Journal of Geographical Sciences ›› 2015, Vol. 25 ›› Issue (5): 603-616.doi: 10.1007/s11442-015-1190-y

• Orginal Article • Previous Articles     Next Articles

The effects of land consolidation on the ecological connectivity based on ecosystem service value: A case study of Da’an land consolidation project in Jilin province

Jun WANG1(), Shenchun YAN1,2, Yiqiang GUO1, Junran LI3, Guoqing SUN2   

  1. 1. Key Laboratory of Land Consolidation and Rehabilitation, Ministry of Land and Resources, Beijing 100035, China
    2. School of Land Science and Technology, China University of Geosciences, Beijing 100083, China
    3. Department of Geosciences, The University of Tulsa, Tulsa, OK 74104, USA
  • Received:2013-10-22 Accepted:2014-06-30 Online:2015-05-15 Published:2015-05-15
  • About author:

    Author: Wang Jun, PhD and Research Fellow, specialized in landscape ecology, land change science and land consolidation. E-mail:junwangjun@tom.com

  • Supported by:
    National Natural Science Foundation of China, No.41171152

Abstract:

Land consolidation has a profound impact on landscape patterns and ecological functions at various scales through engineering and biological measures. In recent years, China invests more than 100 billion RMB yuan on land consolidation each year. To understand how land consolidation affects landscape patterns and ecosystems, we investigated the ecosystem service value and the ecological connectivity in a consolidated area of Da’an city from 2008 to 2014 using a revised ecological connectivity index. The results indicated that land consolidation has certain negative influences on the ecosystem services in this area. The total ecosystem service value will decrease by nearly 30% in the late stage of consolidation. This decrease is caused by the loss of ecosystem service of the wetland and grassland, despite a sensible increase of cultivated land. In addition, land consolidation could change the ecological connectivity as well as the land use structure. Up to 85% of the entire area will be in low connectivity in the late stage of consolidation, representing a 6.23% increase in the total coverage compared to pre-consolidation. Finally, the different connectivity landscape and their key areas can be identified by the revised ecological connectivity index effectively. This study is helpful to trace out the relationships between landscape pattern and ecological process, and provides insights for ecological planning and designing of land consolidation in this area. We suggest that more attentions should be paid to improve the quality and ecosystem service value per unit area of the landscape, to establish ecological compensation mechanism of wetland losses, and to create the ecological corridors along the least accumulated impendence surface in the key areas during land consolidation.

Key words: land consolidation project, ecological connectivity, ecosystem service value, landscape pattern, landscape function, Da’an city