摘要
在RS、GIS技术的支持下,利用MSS及TM影像数据对照地形图提取了通化地区1980、1995以及2 0 0 0年景观生态格局信息,并利用景观多样性、景观优势度、斑块面积变异指数、景观破碎度、斑块形状指数等对该区的整体景观格局和各县(包括县级市)景观格局以及其动态进行了定量分析。结果表明在全区范围内,各种景观类型对应景观指数存在显著差异;通过对各县级行政单位的景观指数计算表明,它们的景观格局存在明显差异;从时间序列上看,无论是整个研究区、还是各县的景观格局在1995年与1980、2 0 0 0年差异较大,而1980与2 0 0 0年景观格局相似。
Landscape pattern mainly refers to the distribution of patches, which are various in size, shape and quality due to the interaction of different ecological activities. Study on landscape pattern can provide valuable information for regional management of all kinds of environmental resources. It has turned out to be one of key study areas of landscape ecology as whole. With the help of RS and GIS technologies, the landscape pattern information of Tonghua region is extracted from Landsat MSS and TM imagery in year 1980, 1995 and 2000 respectively. According to Land-use/cover type, six main land-use categories are included: farmland, forest, grassland, water area, resident and barren area. By using landscape diversity index, dominance, PSCV, fragmentation index, and shape index, the landscape pattern of whole region and that in six counties and their dynamic changes are analyzed quantitatively. And the results show that there is an obvious difference in the pattern of various landscape types in the whole region. Through computation of landscape indices of six counties, conclusion can be drawn that landscape patterns quite different among those counties. From the time series point of view, there is a big difference not only in the landscape pattern of whole region, but also in that of six counties among year 1995 and 1980, 2000; but the landscape pattern in year 1980 and 2000 is quite similar. By comparison those landscape indices, we could summary that the landscape pattern in Tonghua region only altered slightly. But all those conclusions are drawn on the base of information extracted from remotely sensed imagery. For our best knowledge, there are some drawbacks for remote sensing imagery in acquiring quality information of landscapes or environment. So still more advanced technologies should be applied and more field works should be done to acquire information for evaluate the environment quality which could not be drawn from landscape pattern.
出处
《山地学报》
CSCD
北大核心
2005年第2期234-240,共7页
Mountain Research
基金
中科院知识创新工程重大项目 :kzcx1-sw -19 ~~
关键词
通化地区
景观格局
动态变化
景观指数
tonghua region
landscape pattern
dynamic change
landscape index
