景观要素的形状指数与形状特征的关系  

THE RELATIONS BETWEEN THE SHAPE INDEX OF THE LANDSCAPE ELEMENTS AND THEIR SHAPE FEATURES

作　　者：刘学录[1] 董旺远[2] 林慧龙[2] 

机构地区：[1]甘肃农业大学资源环境系,甘肃兰州730070 [2]甘肃农业大学基础部,甘肃兰州730070

出　　处：《甘肃科学学报》2000年第3期17-20,共4页Journal of Gansu Sciences

基　　金：甘肃省自然科学基金资助项目!( ZS991 -A2 1 -0 3 1 -N)

摘　　要：利用正方形格子网法 ,研究了规则图形、不规则图形的形状指数 ( SD)与其长宽比 ( L/W)和面积周长比 ( A/P)之间的关系。结果表明 ,当平均宽度不变时 ,景观要素的 SD随着 L /W的增加而增加 ;当 L /W不变时 ,SD不随着 A/P的增加而变化 ;是一个常数。这说明景观动态可以分为受不同因素控制的两种类型 :一种为 L/W不变时的动态 ,表现为整体上 A/P的变化 ;另一种为平均宽度不变时的动态 ,表现为 L /W的变化 ,即空间图形狭长程度的变化。The relations of the shape index( SD ) of the exact and real landscape elements and their shape features such as the ratio of Area/Perimeter( A/P ) and of Length/Width( L/W ) are analyzed with rectangular grids. The results show that the SD of the landscape elements increases with the increase of L/W while the average width of the landscape elements keeps constant; SD of the landscape elements keeps invariable as A/P increases when L/W is fixed, it is a constant. It is suggested that the landscape dynamics can be divided into two types controlled by different factors depending on SD :one of them is the dynamics of the average width of the landscape elements keeping constant; the other one is the dynamics of L/W being fixed.

关 键 词：形状指数 景观要素 形状特征 景观生态学 

分 类 号：Q149[生物学—生态学] P901[生物学—普通生物学]