摘要
现代流域管理和森林经营管理都要求对流域内以植被为主要类型的景观进行分析,并实现对流域植被未来演替格局的模拟预测。应用LANDIS景观模型对黄土区小流域次生林进行未来500 a的演替格局模拟,结果表明:油松是针叶树中的优势种,辽东栎是阔叶树中的优势种;油松在研究区内分布面积最大的时间保持430 a,辽东栎分布面积最大的时间保持70 a;阔叶树种相对聚集度指数的变化幅度大于针叶树种;随着模拟年代的推衍,树种年龄结构发生显著变化,呈现出复杂多样的异龄林空间分布格局。
For both watershed management and forest management,it is essential to analyze landscape composed mainly of vegetation,simulate the vegetation succession,and predict future landscape pattern.In this paper,LANDIS,a spatially explicit model for forest landscape disturbance,management,and succession,was firstly applied to simulate secondary forest succession for coming 500 years in a small watershed of Loess Plateau.This simulation results shows： Pinus tabulaeformis Carr.is the dominant species among conifers and Quercus wutaishabcia Mayr is the dominant species among broadleaf arbors.During the coming 500 years＇ forest succession simulated with forest landscape LANDIS model,Pinus tabulaeformis Carr.will maintain their dominancy for 430 years and then Quercus wutaishabcia Mayr will usurp the dominion for 70 years.The relative contagion index of broadleaf arbors varied greatly than conifers.The component structure of forest age changes significantly with various spatial pattern of different ages of forest come into being as the year going on.
出处
《中国水土保持科学》
CSCD
2010年第6期80-85,共6页
Science of Soil and Water Conservation
基金
"十一五"国家科技支撑计划课题"困难立地工程造林关键技术研究"(2006BAD03A03)
国家重点基础研究发展规划项目"西部典型区域森林植被对农业生态环境的调控机理"(2002CB111503)
关键词
小流域
景观
植被演替
LANDIS模型
small watershed
landscape
vegetation succession
LANDIS model
