首页 | 本学科首页   官方微博 | 高级检索  
     

乾安县土地利用变化及其生态效应
引用本文:钟林生,张永民,赵士洞,Karl E.Ryavec. 乾安县土地利用变化及其生态效应[J]. 地理学报(英文版), 2003, 13(4)
作者姓名:钟林生  张永民  赵士洞  Karl E.Ryavec
作者单位:Department of
基金项目:National Key Project of Basic Research Development of China,No.G1999043406,National Natural Science Foundation of China,No.30200040
摘    要:Based on GIS and statistical methods, with the help of searching historical literatures andcalculating the landscape indices, the land use changes of Qian'an County in both spatial and temporalaspects from 1945 to 1996 has been analyzed in this paper. And the driving forces of land use changesand their ecological effects are discussed too. The main findings of this study are as follows:(1)Landuse changed greatly in Qian'an during 1945-1996, characterized by a decrease in grassland, wetlandand water bodies,and an increase in cultivated land, saline-alkali land, and the land for housing andother construction purposes. Grassland decreased by 175,828.66 ha, and cultivated land increased by


Land use change and its ecological effect in Qian''an County of Jilin Province
ZHONG Linsheng,ZHANG Yongmin,Zhao Shidong,Karl E.Ryavec. Land use change and its ecological effect in Qian''an County of Jilin Province[J]. Journal of Geographical Sciences, 2003, 13(4)
Authors:ZHONG Linsheng  ZHANG Yongmin  Zhao Shidong  Karl E.Ryavec
Abstract:Based on GIS and statistical methods, with the help of searching historical literatures and calculating the landscape indices, the land use changes of Qian'an County in both spatial and temporal aspects from 1945 to 1996 has been analyzed in this paper. And the driving forces of land use changes and their ecological effects are discussed too. The main findings of this study are as follows: (1) Land use changed greatly in Qian'an during 1945-1996, characterized by a decrease in grassland, wetland and water bodies, and an increase in cultivated land, saline-alkali land, and the land for housing and other construction purposes. Grassland decreased by 175,828.66 ha, and cultivated land increased by 102,137.23 ha over the half century. Accordingly, the main landscape type changed from a steppe landscape to a managed agricultural ecosystem. (2) Results of correlation analysis show that the land use change in the study area was mainly driven by the socioeconomic factors. (3) The ecological effects of land use change in the area are characterized by serious salinization, degression of soil fertility and the weakening of landscape suitability.
Keywords:land use change  ecological effect  land degradation  Qian'an County  
本文献已被 CNKI 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号