崇明岛绿色河流廊道景观格局  

LANDSCAPE PATTERNS OF GREEN STREAM CORRIDORS IN CHONGMING ISLAND

作　　者：罗坤[1] 蔡永立[1] 郭纪光[1] 左俊杰[1] 

机构地区：[1]华东师范大学资源与环境学院,上海市城市化生态过程与生态恢复重点实验室,上海200062

出　　处：《长江流域资源与环境》2009年第10期908-913,共6页Resources and Environment in the Yangtze Basin

基　　金：上海市科委"登山行动计划"崇明生态岛建设重大项目(06dzl2303)

摘　　要：绿色河流廊道作为一种重要的生态基础设施,在改善生态环境质量,维持生物多样性,提高景观多样性等方面发挥着关键作用。以崇明岛为例,探讨绿色河流廊道景观格局定量研究的方法,针对绿色河流廊道景观格局存在的问题,提出相应的绿色河流廊道建设建议。利用GIS处理河流廊道基础数据,以景观生态学原理为基础,以景观格局指数为依据,从崇明岛绿色河流廊道景观构成和廊道网络结构两方面详细分析崇明岛内各行政区域的不同绿色河流廊道的景观格局。结果表明:绿色河流廊道总长为952.26 km,廊道建设率基本在80%以上;绿色河流廊道普遍较窄,平均宽度仅为9.96 m,不利于生物多样性的保护;崇明岛绿色河流廊道比较缺乏,总密度仅0.75 km/km2;各行政区域相比,城镇区域绿色河流廊道建设率高,绿色廊道质量高;农场区域的绿色河流廊道建设不及城镇区域,但绿色廊道较城镇区域要宽。崇明岛河流廊道网络结构简单,网络线点率,连通性偏低,网络中缺乏回路,严重影响滨水生态系统的发展。As an important ecological infrastructure, the green stream corridors play a significant role in improving ecological environment, maintaining biological diversity and enhancing landscape diversity. Taking Chongming Island for example,this paper shows the method of quantitative study for the landscape patterns of the green stream corridors, and also puts forward some corresponding suggestions for the existing problems of the landscape patterns of green stream corridors. Based on landscape ecology theories and landscape pattern indices, using GIS technology to process the basic data of stream corridors, the landscape patterns of each green stream corridor in each administrative district of Chongming Island were analyzed in two aspects, which are the landscape composition of the green stream corridors and the structure of the corridor network. The results indicate that：The total length of the green stream corridor is 952.26 km and the construction ratio of it achieves above 80%. The green stream corridors mostly are narrow and the average width is only 9.96 m,which causes negative effect on protecting biological diversity. The green stream corridors are scarce in Chongming Island and their overall density is 0.75 km/km^2. Among all districts, the green stream corridors in the town have much higher construction ratio and better quality than those in the farms. But the green stream corridors which in the farm areas are much wider than those in the town. The network of the green stream corridors in Chongming Island is very simple while the ratio of line to node and connectivity are small. And the green network is lack of loop which has seriously influence on the development of waterfront ecosystem.

关 键 词：绿色河流廊道 崇明岛 廊道结构 网络结构 

分 类 号：X171.4[环境科学与工程—环境科学] TV213.5[水利工程—水文学及水资源]