盐化草地景观中的斑块形状指数及其生态学意义  

Shape index and its ecological significance in salinized meadow landscape

作　　者：刘学录[1] 

机构地区：[1]甘肃农业大学资源与环境系,甘肃兰州730070

出　　处：《草业科学》2000年第2期50-52,共3页Pratacultural Science

基　　金：甘肃省自然科学基金资助项目! (项目编号 :ZS991- A2 1- 0 31- N)

摘　　要：利用 GIS技术研究了盐化草地景观中的斑块形状指数及其生态学意义。研究结果表明 ,斑块形状指数在描述斑块和斑块的空间格局方面 ,与斑块的分维数一样具有明确的生态学意义 ,可以作为反映一定尺度上斑块和景观复杂程度的定量指标。斑块形状指数越小 ,斑块的形状越规则、简单 ;斑块形状指数越大 ,斑块的形状越复杂 ;斑块形状指数的变化范围比分维数要大 ,可以大于分维数的上限The shape index and its ecological significance were studied with GIS in salinized meadow of Linze County. The result showed that the less shape index, the more regular and simpler shape of patch. The range of shape index could be more than 2 that was the upper limit of fractal dimension. The shape index had analogous ecological significance with the fractal dimension while describing the patch and the spatial pattern of landscape and thereby it could be used as a quantitative index to indicate the patch and complexity of landscape structure depending on scale.

关 键 词：盐化草地景观 斑块形状指数 分维数 景观生态学 

分 类 号：S812[农业科学—草业科学] P901[农业科学—畜牧学]