Publications des agents du Cirad

Cirad

The imprint of logging on tropical forest carbon stocks: A Bornean casestudy

Rozak A.H., Rutishauser E., Raulund-Rasmussen K., Sist P.. 2018. Forest Ecology and Management, 417 : p. 154-166.

In tropical forests, selective logging generates a significant reduction of above-ground carbon stocks, due to direct removal of a few large merchantable individuals, and the death of smaller injured or smashed trees following harvesting. Several studies have shown a strong correlation between logging intensity and a reduction of biodiversity, wood production, and biomass stocks. However, little is known about the long-term effects of logging on the main forest carbon (C) stocks in above and below-ground tree biomass, deadwood, litter, and soil. In this study we quantified C stocks in 28 0.25-ha plots located in a mixed Dipterocarp forest, Borneo, Indonesia, logged 16?years ago at different intensities ranging from 0 to 57% of initial biomass removed. We investigated the effect of logging intensity, topography, and soil variables on each C stock using linear mixed models. Sixteen years after logging, total C stocks ranged from 218 to 554?Mg C ha?1 with an average of 314?±?21?Mg C ha?1, of which more than 75% were found in live trees. Logging intensity was found to be the main factor explaining the variability in carbon stored in above- and below- ground biomass of tree DBH >20?cm and deadwood. Simultaneously, the proportion of deadwood increased with logging intensity reaching 13.5% of total C stocks in intensively logged plots (>20% removal of initial biomass). This study confirmed, therefore, the need to limit logging intensity to a threshold of 20% of initial biomass removal in order to limit the long-term accumulation of deadwood after logging, probably due to high post-logging mortality. With more than half of all Bornean forests already logged, accounting for total C post-logging is key to better assess the long-term carbon footprint of commercial logging in the region, and is a necessary step towards the development of C-oriented forest management in the tropics.

Mots-clés : séquestration du carbone; abattage d'arbres; forêt tropicale; forêt; asie du sud-est; bornéo; kalimantan; exploitation forestière

Thématique : Foresterie - Considérations générales; Chimie et physique du sol

Documents associés

Article de revue

Agents Cirad, auteurs de cette publication :