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Advances in Nano Research Volume 12, Number 3, March 2022 , pages 319-336 DOI: https://doi.org/10.12989/anr.2022.12.3.319 |
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Spatiotemporal evolution and influencing factors of ecosystem service value in the Sanjiangyuan nature reserve |
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Hao Liu, Chang Shu and Lihui Sun
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| Abstract | ||
| Evaluating the temporal and spatial changes in the ecosystem service value (ESV) of the Sanjiangyuan Nature Reserve is important for understanding the impact of human activities on natural ecosystem and guiding ecosystem restoration and environmental pollution control. In this study, remotely sensed land-cover data and the equivalent factor method were used to analyze the spatiotemporal evolution characteristics of the ESV in Sanjiangyuan Nature Reserve from 1992 to 2015, and regression analysis was employed to determine the factors driving changes in the ESV. The results show that grassland was the main type of ecosystem in the study area, and the transformation of grassland into bare areas was the primary change in land cover. Additionally, the ESV in the study area first decreased and then increased, with an annual growth rate of 0.69%. The ESV mainly increased in the north of the Yellow River's source area, and mainly decreased in the northwest of the Yangtze River's source area. Finally, the gross output value of agriculture, urbanization rate and proportion of secondary industry were found to be the main factors driving the ESV in the study area. | ||
| Key Words | ||
| driving force; ecosystem service value; environmental pollution; hotspot analysis; Sanjiangyuan nature reserve | ||
| Address | ||
| Hao Liu, Chang Shu and Lihui Sun: Chinese Research Academy of Environmental Sciences, Beijing 100012, China | ||