Greenland is an important part of complex urban ecosystems and provides significant ecosystem services. According to the spot 5 remote sensing data in 2005,the rank, connectivity and space structural measurement of urban green patches in Yangzhou were analyzed under the support of ArcGIS 9.2.In the analysis, some key indexes, e.g., landscape coincidence probability (LCP), integral index of connectivity (IIC), probability of connectivity (PC) and the important value etc., were introduced. The results showed that when the connectivity distance was 500 m, the order of important value reflected by dLCP, dIIC and dPC was almost the same. In the 2 km2 established core region by setting 500 m threshold value, the number and size of green patches accounted for 8 % and 16 % of the total respectively; the core region was mainly composed of medium large patch and large patch. The green patches in this area had high connectivity and low degree of fragmentation. In the future planning and construction, several aspects i.e., controlling land size of green core region, strengthening construction and plant protection in core region and constructing important node of core region in greenland ecological network should be concerned, they are important to enhance the ecological benefits of urban greenland system.
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1]Nowak D J. Atmosphere carbon reduction by urban trees[J]. Journal of Environmental Management,1993, 37: 207-217.
[2]Nowak D J, Crane D E,Crane Daniel E. Carbon storage and sequestration by urban trees in the USA[J]. Environmental Pollution, 2002, 116（3）: 381-389.
[3]Yang J, McBride J, Zhou J X, et al. The urban forest in Beijing and its role in air pollution reduction[J].Urban Forestry & Urban Greening, 2005（3）: 65-78.
[4]Xu H X,Dan S M, He Z W,et al. Remote sensing analysis of urban heat Island effect in Chengdu plain[J]. Environmental Science and Technology, 2007, 30 (8):21-24.
[5]Kong F H, Yin H W, Nakagoshi N. Using GIS and landscape metrics in the hedonic price modeling of the amenity value of urban green space: a case study in Jinan city, China[J]. Landscape and Urban Planning, 2007,79（3）:240-252.
[6]Forman R T T, Godron M. Landscape Ecology [M].New York: John Wiley and Sons, 1986.
[7]Taylor P D, Fahrig L, Henein K, et al. Connectivity is a vital element of landscape structure[J]. Oikos, 1993, 68(3):571-573.
[8]PascualHortal L, Saura S. Comparison and development of new graphbased landscape connectivity indices: towards the priorization of habitat patches and corridors for conservation[J]. Landscape Ecology, 2006,21 (7): 959-967.
[9]Saura S, PascualHortal L. A new habitat availability index to integrate connectivity in landscape conservation planning: comparison with existing indices and application to a case study[J]. Landscape and Urban Planning, 2007,83 (2-3):91-103.
[10]Saura S, PascualHortal L. Conefor Sensinode 2.2 Users Manual: Software for Quantifying the Importance of Habitat Patches for Maintaining Landscape Connectivity Through Graphs and Habitat Availability Indices[M]. Spain: University of Lleida, 2007.
[11]扬州市统计局.城市建设和环境保护[EB/OL].(2010-04-20).http://www.yzstats.gov.cn/dzkw/2010/nj2007/index.htm.
[12]高俊, 杨名静, 陶康华. 上海城市绿地景观格局分析研究[J].中国园林,2000(1):532-256.
[13]周廷刚, 郭达志. 基于GIS的城市绿地景观空间结构研究：以宁波市为例[J]. 生态学报, 2003, 23 (5):901-907.
[14]吴丽娟，周亮.王新杰,等.北京城市绿地系统景观多样性分析[J].北京林业大学学报，2007，29（2）：88-93.
[15]熊春妮, 魏虹, 兰明娟. 重庆市都市区绿地景观的连通性[J].生态学报,2008,28 (5):2237-2244.
PDF(2102888 KB)
