eCite Digital Repository

The estimation of carbon budgets of frequently burnt tree stands in savannas of northern Australia, using allometric analysis and isotopic discrimination

Citation

Cook, GD and Liedloff, AC and Eager, RW and Chen, X and Williams, RJ and O'Grady, AP and Hutley, LB, The estimation of carbon budgets of frequently burnt tree stands in savannas of northern Australia, using allometric analysis and isotopic discrimination, Australian Journal of Botany, 53, (7) pp. 621-630. ISSN 0067-1924 (2005) [Refereed Article]

DOI: doi:10.1071/BT04150

Abstract

The stock, rates of sequestration and allocation of carbon were estimated for trees in 14 0.1-ha plots at Kapalga in Kakadu National Park, Northern Territory, using new allometric relationships of carbon stock to stem cross-sectional area and measured growth rates of trees. Carbon stocks of trees ranged from 12 to 58 t ha-1, with sequestration representing ∼9% of the total stocks. More than half of the sequestered carbon is allocated to leaves and twigs and ∼20% to wood. Only ∼25% is retained in the live trees with leaf and twig fall accounting for 80-84% of the total transfers to the environment. An alternative method of calculating sequestration rates from consideration of water use and carbon-isotope discrimination data had a close to 1:1 match with estimates from allometric relationships. We developed and applied algorithms to predict the impacts of fire on carbon stocks of live trees. This showed that the reduction in live carbon stocks caused by single fires increased with increasing intensity, but the impact was highly dependent on the tree stand structure. © CSIRO 2005.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Native Forests
Author:O'Grady, AP (Dr Anthony O'Grady)
ID Code:38108
Year Published:2005
Web of Science® Times Cited:45
Deposited By:Plant Science
Deposited On:2005-08-01
Last Modified:2006-05-19
Downloads:0

Repository Staff Only: item control page