Arid Zone Research ›› 2019, Vol. 36 ›› Issue (2): 474-485.

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Spatiotemporal Differentiation of Ecosystem Services in the Shiyang River Basin from 2005 to 2015

WANG Bei1, ZHAO Jun2, ZHONG Jun-tao3   

  1. 1.  College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730070, Gansu, China; 2.  College of Geography and Environmental Sciences, Northwest Normal University, Lanzhou 730070, Gansu, China; 3.  College of Geographic Sciences, Qinghai Normal University, Xining 810016, Qinghai, China

  • Received:2018-03-30 Revised:2018-12-06 Online:2019-03-15 Published:2019-03-12

Abstract:

The study on ecosystem services has become as a hot topic and frontier in the field of ecology. The Shiyang River Basin was taken as the research object to estimate the ecosystem services including the water conservation, soil retention, water purification, biodiversity sustaining, carbon storage and food supply based on GIS technology and methods in 2005, 2010 and 2015. Moreover, the evolution of the spatiotemporal pattern of ecosystem services, change of ecosystem services based on land use types and compartment of ecosystem functions were explored and studied. The results firstly showed that:  these ecosystem services presented the spatially differential characteristics, the spatial pattern of water conservation, biodiversity maintenance and carbon storage presented the characteristics that the lowvalue zones were located in the northeast, and the highvalue zones were mostly distributed in the southwest. In addition, the distribution of highvalue zones of water purification was fragmentary. And the highvalue zones of food supply were located in Wuwei, Yongchang and Minqin basins; Among the different land use types, grassland and cultivated land played the main role of providing ecosystem services; The basin was divided into three ecological functional areas, namely Qilian ecological conservation area, watershed oasis ecological function area and desert ecological function area. The study and analysis of the spatiotemporal differentiation of ecosystem services in the Shiyang River Basin provided the support of data and methods for relevant research, and also the scientific references for determining the goal of watershed ecological protection and construction.

Key words: InVEST model, land use type, ecosystem service function, ecological function zone, Shiyang River Basin