Present address: UFZ Centre for Environmental Research Leipzig-Halle, Department of Ecological Modelling, Permoserstr. 15, D-04318 Leipzig, Germany.
Sustainable timber harvesting in Venezuela: a modelling approach
Article first published online: 21 DEC 2001
Journal of Applied Ecology
Volume 38, Issue 4, pages 756–770, August 2001
How to Cite
Kammesheidt, L., Köhler, P. and Huth, A. (2001), Sustainable timber harvesting in Venezuela: a modelling approach. Journal of Applied Ecology, 38: 756–770. doi: 10.1046/j.1365-2664.2001.00629.x
- Issue published online: 21 DEC 2001
- Article first published online: 21 DEC 2001
- logging scenarios;
- plant functional types;
- tropical forest
- 1Reliable data on the growth and yield of logged-over forest, to determine sustainable cutting cycles, are widely missing for the tropics.
- 2We used the process-based model formind2.0 to analyse the growth and yield of logged-over forest in Venezuela under different logging scenarios over a period of 240 years, and compared results with unlogged stands. The performance of the model was evaluated with a detailed stability and sensitivity analysis.
- 3In the absence of further logging, the logged-over stand approached the stand structure of mature forest in terms of bole volume and basal area after about 50–100 years.
- 4Thirty-year cutting cycles with conventional logging methods and net extraction volumes of 45 and 60 m3 ha−1 cycle−1 did not provide sustainable yields under either of two minimum felling diameters (35 and 50 cm) that were applied. Only the 60-year cutting cycle provided sustainable yields under conventional and reduced-impact logging, with the different minimum felling diameters and a range of net volumes extracted (30–60 m3 ha−1 cycle−1).
- 5With the longest cutting cycle (60 years), bole volume recovered to levels similar to the mature unlogged stand, but the species composition was very different.
- 6Scenarios with reduced-impact logging provided a significantly higher timber volume than under conventional logging. The conservation of forest resources will only be possible with long cutting cycles (at least 60 years) in combination with reduced-impact logging.