Spatial-temporal dynamics of ecosystem health in Sichuan Province based on PSR model

doi:10.6046/gtzyyg.2020.02.32

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Abstract

A great many ecological and environmental problems have been caused in the course of rapid economic development and urbanization in Sichuan Province. Evaluating ecosystem health condition is of significant importance for regional sustainable development. Based on relevant city-level data in social, economic, agricultural and ecological aspects from 2000 to 2016 as well as county-level data obtained through the downscaling model, the authors built the pressure-status-response model to make comprehensive evaluation and analysis of ecosystem health of studied regions in Sichuan Province on city-level and county-level scales. The results show that the overall score of ecosystem health in Sichuan increased from 0.610 to 0.687 in 2000—2016, but the spatial distribution shows that the eastern part of Sichuan was better than the western part. The development between studied regions is extremely unbalanced. Chengdu had outstanding advantages in comparison other regions. The results of ecosystem health assessment in each county shows that 27.9% of the total counties are “unhealthy” and “sick”, while about half of the counties are above the “normal” level. The counties whose evaluation results are “sick” are mainly concentrated in Garze and Aba prefectures. The ecological health status in northwest Sichuan deserves much more attention.

Keywords ecosystem health pressure state response Sichuan Province

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Issue Date: 18 June 2020

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	Zhouyang XU

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Zhouyang XU. Spatial-temporal dynamics of ecosystem health in Sichuan Province based on PSR model[J]. Remote Sensing for Land & Resources, 2020, 32(2): 251-258.

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https://www.gtzyyg.com/EN/10.6046/gtzyyg.2020.02.32 OR https://www.gtzyyg.com/EN/Y2020/V32/I2/251

Fig.1 Location of the study area

Tab.1 Ecosystem health assessment indicators

Tab.2 Fitting results between calculated data and original data

Fig.2 Ecosystem health in Sichuan Province from 2000 to 2016

Fig.3 Change of ecosystem primacy and coefficient of variation

Fig.4 City ecosystem health assessment pressure, state and response scores in Sichuan Province

Fig.5 Ecosystem health status of Sichuan municipal level in 2000 and 2016

Fig.6 Standard deviation ellipse and center of gravity distribution of ecosystem health

Fig.7 Scores of pressure, state and response of county-level ecosystem

Fig.8 Ecosystem health status at county level

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