Acta Geographica Sinica ›› 2012, Vol. 67 ›› Issue (12): 1611-1622.doi: 10.11821/xb201212003

Previous Articles     Next Articles

Green Landscape Evolution and Its Diving Factors in Shenzhen

CHANG Qing1, LI Shuangcheng2, WANG Yanglin2, QIU Yao1   

  1. 1. Department of Ornamental Horticulture and Landscape Architecture, China Agricultural University, Beijing 100193, China;
    2. College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
  • Received:2012-05-09 Revised:2012-08-18 Online:2012-12-20 Published:2012-12-20
  • Supported by:

    National Natural Science Foundation of China, No.41001112;No.40635028

Abstract: Green landscape is not only the basis of urban development, but also the carrier of urban ecosystem services. Its dynamic evolution is related to human well-being and urban sustainability. Taking Shenzhen City as a case study, this paper explored the spatial trajectory of green landscape through the urbanization and its evolution mechanism based on TM/ETM + remote sensing data from 1986 to 2005. An improved trajectory analysis of stability mapping, landscape metrics and systematical clustering method were synthetically applied in this study. The results showed that the total area and composition of green landscape in Shenzhen had changed significantly since 1986, and the inflection point occurred around the year of 1995. This indicates that the green landscape change is well consistent with the urbanization process of Shenzhen City. The trajectory of green landscape change involved four process categories, two classes and 13 sub-classes. Quantitatively, the proportion of the transformation process within classes was the highest (30.5%), followed by the stable process (26.97% ), the process of shrinkage & disappearance (22.64%) and the fluctuation process (17.90%), and that of the recovery process is the lowest. So the frequent conversion among green landscape types and the following ecological effects should be a major concern in studies on urban landscape evolution and its effect in the future. Configurationally, the stable forest process and the process of shrinkage and disappearance presented a centralized pattern, two of which formed a conjugate spatial relationship;and the other stable processes and the recovery process presented a relatively centralized or decentralized pattern. After three decades of rapid urbanization, more than 57% of terrestrial areas is covered by green landscape in Shenzhen at present, which is attributed to the topographic conditions and more concrete protection measures such as the basic ecological control line policy, but there are still large amounts of risks for green landscapes. So it is critical to study how to keep sufficient high-quality green landscape for cities in the plains, where the urbanization might extend to a larger extent.

Key words: green landscape, change trajectory analysis, stability mapping, spatial pattern, ecological effects