Soil disturbance and post-logging forest recovery on bulldozer paths in Sabah, Malaysia
Soil disturbance and post-logging forest recovery on bulldozer paths in Sabah, Malaysia
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DOI：
10.1016/s0378-1127(99)00192-9
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发表时间：
2000-05
影响因子：
3.7
通讯作者：
M. Pinard;M. Barker;J. Tay
中科院分区：
文献类型：
--
作者：
M. Pinard;M. Barker;J. Tay
我们研究了与推土机囤积相关的土壤干扰程度以及在选择性采伐的龙竹林中推土机小路(滑道)上木本植物的再生情况。在1993年采伐的一个地区，使用常规的、即不加控制的收割方法，大约17%的地区被道路和打滑小路覆盖。相比之下，在一个450公顷的试验区，实施了减少影响的采伐指南，6%的区域受到了类似的干扰。与常规伐木区相比，减震伐木区的打滑路径受到的干扰较小；有下层扰动的打滑路径所占比例不到常规伐木区的一半。伐木四年后，在减少影响的伐木地区，木本植物在滑行小径上的恢复比传统方法更好。表层土壤被刮掉的滑雪道的木质植被比表层土壤完好的滑雪道少。在伐木区的时间序列中(伐后3年、6年和18年)，木本植物(1米高、5厘米高)的物种丰富度和树干密度在滑道上低于在滑道边缘或邻近森林中。丰富度和密度都随着采伐时间的延长而增加，但即使在采伐18年后，与邻近的森林相比，小木本树干上的废弃滑道仍然是贫瘠的。在伐木过程中尽量减少土壤和林分的干扰似乎可以更快地恢复推土机土壤上的植被，但在压实土壤上生长的树木的长期命运仍然不确定。
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 (>1m tall, <5cm 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.