Acta Geographica Sinica ›› 2016, Vol. 71 ›› Issue (7): 1215-1230.doi: 10.11821/dlxb201607010

• Ecology and Environment • Previous Articles     Next Articles

Positive and negative ecosystem services evaluation and its spatial pattern analysis on urban landscape: A case study of Xi'an City

Mengtao LI(), Zhongxue ZHOU()   

  1. College of Tourism and Environment, Shaanxi Normal University, Xi'an 710119, China
  • Received:2015-10-11 Revised:2016-02-03 Online:2016-07-25 Published:2016-07-27
  • Supported by:
    National Natural Science Foundation of China, No.41271550;Humanities and Social Sciences Project of Ministry of Education in the West and the Frontier Areas, No.12XJC790003

Abstract:

Comprehensive assessment of the positive ecosystem services and disservices provided by urban landscape and evaluation of its contribution of different urban landscapes to total value of ecosystem services, are crucial to optimizing and regulating the urban landscape configuration and the eco-environment construction in rapid urbanization. Based on the knowledge of landscape ecology and ecosystem service and the Landsat images (OLI-TIRS) data, we valued the ecosystem services of urban landscape including its disservices and analyzed their spatial pattern of Xi'an urbanized area by building the models and employing software of ERDAS, ArcGIS10.1 in 2013. The results showed that: (1) The disservice value of urban landscape is remarkably higher than the positive ecological service value, and the net value is approximately -12.71×108 yuan in Xi'an city. In the process of rapid urbanization, the positive service value of urban landscape dramatically decreased and the negative service took up a large proportion of total values resulting from the transformation from natural landscape to semi-artificial landscape and artificial landscape, 87.81% of the urbanized area provided for negative net value of ecosystem services, and only 12.19% of the area provided positive net services. The expansion of urban landscape dominated by large built-up area will inevitably lead to the decline in ecosystem service value. (2) The value of positive ecosystem services provided by urban landscape in Xi'an city varied from urban core area to urban fringe obviously, which is lower in central area than in fringe area; And the high value area close to the road and in the parks shows the mixed patterns with plaque and grid. The total value of negative ecosystem services in the inner area is higher than that in the urban fringe, and high value area is more concentrated in space. Natural landscape and semi-artificial landscape are the main providers of the positive ecosystem services in city. (3) The spatial distribution of the urban landscape fundamentally determines the spatial pattern of the comprehensive ecosystem services, and the mosaic of different urban landscape types reflects the spatial pattern of the positive and negative ecosystem services shaped by the patches and the chessboard structure. The nearer to the area of urban fringe, the higher the comprehensive ecosystem services value is. There are the high value areas where the forest, grassland and water were distributed or scattered in the park or along road side in the city.

Key words: urban landscape, comprehensive ecosystem service, positive and negative ecosystem services, Xi'an City