growth and environment: a theoretical analysis based on the motion of water
Article first published online: 4 JAN 2002
Volume 149, Issue 3, pages 473–485, March 2001
How to Cite
Roderick, M. L. and Berry, S. L. (2001), Linking wood density with tree growth and environment: a theoretical analysis based on the motion of water. New Phytologist, 149: 473–485. doi: 10.1046/j.1469-8137.2001.00054.x
- Issue published online: 4 JAN 2002
- Article first published online: 4 JAN 2002
- Received: 4 September 2000Accepted: 9 October 2000
- elevated CO2;
- nitrogen fertilization;
- tree hydraulics;
- water temperature;
- wood density
• An hydraulic model of a tree stem is presented to help understand how the carbon storage in ecosystems varies with changing environmental conditions.
• The model is based on the assumption that a tree stem is a collection of parallel pipes and was used to (qualitatively) predict how the mass concentration of dry matter ([D]) would vary with water temperature (via changes in viscosity), nitrogen supply and atmospheric CO2.
• There was qualitative agreement between model predictions and observed gross trends. The model predicted that the flow rate would be relatively insensitive to variations in [D] in angiosperm stems; this was consistent with observations. It is concluded that other factors need to be considered to explain variations in [D] in angiosperm wood. The flow rate of water through gynmosperm stems was predicted to be very sensitive to variations in [D] and the model explained why [D]; decreases with decreases in water temperature, decreases with increases in nitrogen supply and increases with elevated CO2.
• The model captured some of the important underlying relations linking water transport with wood density and environment and qualitative testing of the model is recommended.