欢迎访问《生态学杂志》官方网站,今天是 分享到:

生态学杂志 ›› 2003, Vol. ›› Issue (5): 56-61.

• 博士论坛 • 上一篇    下一篇

森林景观格局分析及破碎化评价——以祁连山西水自然保护区为例

杨国靖1, 肖笃宁1,2   

  1. 1. 中国科学院寒区旱区环境与工程研究所, 兰州, 730000;
    2. 中国科学院沈阳应用生态研究所, 沈阳, 110016
  • 收稿日期:2003-01-24 修回日期:2003-05-18 出版日期:2003-05-10
  • 基金资助:
    国家自然科学基金重大资助项目(90102004)

Forest landscape pattern and fragmentation:a case study on Xishui Natural Reserve in Qilian mountain

YANG Guojing1, XIAO Duning1,2   

  1. 1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2003-01-24 Revised:2003-05-18 Online:2003-05-10

摘要: 基于西水自然保护站2001年1:5万林相图,在地理信息系统软件ArcGIS和景观结构分析软件Fragstats(栅格版)支持下,从景观总体特征、斑块面积、斑块周长、斑块数和分形维数等角度对其景观格局和破碎化程度进行了分析和评价.结果表明,各景观组分中草地面积最大,保持得较为完整;杨类、白桦软阔类、针阔混交林、疏林地、农田和未成林地面积小,呈零散分布;青海云杉林的面积和周长较大,但其边界密度大,显示出较高的破碎化程度.各景观组分的分形维数均较低,远离于2,更趋向于1,表明各景观类型的边界褶皱程度均较低,整个景观的边界形状较为简单.

关键词: 净初级生产力, 氮矿化速率, 氮积累量

Abstract: Based on the forest distribution map(data from the year of 2001 and scale 1∶50000), using the geography information system program ArcGIS and the landscape analysis program FRAGSTATS, we analyzed the spatial pattern and evaluated the degree of fragmentation primarily from the overall landscape properties, the area properties, the perimeter properties, the numbers of patches of landscape elements and the double-logged fractal dimension(DLFD)of Xishui Natural Reserve. The results showed that grassland was the most important landscape type with the biggest area in this region. The mixed forest of poplar and birch, the mixed forest of conifer and broadleaf, the sparse forest, the Farmland and the unforested-land were all distributed fragmentarily in the landscape. The forest of spruce had a large area and perimeter, but its verge density was much larger than grassland and shrub, which indicatesd a high degree of fragmentation. As a whole, the DLFD of landscape elements in this region was low, ranging from 1 and 2, but inclined to 1. Therefore the edges of the landscape were relatively smooth.

Key words: Net primary production (NPP), Soil nitrogen mineralization rate, Plant nitrogen retention

中图分类号: