%0 Journal Article
%T Spatially fuzzy assessment of regional eco-security in Guangzhou, a fast-urbanizing area: a case study in Guangzhou City<br>快速城市化区域生态安全的空间模糊综合评价——以广州市为例
%A GONG Jian-Zhou
%A XIA Bei-Cheng
%A CHEN Jian-Fei
%A <br>龚建周
%A 夏北成
%A 陈健飞
%J 生态学报
%D 2008
%I 
%X The security of ecosystems (eco-security) in urban areas has become a serious problem in fast economic development and urbanization. Regional eco-security and environmental conditions must be improved, first, by understanding eco-security and making assessments of its current status. Based on remote-sensing TM images of Guangzhou and using GIS methods, an index system for eco-security assessment was developed, an assessment was performed with spatially fuzzy sets, and the temporal and spatial dynamics of regional eco-security were analyzed. The index system and gridded pattern of eco-security revealed that the level of eco-security in Guangzhou has been fairly steady with some variation at different times. Before 1995, eco-security was stable but decreased near 1995, when its level was lowest. Comparing different districts, the level in Guangzhou City was lower than that in its suburb districts and in a serious state. The results of assessment for eco-security based on gridding could be shown spatially and visibly, and were useful for spatial comparison to understand different regional eco-security levels. This achievement with the spatially fuzzy set method was an obvious improvement over results obtained by the author with other assessment methods. In eco-security levels, results were the same, but more characteristics for assessment were included in this method, such as the spatial pattern of eco-security. This work shows that using spatially fuzzy sets for regional eco-security assessment is a reasonable and reliable method.
%K 3S<br>区域生态安全
%K 空间模糊评价
%K 3S
%K 变权
%K 广州
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=0BD0036EA415ECBE5D97286381573FC7&yid=67289AFF6305E306&vid=D3E34374A0D77D7F&iid=F3090AE9B60B7ED1&sid=B0C1C74E7BE2A18E&eid=F95F20ECA67F1E89&journal_id=1000-0933&journal_name=生态学报&referenced_num=4&reference_num=26