森林更新与空间异质性

摘要/Abstract

摘要： 森林更新是一个重要的生态学过程,一直是森林生态系统动态研究中的主要领域之一.森林更新受物理环境、自然干扰、人为干扰、更新树种特性、树种对干扰的反应等因素及其相互作用的影响.这些生物的和非生物的因素随空间和时间而不断变化,构成了森林的空间异质性和时间异质性,使森林更新具有空间和时间上的变化特点,表现在异质性的格局和过程中.探索森林更新与空间异质性的内在规律,可揭示空间格局对更新的生态学过程的潜在作用机制.本文主要综述了近年来有关森林更新与空间异质性研究的主要内容和一些观点,分析了更新中空间异质性的来源,着重评述了空间异质性的生境及更新树种的反应、小尺度的空间异质性与更新动态、林分中光有效性的空间异质性与更新格局以及土壤和更新的空间异质性尺度的关联性等方面的研究.

关键词: 更新, 空间异质性, 森林动态, 地表死可燃物, 气象要素回归, 大兴安岭, 含水率

Abstract: The research on spatial heterogeneity is meaningful for forest regeneration dynamics,which is a critical part in the forest ecosystem dynamics.Traditionally,forestry scientists are mainly concentrated their attention to the studies on the process of regeneration.However forests are spatiotemporal heterogeneous.In regeneration,there exists an ecological dynamic process at temporal scale, but also a heterogeneous pattern at spatial scale.Almost of the factors influencing forest regeneration,including both botic and abotic environment,both natural and human disturbances,and both characteristics of tree species and response of tree species to different disturbance agents,are spatially heterogeneous.Discussion on spatial heterogeneity and its effect on regeneration is indispensable for the understanding of the pattern,process and mechanism of forest regeneration.Main research contents and viewpoints of spatial heterogeneity in forest regeneration were summarised on the basis of available literature,and sources of spatial heterogeneity in the process of regeneration were analysed.The response of species to spatial heterogeneity,small scale spatial heterogeneity and regeneration dynamics,spatial heterogeneity of lights in stand and regeneration pattern,and correlative relationships between the scales of soil heterogeneity and regeneration heterogeneity were reviewed.

Key words: Regeneration, Spatial heterogeneity, Forest dynamics, Great Xing’an Mountains, moisture content, meteorological element regression., surface dead fuel

中图分类号:

S754

韩有志, 王政权. 森林更新与空间异质性[J]. 应用生态学报, 2002, (5): 615-619.

HAN Youzhi, WANG Zhengquan . Spatial heterogeneity and forest regeneration[J]. Chinese Journal of Applied Ecology, 2002, (5): 615-619.

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