天然林林龄的模拟估算及案例  

A case study on estimating natural forest age with DBH distribution and forest growth model

作　　者：王殿中[1,2] 孙国清 过志峰 

机构地区：[1]遥感科学国家重点实验室,北京100101 [2]中国科学院研究生院,北京100039

出　　处：《生态环境》2008年第5期1999-2003,共5页Ecology and Environmnet

基　　金：国家高技术研究发展(863)计划项目(2006AA12Z114);国家自然科学基金项目(NSFC40571112)

摘　　要：林龄是森林生态系统的一个重要特征,具有生态学意义,但是目前生态学调查中对天然林林龄的估算方法有一定缺陷。在特定的环境条件下,森林有着相应的演替过程。已有林窗研究表明,长白山森林是按照一定次序演替,森林的径级结构也是有规律可循的。由于总是缺乏足够的长期系统观测数据,因此作者采用数值模拟作为替代方法。应用校正过的林窗模型模拟0～600a的森林演替序列,比较对长白山原始天然林的采样的结果,发现目前的林龄最接近400a。这个估测结果可以从本地区历史资料记载得到印证。Forest age is a critical ecological parameter to characterize the status of a forest ecosystem. However, there is deficiency in present methods for estimating natural forest age. In forest gap theory, a forest can be taken as an environment dependent community in certain succession stage. Forest gap model studies have proved that forests in Changbai Mountain follow its own succession sequence. During the succession process, percentage of diameter at breast height （DBH） class changes. Because long term ecological data always lacks, we turn to numerical simulation as an alternative. In this paper, a case of natural forest was measured and its DBH class distribution was calculated, this was further compared to the modeled output of a series of 600-year DBH class distribution. The result showed that the best match age of the old-growth forest was 400 years. And it can be supported by some references.

关 键 词：林龄 林窗模型 径级分布 

分 类 号：Q948[生物学—植物学]