Logging damage and the subsequent dynamics of a dipterocarp forest in East Kalimantan (1990–1996)
Logging damage and the subsequent dynamics of a dipterocarp forest in East Kalimantan (1990–1996)
复制标题
东加里曼丹龙脑香科森林的采伐损害及其后续动态（1990-1996）
DOI：
10.1016/s0378-1127(01)00649-1
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发表时间：
2002
影响因子：
3.7
通讯作者：
N. Nguyen
中科院分区：
文献类型：
--
作者：
P. Sist;N. Nguyen
在印度尼西亚东加里曼丹省的一个低地龙脑香林中，研究了采伐对森林动态过程的影响。1990 ~ 1991年，在12个4 hm 2样地（200 m ×200 m）中，每样地分为4个1hm 2的子样地，对胸径≥ 10 cm的林木进行了至少属级的测定和鉴定。从1991年11月至1992年3月，在9个地块进行了采伐，而3个地块作为对照。根据采伐后剩余断面积的比例，将48个子区分组如下：第1组原始断面积剩余80%以上，第2组70- 79%，第3组小于70%，第4组作为对照区。1992年伐木后立即进行了重新测量，然后每两年进行一次，直到1996年。采伐强度从1到17 stemsha −1（50- 250 m3 ha −1）不等。在原始森林中，平均年死亡率保持不变，每年1.5%，在整个研究期间，而平均年死亡率显着较高的登录森林（每年2.6%）。这一较高的比率是由于受伤树木的死亡率较高（每年4.9%）。伐木后四年，在伐木和原始森林的死亡率相似。在原始林中，补充量保持在每年8株/ha-1，而在采伐过的林分中，每年的补充量从14株/ha-1到32株/ha-1不等，与损失量成比例。在剩余断面积最低的林分中，先锋种的强烈更新强烈地限制了龙脑香树的建立和生长。这项研究表明，在原始森林中伐木（砍伐的树木和在砍伐和集材过程中死亡的树木）所减少的总断面积不应超过原始断面积的15%;采用最大采伐强度为8 treesha −1的减少影响伐木（RIL）技术，可以将伐木损害保持在这个阈值以下。
The effects of logging damage on forest dynamics processes were assessed in a lowland dipterocarp forest of East Kalimantan, Indonesia. From 1990 to 1991, twelve 4ha plots (200 m ×200 m) each divided into four 1ha subplots were set up and all trees with dbh ≥10cm measured and identified at least at the generic level. Logging was carried out from November 1991 to March 1992 in nine plots while three plots served as control. The 48 subplots were grouped according to the proportion of remaining basal area after harvesting, as follows: group 1 with more than 80% of the original basal area remaining, group 2 with 70–79%, group 3 with less than 70%, and group 4 as control plots. Remeasurements were carried out just after logging in 1992 and then every 2 years until 1996. Felling intensity varied from 1 to 17stemsha−1(50–250m3ha−1). In primary forest, mean annual mortality remained constant to 1.5% per year throughout the study period while mean annual mortality rate was significantly higher in logged-over forest (2.6% per year). This higher rate resulted from a higher mortality of injured trees (4.9% per year). Four years after logging, mortality rates in logged-over and primary forest were similar. Recruitment remained constant at 8treesha−1per year in primary forest and varied from 14 to 32treesha−1per year in logged-over stand in proportion with the amount of damage. In stands with the lowest remaining basal area, the establishment and growth of dipterocarps was strongly limited by the strong regeneration of pioneer species. This study suggests that total basal area removed by logging in primary forest (harvested trees and trees killed during felling and skidding) should not exceed 15% of the original one; reduced-impact logging (RIL) techniques applied with a maximum harvesting intensity of 8treesha−1, can keep logging damage under this threshold.