Title: Dynamic Evaluation of Ecosystem Health Based on PSR Model in Karst Areas——A Case Study of Guizhou Province
Abstract:Under the background of the ecological reconstruction,the ecological problems become the focus of all walks of life.Owing to the sensitive ecoenvironment of Guizhou Province,the wide rocky desertifica...Under the background of the ecological reconstruction,the ecological problems become the focus of all walks of life.Owing to the sensitive ecoenvironment of Guizhou Province,the wide rocky desertification distribution and serious soil erosion,the necessity of the objective evaluation of ecological system is becoming more and more increasingly prominent.Taking Guizhou Province as the case study,using the index system method of pressure state response(PSR)model and combining GIS and RS technology,we evaluated ecosystem health of Guizhou in the period from 2000 to 2010and analyzed the spatial and temporal variation characteristics.The results showed that:(1)the health level of ecological system in Guizhou Province was basically in theⅢandⅣ grade;(2)ecosystem health had gotten slightly better in the ten years,mainly changed from the levelⅢto the adjacent level,other classes transformed less;(3)at the prefecture-level and city level,the highest average level of ecological health is found in southeast state of Guizhou,the lowest one is found in Bijie City;at the county-level and city level,the ecological condition of Chishui City is the best,and Nanming district is the worst one;(4)the main factors causing the ecosystem health change are population,urbanization,natural factors and industrial ratio.Furthermore,according to the evaluation results,corresponding countermeasures are put forward to protect southeast and strengthen punish northwest,and establish regional grading ecological management system.Read More
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
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Cited By Count: 1
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