佛山市禅城区景观格局粒度效应分析Ⅱ——粒度效应分析

Analysis of spatial grain effects on landscape pattern in Chancheng district of Foshan city——Analysis on grain effect

以佛山市禅城区作为研究对象,在其土地利用分类的基础上,利用GIS软件、景观格局分析软件(Fragrats3.3)和Excel软件,从景观水平和斑块类型水平上分析了粒度变化对禅城区、老城区和南庄镇3类景观格局的影响,并对比分析南庄镇和老城区在不同粒度下的尺度效应,寻找不同景观的适宜分析粒度,从而为选择适宜粒度进行景观指数的计算和尺度转换提供理论依据。结果表明,景观指数具有粒度效应:在景观水平上,禅城区的适宜粒度为5、20～40和120～140m,老城区的适宜粒度为10、20～40和120～140m,南庄镇的适宜粒度为5、70、110m;在斑块类型水平上,禅城区和老城区的适宜粒度均为10或120～140m,南庄镇的适宜粒度大致为10、20或120～150m。

Taking Changcheng district of Foshan city as the object and the classification and use of the land in Changcheng district as the basis of our research,we use GIS software,landscape pattern software（Fragrats3.3） and Excel as tools to analyze the effect of the changes in spatial grain and the effect of grain size on landscape pattern between the old urban area and Nanzhuang district from the perspectives of the landscape-and the class-level so as to provide some theoretical reference for the landscape indices calculation with suitable grain size and size shifting.We found that the indices of landscape pattern change significantly with the increase of grain size.To make it exact,for the landscape-level in Changchen district,the appropriate spatial resolution is 5,20～40 and 120～140 m;in the old urban area,10,20～40 and 120～140 m;and Nanzhuang district,5,70 and 110 m while for the class-level in Changchen district and the old urban areathe appropriate spatial resolution is 10 or 120～140 m and in Nanzhuang district,10,20 or 120～150 m.