摘要
以青海湖流域为研究区域,以遥感影像为主要信息源,以景观指数为空间分析方法,从流域和县域两级水平对青海湖流域1977-2000年湿地景观变化进行空间分析。结果表明:近30年青海湖流域湿地面积净减少101247hm2,斑块数目增加了1099个,破碎程度明显增加,分离度呈上升趋势,分维数逐渐变小趋近于1,人类活动的加剧导致青海湖流域湿地景观空间结构变化。
Qinghai Lake basin was taken as the study area, spatial analyses were conducted of wetland landscape changes from 1977-2000 at county and basin levels using remote sensing data as the main source of information and the landscape index as the tool for spatial analyses. The results showed that： During nearly 30 years, the total area of wetlands in Qinghai Lake basin is declining, with a net reduction of 101 247 hm2, and an increase of 1 099 in the number of wetland spots; fragmentation was significantly intensified, and separation among wetland spots tended to increase; the fractal dimension gradually downward to 1, the influences of human activities towards Qinghai Lake wetland landscape have increased.
出处
《湿地科学与管理》
2009年第4期36-39,共4页
Wetland Science & Management
基金
国家科技支撑项目:生物多样性对气候变化的响应研究(2007BAC03A08-5)
国家自然科学基金项目:青海湖北部湿地生态系统健康评价与生态基准重建(40761010)
国家社会科学青海湖流域生态服务功能与生态补偿标准的定量研究(08XJY012)资助
关键词
湿地景观
时空变化青海湖流域
Wetland landscape, Temporal and Spatial change, Qinghai Lake basin
