Soil disturbance and post-logging forest recovery on bulldozer paths in Sabah, Malaysia

• Published in: Forest ecology and management Vol. 130; no. 1; pp. 213 - 225
• Main Authors: Pinard, M.A, Barker, M.G, Tay, J
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-05-2000; Elsevier
• Subjects: Biological and medical sciences; chronosequences; Dipterocarp forest; disturbed soils; Forest harvesting and working in forest; Forestry; forests; Fundamental and applied biological sciences. Psychology; Harvesting guidelines; logging; Malaysia; plant density; Reduced-impact logging; regrowth; silvicultural systems; Skidding; soil compaction; Soil disturbance; species diversity; topsoil; trails; Tree regeneration; Tropical forest; vegetation; woody plants; Borneo; Sabah; Asia; Malaysia; Harvesting guidelines; Reduced-impact logging; Skidding; Dipterocarp forest; Malaysia; Tropical forest; Soil disturbance; Tree regeneration; Compaction(geol); Mechanical harvesting; Natural forest regeneration; Ecological recovery; Forest soil; Forest logging; Perturbation; Species richness
• ISSN: 0378-1127; 1872-7042
• DOI: 10.1016/S0378-1127(99)00192-9

We examined the extent of soil disturbance associated with bulldozer yarding and the regrowth of woody vegetation on bulldozer paths (skid trails) in selectively logged dipterocarp forest. In an area logged in 1993, using conventional, i.e., uncontrolled, harvesting methods, about 17% of the area was covered by roads and skid trails. In contrast, in a 450-ha experimental area where reduced-impact logging guidelines were implemented, 6% of the area was similarly disturbed. Skid trails in the reduced-impact logging areas were less severely disturbed than those in conventional logging areas; the proportion of skid trails with subsoil disturbance was less than half that in conventional logging areas. Four years after logging, woody plant recovery on skid trails was greater in areas logged by reduced-impact than by conventional methods. Skid trails where topsoil had been bladed off had less woody vegetation than skid trails with intact topsoil. In a chronosequence of logging areas (3, 6, and 18 years after logging), species richness and stem densities of woody plants (>1
m tall, <5
cm dbh) were lower on skid trail tracks than on skid trail edges or in adjacent forest. Both richness and density increased with time since logging, but even 18 years after logging, abandoned skid trails were impoverished in small woody stems compared with adjacent forest. Minimizing soil and stand disturbance during logging appears to allow a more rapid recovery of vegetation on bulldozed soils, but the long-term fate of trees growing on compacted soils remains uncertain.