%0 Journal Article
%T Effects of changing grain size on urban landscape pattern analysis of Shanghai<br>粒度变化对上海市景观格局分析的影响
%A MENG Chen
%A LI Jun-xiang
%A ZHU Ying
%A WU Tong
%A XIAO Zhi-jian
%A ZHANG Guo-ke
%A <br>孟陈
%A 李俊祥
%A 朱颖
%A 吴彤
%A 肖志坚
%A 张国科
%J 生态学杂志
%D 2007
%I 
%X The effects of changing grain size on landscape metrics play an important role in landscape pattern analysis,being one of the important and key issues in landscape ecology.In this paper,the land-use datasets derived from color-infrared aerial photos acquired in 1989 at 1:50 000 scale were employed to analyze the effects of changing grain size on the landscape metrics in central urban,urban-rural ecotone,and suburban landscape types of Shanghai.The results showed that the responses of landscape metrics to changing grain size fell into three categories.The first group of metrics decreased monotonically,the second group increased in staircase or single hump,both of them showing a consistent scaling relation with increasing grain size,while the third group showed uncertainties.There were critical points(i.e.inflexions) in the response curve for most landscape metrics,which corresponded to the suitable scale in landscape pattern analysis.For Shanghai urban landscape pattern analysis,the appropriate spatial resolution was 10-20 m.Different urban landscape types also had effects on the metrics responses to changing grain size,and the metrics in urban-rural ecotone had different variation trends with those in central urban and suburban landscape types.
%K grain size effect
%K scale effect
%K landscape metrics
%K urban landscape pattern
%K scale inflexion<br>粒度效应
%K 尺度效应
%K 景观格局指数
%K 城市景观格局
%K 尺度拐点
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=B04840A985D251F36078BD07A90EF003&aid=772A89169A870552&yid=A732AF04DDA03BB3&vid=96C778EE049EE47D&iid=DF92D298D3FF1E6E&sid=70024E0C77AE588F&eid=4442BFF895478018&journal_id=1000-4890&journal_name=生态学杂志&referenced_num=2&reference_num=26