文档介绍：林业科学
SCIENTIA SILVAE SINICAE
1999年第2期 1999
大青沟森林群落演替预测研究
郑元润
摘要:依据38个样地的演替资料,采用母树树冠下各物种幼苗、幼树及小径木的胸高断面积比例作为转移概率,用马尔可夫链描述了群落的演替过程,预测了达到平衡状态时各群落的组成状况,并运用30年前后植物种盖度资料的对比,在较大的时空范围内阐明了大青沟残遗森林植物群落演替的动态过程与趋势。结果表明,在环境条件不发生较大变化的情况下,以水曲柳、蒙古栎为主的群落是较为稳定的群落,而为大果榆为主的群落波动较大。各个不同的群落在达到平衡状态时,其种类组成的数量关系将会发生不同程度的变化。
关键词:森林群落, 演替预测, 大青沟
ISSION PREDICTION OF THE MUNITY
IN DAQINGGOU,INNER MONGOLIA
Zheng Yuanrun
(Institute of Botany, Academia Sinica Beijing 100093)
Abstract: On the basis of survey materials from 38 sample plots, the author regarded the basal area of breast height ratio of saplings and young trees under the mother trees as the transition probobility, predicated not only position of tree species on balance status, but also the dynamic process and trends of survived munity in Daqinggou in longer periods and larger scales through the parison between present and 30 years ago, by means of the Markov ession model. The results show, if the environmental conditions keeping smoothly, munity which Quercus mongolica, Fraxinus mandshurica are main species are more stable, while munity which Ulmus macrocarpa is main species fluctuated greatly. The quantitative correlation of position in munities in balance stutus will be changed variously.
Key words: munity, ession prediction, Daq
inggou
植物群落是一个动态系统。植物群落间的演替是群落动态变化的重要表现形式。探讨植物群落演替的规律,揭示影响演替过程的主要因子,控制演替的进程或方向,使其最大限度地满足人类的需求,在