GEOGRAPHICAL RESEARCH ›› 2017, Vol. 36 ›› Issue (3): 592-602.doi: 10.11821/dlyj201703016

• Articles • Previous Articles    

The dynamic analysis of trade-off and synergy of ecosystem services in the Guanzhong Basin

Mengya HAO1(), Zhiyuan REN1,2(), Yijie SUN1, Shengnan ZHAO1   

  1. 1. College of Tourism and Environment, Shaanxi Normal University, Xi'an 710119, China
    2. Institute for Historical Environment and Socio-economic Development in Northwest China, Xi'an 710062, China
  • Received:2016-10-09 Revised:2017-01-22 Online:2017-03-20 Published:2017-03-22

Abstract:

The Guanzhong Basin is the economic center of Northwest China. In recent years, with the development of the economy, many ecological environment problems have emerged in this region. Therefore, it is important to examine the dynamic changes of trade-off and synergy of ecosystem services in the Guanzhong Basin and explore their influencing factors. In this paper, many models are used to estimate the net primary production (NPP), soil retention and food supply in the basin from 2000 to 2012. And research is conducted on the spatial and temporal change of ecosystem services in different types of land covers by using Rose diagram. Then, we explored the trade-off and synergy among three ecosystem services by correlation diagram made by R software and analyzed its dynamic characteristics in the 13 years. At last, we analyzed the effect of the land cover change on the relationship of trade-off and synergy to explore its driving mechanism. The results indicate that: (1) The annual average NPP per unit area, the annual average value of soil retention per unit area and the annual average value of food supply per unit area were 1720.495 yuan/hm2, 768.889 yuan/hm2 and 167.874 yuan/hm2, respectively. From the perspective of space, the high value regions of NPP and soil retention were distributed over mountains and low value regions were over the central part of the basin. But the food supply presented the opposite pattern. From the perspective of time, three ecosystem services were increased in the 13 years. The annual average NPP per unit area, the annual average value of soil retention per unit area and the annual average value of food supply per unit area increased by 21%, 46.7% and 245.7%, respectively. (2) There were trade-off between NPP and food supply, soil retention and food supply. And there were synergy between NPP and soil retention. (3) On the whole, the trade-off of ecosystem services enhanced and the synergy weakened during the 13 years in the Guanzhong Basin. The degree of synergy between NPP and soil retention decreased. The degree of trade-off between NPP and food supply increased. And the trade-off relationship between soil retention and food supply remained stable during the 13 years. (4) From the perspective of land cover changes, the reduction of cultivated land and forest land is the main driving force of the change of relationship among ecosystem services. At the same time, it is significant to balance conflicts in land resource to use land resource better.

Key words: Guanzhong Basin, NPP, soil retention, food supply, dynamic changes of trade-off and synergy, land use