[1]HE Xiang,YAO Yao.Analysis of Ecological Risk Based on Supply and Demand of Ecosystem Services in Karst Mountains[J].Research of Soil and Water Conservation,2020,27(05):202-212,220.
Copy
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 05
Page number:
202-212,220
Column:
目次
Public date:
2020-08-20
- Title:
-
Analysis of Ecological Risk Based on Supply and Demand of Ecosystem Services in Karst Mountains
- Author(s):
-
HE Xiang1, YAO Yao2
-
(1.College of Management Science and Engineering, Guizhou University of Finance and Economics, Guiyang 550025, China; 2.College of Public Management, Guizhou University of Finance and Economics, Guiyang 550025, China)
-
- Keywords:
-
ecosystem services; supply and demand; ecological risk; Guizhou Province; Karst mountainous area
- CLC:
-
X826
- DOI:
-
-
- Abstract:
-
In this paper, by constructing the evaluation index of ecosystem service supply and demand, using the method of ecological risk index model, we analyzed the structural characteristics and spatial differentiation of ecosystem service supply and demand in Guizhou Province, and discussed the degree of ecosystem risk. The results showed that:(1)from 2010 to 2015, the area of construction land increased significantly, the total value of ecosystem supply increased by 21.45%, and the annual average growth rate was 3.96%; the total supply of water resources services was negative due to the steep terrain, high area rate of cultivated land in mountainous areas and the dual hydrological characteristics of surface and underground space in Guizhou Province, resulting in weak water storage and conservation, and serious shortage of water resources supply in agricultural production; the value of support and regulation services accounted for about 85% of the total value, indicating that its ecosystem had an important ecological barrier function for the middle and lower reaches of the Yangtze River and the Pearl River;(2)the average annual growth rate of demand for ecosystem services was 10.15%; in 2015, the total demand for ecosystem services was 61.46%; the supply of ecosystem services was surplus, but the growth rate of demand was much higher than that of supply;(3)Guiyang City and Anshun City belonged to the pattern of low supply and high demand, Bijie City, Qiannan Prefecture, Qiandongnan Prefecture and Zunyi City belonged to the pattern of high supply and low demand, Liupanshui City, Southwest Guizhou Prefecture and Tongren City belonged to the pattern of low supply and low demand;(4)there were serious deficits in the supply and demand of food, raw materials and water resources services in the ecosystems of all cities, and the risk of ecosystems was high; the ecological risk index of aesthetics, food and raw material supply services increased by 419.42%, 50.24% and 11.87%, respectively, and the ecological risk was aggravated; there was no ecological risk in support and regulation ecosystem services, and the pressure of ecological risk was low; there was no ecological risk in support and regulation services, and the pressure of ecological risk was low, which was the result of long-term ecological control and restoration of rocky desertification. These research results can reveal that the growth rate of demand for ecosystem services in Guizhou Province is greater than that of supply. There are serious structural and ecological risk differentiation and spatial imbalance between supply and demand of ecosystem services, and serious ecological risk in ecosystem.