期刊
SUSTAINABILITY
卷 13, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/su13020827
关键词
Derong County; ecosystem service value; temporal and spatial variation; land-use and land cover change
资金
- Biodiversity Survey and Assessment Project of the Ministry of Ecology and Environment, China [2019HJ2096001006]
The study highlights the significant changes in LULC in Derong County over the past 30 years, largely driven by agricultural economic development and urban expansion, leading to an overall decrease in ESV. The spatial distribution of ESV shows significant differences in value density across different regions.
Monitoring the spatio-temporal variation of the land-use/land cover change (LULC) and ecosystem service value (ESV) changes will help achieve regional sustainable development and management. Derong County is a part of the Hengduan Mountains area, the most crucial ecological functional area in China, and LULC has changed tremendously in the past 30 years. However, the effects of LULC changes on ecosystem services is not well understood. Based on 1992, 1995, 2005, 2013, and 2018 remote sensing images, we used visual interpretation to obtain LULC data and used global value coefficients and modified local value coefficients to assess the spatial-temporal changes of ESV and LULC from 1992 to 2018. The results showed that: (1) From 1992 to 2018, shrubland and grassland decreased, while built-up land, snow, forestland, water body, and cropland area increased. (2) The ESV with an overall decrease of 0.25 x 10(8) yuan, ecological projects have played a positive role in improving ESV. In contrast, the main decrease factor of ESV was the increase in agricultural economic development and urban expansion from 1992 to 2018. (3) The ESV spatial distribution indicated the value density of ESV was on the decline, and with the greatest deterioration in Dianyagong. The highest density of ESV area is distributed in Waka, and the lowest density of ESV area is distributed in Bari. This research points out the important role of Derong County in the regional life support system and provides a scientific reference for the sustainable management of dry-hot valley regions' land resources and ecosystem services.
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