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作 者 ：谷会岩;金靖博;陈祥伟;王恩姮;周一杨;柴亚凡

期 刊 ：应用生态学报 2009年 20卷 02期 页码：265-270

关键词：落叶松；

摘 要 ：比较了兴安落叶松天然林和两种不同干扰类型兴安落叶松林(一次干扰林、二次干扰林)之间活立木蓄积、粗木质残体(CWD)蓄积和组成的差异.结果表明：天然林、一次干扰林和二次干扰林的活立木蓄积量分别为161.6、138.3和114.8 m³·hm^-2，粗木质残体的蓄积量分别为69.77、36.64和32.61 m³·hm^-2.天然林粗木质残体大部分径级在20～40 cm，其中倒木、枯立木分别占总材积的72%和28%；一次干扰林和二次干扰林粗木质残体大部分径级在10～30 cm，其中倒木、枯立木和伐桩分别占各自总材积的70%、14%、16%和57%、15%、28%.人为干扰造成兴安落叶松林粗木质残体蓄积减少，改变了粗木质残体的组成.

Abstract:An investigation was conducted on the living tree volume, coarse woody
debris (CWD) loading, and composition of Larix gmelinii forest along a human
disturbance gradient, i.e., no disturbance (natural larch forest), one-time d
isturbance (natural forest was disturbed once only), and two-time disturbance
(natural forest was disturbed two times consecutively), on the northern slope
of Greater Hinggan Mountains. The results showed that under no disturbance, one
-time disturbance, and two-time disturbance, the average living tree volume of
L. gmelinii forest was 1616, 1383, and 1148 m3·hm-2, and the
average CWD loading was 6977, 3664 and 3261 m3·hm-2, respectively
. In natural L. gmelinii forest, most of CWD was of 20〖KG-*2〗-〖KG-*7〗40 c
m diameter class, among which, fallen logs occupied 72%, and snags and stumps oc
cupied 28%; while in one-time and two-time disturbance L. gmelinii forests,
most CWD was of 10〖KG-*2〗-〖KG-*7〗30 cm diameter class, with the fallen logs
, snags, and stumps occupied 70%, 14% and 16%, and 57%, 15% and 28%, respectivel
y. Human disturbance reduced the CWD loading of L. gmelinii forest and altere
d the composition of the CWD.

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