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- W2372933375 abstract "The cumulative effects of human activities on regional ecological security have attracted much attention in recent years.Land use/cover change plays a decisive role to regional ecological security.In this research,we chose Ordos which is located in northern agro-grazing eco-tone as the study area.Basing on GIS and SPSS software platform,we constructed indicators system of ecological security assessment,calculated the threshold and constructed model of ecological security assessment in 1988,2000 and 2008.From the studies above,the following conclusions can be drawn: 1)The ecological security situation of the study area got worse at first,but then improved in the year of 2000,which was directly related to the policies of returning farmland to forest(grass) and fencing and delaying grazing.This phenomenon indicates that economic activities such as land use and the enacting of policies affect regional ecological security level significantly.In addition,policies are playing a more and more important role in not only the development of agriculture and livestock,but also guiding the overall ecology.2) Grassland with high coverage rate got the highest level of ecological security among all land-use types,and grassland with middle coverage rate got the second.Ecological security of forestland was very steady.Water and low coverage grassland were often at a critical stage,and could be easily affected by precipitation,saline soil,as well as desertification.In contrast,farmland,built-up land and unutilized land were at the lowest ecological security level.3) Otog Banner was at the level of better security.Otog Front Banner and Jungar Banner were at the level of critical stage of security.Dalad Banner and Dongsheng District were at the lowest ecological security level.During the past 20 years,the ecological security has been getting better in Dongsheng District and Ejin Horo Banner,it first decreased and then increased in Otog Front,Otog,Hanggin,Uxin and Jungar banners to different degrees.The results could be beneficial for providing references to regional ecological management for the local government." @default.
- W2372933375 created "2016-06-24" @default.
- W2372933375 creator A5001517670 @default.
- W2372933375 date "2011-01-01" @default.
- W2372933375 modified "2023-09-22" @default.
- W2372933375 title "Regional Ecological Security Assessment Based on Land-Use Change——A Case Study in Ordos City" @default.
- W2372933375 hasPublicationYear "2011" @default.
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