基于遥感和GIS方法的千岛湖库区集合植物群落宏观格局初步分析  

Analysis on the macro-pattern of meta-plant-community in Thousand Island Lake area using RS-GIS methods

作　　者：王春叶[1] 李德志[2,3,1] 孙玉冰[1] 李立科[1] 赵鲁青[1] 潘宇[1] 吕媛媛[1] 赵美霞[1] 高锦瑾[1] 

机构地区：[1]华东师范大学环境科学系,上海200062 [2]华东师范大学上海市城市化生态过程与生态恢复重点实验室,上海200062 [3]浙江天童森林生态系统国家野外科学观测研究站,浙江宁波315114

出　　处：《华东师范大学学报（自然科学版）》2011年第2期89-98,共10页Journal of East China Normal University(Natural Science)

基　　金：国家‘十一五’科技支撑重大项目课题(2006BAC01A14);上海市科委"登山行动计划"崇明生态建设重大项目(06DZ2303);国家自然科学基金(30370245;30470288);上海市生态学重点学科项目;华东师范大学211工程项目

摘　　要：以杭州市淳安县千岛湖库区的典型集合植物群落为研究对象,运用遥感和GIS方法对其宏观格局特征进行初步分析,探讨了不同面积岛屿的归一化植被指数及其不同等级岛屿斑块的景观格局.结果表明:岛屿大小与岛屿的归一化植被指数呈现明显的正相关关系.各类岛屿内部不同NDVI等级斑块的景观格局对其NDVI整体大小有一定影响.整个景观的破碎化程度都很高.岛屿面积越大,各等级NDVI斑块的密度越小,破碎化程度越小,相同等级NDVI斑块间的连通性越强,景观类型也越多样,各斑块类型在景观中分布越均匀.这种植被格局有利于物种个体或繁殖体的迁移与定居,以及不同等级的局部植物群落(斑块)间的功能联系和群落结构稳定性的维持,因而NDVI整体水平也相对较高.千岛湖研究区NDVI等级斑块的景观指数计算结果较好地反映了其上分布的集合植物群落的宏观格局.该结果深化了对该区域景观水平格局的了解,并初步验证了遥感和GIS方法在分析集合植物群落的宏观格局时具有一定的适应性和可行性.The macro-pattern of a typical meta-plant-community in the area of Thousand Island Lake,Chun＇an country,Hangzhou,was studied using the methods of remote sensing and GIS. The values of NDVI of islands with different sizes,and the landscape pattern of island patches with different grades of NDVI were studied.The results revealed the significant positive correlation between the sizes of islands and their NDVI values.The landscape pattern of patches with various NDVI grades within the different types of islands influenced on its overall level of NDVI values to some extent.The entire landscape suffered from high degree of fragmentation.The results showed that the larger the island area is,the smaller the density of patches with various NDVI grades is,the smaller the degree of fragmentation is,the stronger the cohesion of patches with same NDVI grade is,the more diverse the landscape types is,and the evener the distribution of patches of each type in the landscape is.Such vegetation pattern is conducive to the migration and colonizaticm of individuals or propagules of species,as well as the functional linkage between local plant communities with different NDVI grades,and the maintenance of stability of community structures,resulting the relatively high overall level of NDVI.The results of the landscape indexes of the patches with various NDVI grades reflected the macro-pattern of the meta-plant-communities in the area of Thousand Island Lake,and deepened our understanding of the landscape pattern of the area,which preliminarily tested the adaptability and feasibility of the methods of remote sensing and GIS in studying the macro-pattern of meta-plant-communities in general.

关 键 词：集合群落 NDVI 景观格局 遥感影像 GIS 千岛湖 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]