Research on logging: reduced-impact logging in Indonesian Borneo: some results confirming the need for new silvicultural prescriptions
Reduced-impact logging (RIL) and conventional techniques (CNV) were compared in a mixed dipterocarp hill forest in Malinau, East Kalimantan. Damage was evaluated using pre- and post-harvesting assessments in 24 one-hectare sample plots. RIL techniques nearly halved the number of trees destroyed (36...
| Autores principales: | , , , |
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| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
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CIFOR and ITTO
2002
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/18652 |
| _version_ | 1855532733774692352 |
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| author | Sist, P. Sheil, Douglas Kartawinata, K. Priyadi, H. |
| author_browse | Kartawinata, K. Priyadi, H. Sheil, Douglas Sist, P. |
| author_facet | Sist, P. Sheil, Douglas Kartawinata, K. Priyadi, H. |
| author_sort | Sist, P. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Reduced-impact logging (RIL) and conventional techniques (CNV) were compared in a mixed dipterocarp hill forest in Malinau, East Kalimantan. Damage was evaluated using pre- and post-harvesting assessments in 24 one-hectare sample plots. RIL techniques nearly halved the number of trees destroyed (36 vs. 60 trees/ha). RIL's main benefit was in the reduction of skidding damage (9.5% of the original tree population in RIL vs. 25% in CNV). Before logging, mean canopy openness in CNV (three plots only) and RIL (9 plots) was similar (3.6 and 3.1%) and not significantly different. After logging, the mean canopy openness was significantly higher in CNV with 19.2% than in RIL 13.3%. At a larger scale, the area of skidtrail per unit timber volume extracted was halved in the RIL compartment (15 m2 vs. 27 m2 m-3 for CNV). However, under high felling intensities (>8 trees/ha), both stand damage and canopy disturbance in RIL approached those recorded in CNV. Over this eight tree-felling threshold the effectiveness of RIL in reducing tree damage is limited. In mixed dipterocarp forest where harvestable timber density generally exceeds 10 trees/ha, a minimum diameter-felling limit is insufficient to keep extraction rates below 8 trees/ha. Based on these new results and previous studies in Borneo, we suggest three new rules: (1) to keep a minimum distance between stumps of ca. 40 m, (2) to ensure only single tree gaps using directional felling, (3) to harvest only stems with 60-100 cm dbh. Foresters, policy makers and certifiers should consider these as criteria for sustainable forest management. |
| format | Book Chapter |
| id | CGSpace18652 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2002 |
| publishDateRange | 2002 |
| publishDateSort | 2002 |
| publisher | CIFOR and ITTO |
| publisherStr | CIFOR and ITTO |
| record_format | dspace |
| spelling | CGSpace186522025-01-24T14:20:05Z Research on logging: reduced-impact logging in Indonesian Borneo: some results confirming the need for new silvicultural prescriptions Sist, P. Sheil, Douglas Kartawinata, K. Priyadi, H. selective felling dipterocarpaceae logging damage silvicultural systems assessment Reduced-impact logging (RIL) and conventional techniques (CNV) were compared in a mixed dipterocarp hill forest in Malinau, East Kalimantan. Damage was evaluated using pre- and post-harvesting assessments in 24 one-hectare sample plots. RIL techniques nearly halved the number of trees destroyed (36 vs. 60 trees/ha). RIL's main benefit was in the reduction of skidding damage (9.5% of the original tree population in RIL vs. 25% in CNV). Before logging, mean canopy openness in CNV (three plots only) and RIL (9 plots) was similar (3.6 and 3.1%) and not significantly different. After logging, the mean canopy openness was significantly higher in CNV with 19.2% than in RIL 13.3%. At a larger scale, the area of skidtrail per unit timber volume extracted was halved in the RIL compartment (15 m2 vs. 27 m2 m-3 for CNV). However, under high felling intensities (>8 trees/ha), both stand damage and canopy disturbance in RIL approached those recorded in CNV. Over this eight tree-felling threshold the effectiveness of RIL in reducing tree damage is limited. In mixed dipterocarp forest where harvestable timber density generally exceeds 10 trees/ha, a minimum diameter-felling limit is insufficient to keep extraction rates below 8 trees/ha. Based on these new results and previous studies in Borneo, we suggest three new rules: (1) to keep a minimum distance between stumps of ca. 40 m, (2) to ensure only single tree gaps using directional felling, (3) to harvest only stems with 60-100 cm dbh. Foresters, policy makers and certifiers should consider these as criteria for sustainable forest management. 2002 2012-06-04T09:08:39Z 2012-06-04T09:08:39Z Book Chapter https://hdl.handle.net/10568/18652 en CIFOR and ITTO Sist, P., Sheil, D., Kartawinata, K., Priyadi, H. 2002. Research on logging: reduced-impact logging in Indonesian Borneo: some results confirming the need for new silvicultural prescriptions . In: CIFOR. ITTO project PD 12/97 Rev.1 (F): forest, science and sustainability: the Bulungan model forest: technical report phase 1, 1997-2001. :26-38. Bogor, Indonesia, CIFOR and ITTO. |
| spellingShingle | selective felling dipterocarpaceae logging damage silvicultural systems assessment Sist, P. Sheil, Douglas Kartawinata, K. Priyadi, H. Research on logging: reduced-impact logging in Indonesian Borneo: some results confirming the need for new silvicultural prescriptions |
| title | Research on logging: reduced-impact logging in Indonesian Borneo: some results confirming the need for new silvicultural prescriptions |
| title_full | Research on logging: reduced-impact logging in Indonesian Borneo: some results confirming the need for new silvicultural prescriptions |
| title_fullStr | Research on logging: reduced-impact logging in Indonesian Borneo: some results confirming the need for new silvicultural prescriptions |
| title_full_unstemmed | Research on logging: reduced-impact logging in Indonesian Borneo: some results confirming the need for new silvicultural prescriptions |
| title_short | Research on logging: reduced-impact logging in Indonesian Borneo: some results confirming the need for new silvicultural prescriptions |
| title_sort | research on logging reduced impact logging in indonesian borneo some results confirming the need for new silvicultural prescriptions |
| topic | selective felling dipterocarpaceae logging damage silvicultural systems assessment |
| url | https://hdl.handle.net/10568/18652 |
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