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ISPRS Int. J. Geo-Inf. 2015, 4(4), 2045-2060; doi:10.3390/ijgi4042045

Ecological Network Construction Based on Minimum Cumulative Resistance for the City of Nanjing, China

School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
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Academic Editors: Suzana Dragicevic and Wolfgang Kainz
Received: 19 July 2015 / Revised: 10 September 2015 / Accepted: 7 October 2015 / Published: 13 October 2015
(This article belongs to the Special Issue Bridging the Gap between Geospatial Theory and Technology)
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Abstract

With economic growth and the improvement of the urbanization level, human activities have constantly interfered with landscape patterns, resulting in serious threats to regional ecological security. Therefore, it is of great significance to study the evolution and optimization of the landscape patterns. Based on three TM images from 1990, 2000, and 2010, and selected landscape pattern indexes, the changes in the landscape pattern of Nanjing in the past twenty years were studied based on landscape ecology theory using Remote Sensing (RS) and a Geographical Information System (GIS). The ecological network was built on the basis of extracted ecological nodes and the minimum cumulative resistance. The results show that changes in the landscape pattern of the city of Nanjing were notable. Class-level indexes indicate that the farmland landscape area decreased and the degree of patch fragmentation increased. The construction land area increased, and it tended to show dispersed distribution. The proportion of forest land increased and the shape of patches became more complex. The proportion of water firstly showed a decrease, followed by an increase, and the shape of the water became more regular. Landscape-level indexes indicate that biological diversity and the degree of fragmentation increased. Spatial heterogeneity of the natural landscape increased, and the patch shape of each landscape type developed similarly. The results also call for stepping-stones to enhance the connectivity and optimization of the ecological network, which will help improve ecological services and improve the landscape pattern of the city. View Full-Text
Keywords: landscape pattern; land use change; ecological network; minimum cumulative resistance; Nanjing landscape pattern; land use change; ecological network; minimum cumulative resistance; Nanjing
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Dong, J.; Dai, W.; Shao, G.; Xu, J. Ecological Network Construction Based on Minimum Cumulative Resistance for the City of Nanjing, China. ISPRS Int. J. Geo-Inf. 2015, 4, 2045-2060.

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