摘要
在RS(遥感)与GIS(地理信息系统)技术支持下,本文以上海市外环以内的城市中心区为研究区域,利用景观生态学方法研究了在不同粒度下城市景观镶嵌结构的空间特征,并结合半变异函数,对不同研究幅度下的城市景观空间格局进行分析研究。结果显示:不同粒度下所得的景观指数有明显差异。就本研究区域而言,在20 m粒度下,具有明显的城市景观特征;不同幅度下的景观指数空间格局总体相似,但较小的研究幅度对于小尺度的格局变化比较敏感,而较大尺度下的空间格局变化更易从较大幅度的图中表现出来;不同的景观指数对尺度变化响应不同;各景观指数受不同过程影响的大小不同,从而使得不同景观指数的空间格局表现不同;从总体上看,该区域范围内N45°E和E0°方向上景观空间变异明显。
On the londuse background of Shanghai city, the structure properties under different grains of regional landscape are studied by using the methods of landscape ecology, and meanwhile, the variogram make it available to analyze the structure properties under different extents. The paper concludes as follows: (1)The landscape indices differ greatly with different grains. According to this research area, the research area takes on the most typical urban landscape properties with the grain of 20m. (2)The special structure of the landscape indices are basically the same with different extents, yet smaller extent are more sensitive to the change of small scale, vice versa. (3)Different landscape indices have different responses to change of grains and extents. In this paper, LSI, SHDI, SHEI are more sensitive to the change of grain, yet CONTAG and PAFRAC is less sensitive. To the change of extents, SHDI and CONTAG are more sensitive, while PAFRAC is less.(4)Different proceeds have different influence on different landscape indices, so that the special structure of different landscape indices differs a lot. (5)Generally, it shows that the patches along the directions of E0啊45癢 varies more.
出处
《生态科学》
CSCD
2004年第2期114-117,123,共5页
Ecological Science
基金
国家自然科学基金项目(40371092)
