摘要
以景观生态学理论为基础 ,采用遥感 (RS)和地理信息系统 (GIS)相结合的方法 ,探讨了三江平原沼泽湿地的动态变化特征。结果表明 ,三江平原沼泽湿地主要分布在富锦、同江和抚远三个县 (市 ) ,其总面积占全区总面积的 5 1.42 % ;1980～ 2 0 0 0年间三江平原沼泽湿地的分布面积显著下降 ,1980～ 1996年间沼泽湿地面积减少了5 1.33% ,1996年之后减少速度明显下降。同时沼泽湿地景观的破碎化显著 ,斑块数量增加了 46 % ,斑块密度净增加两倍。 1980年、1996年、2 0 0 0年景观的分维值分别 1.312 1、1.383 9、1.36 3 1,表明三江平原沼泽湿地受人为因素的影响较大。除宝清县、汤原县和同江市沼泽湿地面积变化较之全区变化不显著外 ,其它地区均发生较为显著的变化。
Based on landscape ecology, remote sensing and Geographical Information System technologies, the dynamic change of mire in Sanjiang Plain is analyzed. The results show that mire is mainly distributed in the counties of Fujin, Tongjiang and Fuyuan, whose area accounts for 51.42% of the total area of mire in Sanjiang Plain. The area of mire decreased greatly from 1980 to 2000, especially from 1980 to 1996, it decreased to 51.33%. Since 1996 the decrease speed of mire′s area has become slow. The results also indicate that the fragmentation of mire landscape was evident in the last two decades in Sanjiang Plain. The number of patch has increased 46%, and the density of patch has increased two times. The fractal dimension of mire landscape in 1980,1996 and 2000 respectively is 1.3121,1.3839 and 1.3631. This means that the shape of mire landscape greatly transforms. The area change of mire in other counties except the counties of Baoqing, Tangyuan, and Tongjiang is greater than the whole region.
出处
《地理科学》
CSCD
北大核心
2002年第5期636-640,共5页
Scientia Geographica Sinica
基金
中国科学院知识创新工程项目 (KZCX2- 30 8- 3- 5 )。
