Study on ecological security assessment of land ecosystem based on PSR model
It has very important meanings to study the ecological security assessment of land ecosystem (ESALE), which could be used as theory support for effectively identifying the land ecological risk (LER) and implementing the effective land restoration strategy. According to the relative researches of land ecosystem degradation, such as emergence, development and influences of land degradation and desertification, ESALE is developed based on the press-stateresponse model (PSR). In which, drive and pressure factors of land degradation and desertification, attributes of land status, series response of land degradation and desertification (negative response, such as natural disaster; positive response, such as land restoration) are identified, which could be used to describe the process of land degradation and desertification and its influence. In addition, for quantitative analyzing the ESALE, series of key process indexes are selected, and based on this, coupling model of EASLE (CM-EASLE) is originally brought forward, which could be used for assessing the land ecological security (LES), and could offer scientific supports for regional land management.
Ecological security assessment of land ecosystem land degradation PSR CM-EASLE
Bo Hu Ping-cang Zhang Xiao-lu Liu Ya-long Ji-gen Liu
Department of Soil and Water Conservation, Changjiang River Scientific Research Institute, Hubei Department of Soil and Water Conservation, Changjiang River Scientific Research Institute, Hubei Wuh
国际会议
西安
英文
1029-1033
2010-10-11（万方平台首次上网日期，不代表论文的发表时间）