崇明岛沿岸防护林结构与功能空间异质性分析  

Spatial Heterogeneity of Structure and Function of the Coastal Shelterbelts in Chongming Island

作　　者：孔正红[1] 董卉卉[1] 陈希[2] 王开运[1,2] 李宏庆[1] 

机构地区：[1]上海市城市化生态过程与生态恢复重点实验室华东师范大学生命科学学院,上海200062 [2]华东师范大学资源与环境科学学院,上海200062

出　　处：《林业科学》2009年第4期60-64,共5页Scientia Silvae Sinicae

基　　金：国家自然科学基金面上项目(30600079);国家科技部"十一五"科技支撑重大项目(2006BAC01A14);上海市科委中法联合资助项目(063907040)

摘　　要：对崇明岛2005年1∶50000航片进行解译,将GIS的空间分析法与景观格局分析法相结合,并对防护林带群落结构进行抽样调查,通过计算完备度、景观格局指数以及疏透度值3项指标,从不同层次上对岛区沿岸防护林结构与功能的空间异质性进行综合分析。结果显示:崇明岛沿岸基干防护林带完备度仅为21%,空间格局分异明显,西岸、南岸林带完备度高于北岸与东岸。景观指数分析结果表明:已有林带分布不连续,多呈片段状分布,其中西岸、东岸的连续性高于南岸与北岸。群落结构与功能调查发现,受树种及群落配置的影响,很少样地林带疏透度值达到最适,目前林带防风效果并不理想。文中最后从数量、结构以及空间分布3方面对岛区未来沿岸防护林体系的构建提出建议,并从研究方法与内容两方面提出了未来岛区沿岸防护林的研究方向。A 1：50 000 scale aerial image of Chongming Island in 2005 was interpreted. GIS spatial analysis integrated with landscape pattern method were used to investigate community composition and structure of the coastal sheherbelts intending to comprehensively understand the structure and function heterogeneity with the calculation of completeness, pattern metrics and porosities. The result showed that completeness of the coastal sheherbeh in the Island was only 21% with obvious spatial heterogeneity. The completeness of the west and south coast was higher than those of the north and east part. Landscape metrics analysis disclosed that current shelterbelts were ineonsecutive with small dispersedly distributing patches. The west and east coast had better continuity than the south and north part. Community structure and function investigation revealed that porosities of only a few plots can attain the optimum value, and wind breaking effect of the existing shelterbehs were poor. This paper proposed suggestions concerning quantity, structure and spatial distribution of future coastal sheherbehs construction, and also put forward the orientation of further research method and content in regard to coastal sheherbehs.

关 键 词：崇明岛 防护林 结构与功能 空间异质性 

分 类 号：S727.2[农业科学—林木遗传育种]