The connectivity evaluation of Shanghai urban landscape eco-network
Received date: 2008-09-16
Revised date: 2008-12-25
Online published: 2009-03-25
Supported by
国家自然科学基金资助项目(50878162);国家科技支撑计划(2008BAJ10B02)
The city is the typical artificial landscape system with the characteristics of high fragmentation and low connectivity. Based on the connectivity theory of landscape ecological network, this article discusses the influence, connotation and the characteristics of landscape ecological connectivity and the connection to eco-city construction of China, analyses the typical graphical model of urban landscape ecological network, choosing γ=L/3(V-2),α=L-V+1/2V-5,β=2L/V (in the formula of γ, α and β, L is the number of factual line between knots, V is the number of knots), density of corridor d=L/A and indicator C= L/ξ nA (in formula of indicator d and C, L is the total length of corridor (km), A is area (km2), n is the number of knots, ξ is coefficient) as evaluation indicators and system and tries to evaluate the connectivity of Shanghai urban landscape ecological network in the road network, the green space network, the river system network and the road-river-green space compound network. The characteristics of river network are γ=0.65, α=0.45, β=3.85 and C =1.93. The characteristics of road network are γ=0.7,α=0.54,β=4.16 and C =2.08. The characteristics of green space network are γ=0.49,α=0.34,β=2.88 and C =1.44. The characteristics of road-river-green space compound network are γ=0.44,α=0.16,β=2.63 and C=4.13. Calculation analysis aims at providing a foundation for eco-city development construction and the urban landscape ecological network planning. Results show that, with different connectivity characters individually for each network, all the networks have higher connectivity, but the connectivity degrades sharply to the path-river-green space compound network. The indicators γ,α and β of road network degrade by 37%, 70% and 35% individually, and the indicatorsγ,α and β of river network degrade by 32%, 64% and 138% individually. All this shows fragmentation, isolation and low connection of Shanghai urban landscape eco-network. Finally, the paper gives some suggestions to dealing with the problems of promoting the circle connectivity, increasing the number and scale of network knots, and constructing the eco-bridge between three networks at each knot in order to promote connectivity of the total eco-network.
WANG Yun-cai . The connectivity evaluation of Shanghai urban landscape eco-network[J]. GEOGRAPHICAL RESEARCH, 2009 , 28(2) : 284 -292 . DOI: 10.11821/yj2009020002
[1] Bunn G, Urban D L, Keitt T H. Landscape connectivity: A conservation application of graph theory. Journal of Environmental Management,2000,(59):265~278.
[2] Kringen Henein, Gray Merriam. The elements of connectivity where corridor quality is variable. Landscape Ecology,1990,(4):157~170.
[3] Margot D Cantwell, Richard T T. Forman. Landscape graphs: Ecological modeling with graph theory to detect configurations common to diverse landscapes .Landscape Ecology,1993,(4):239~255.
[4] Schreiber S J, Kelton M. Sink habitats can alter ecological outcomes for competing species. Journal Of Animal Ecology,2005,(6):995~1004.
[5] Janssens X, Bruneau E, Lebrun P. Prediction of the potential honey production at the apiary scale using a Geographical Information System. Apidologie.2006,(3):351~365.
[6] Gulinck H. Neo-rurality and multifunctional landscapes. Multifunctional Landscapes.2004,(14):63~73.
[7] Haber W G. Biological diversity:A concept going astray? Gaia-Ecological Perspectives For Science And Society,2008,(17):91~96.
[8] Gray Merriam. Discovering Natural Processes: Beauty in Nature's Way.Arnstadt: Penumbra Press, 2006.213~235.
[9] Baudry J, Burel F, Aviron S, et al. Temporal variability of connectivity in agricultural landscapes: Do farming activities help? Landscape Ecology,2003,(3):303~314.
[10] 傅伯杰,陈利顶,马克明,等.景观生态学原理及应用. 北京:科学出版社, 2001.81~82.
[11] 张大旭,唐向阳,侯碧清.景观连接度在株洲市城市绿地系统建设中的应用研究.湖南林业科技,2005,(2):42~44.
[12] 陈利顶,傅伯杰. 景观连接度的生态学意义及其意义.生态学杂志,1996,(4):37~42.
[13] 岳天祥,叶庆华.景观连通性模型及其应用.地理学报,2002,(1):67~75.
[14] 岳天祥.生物多样性研究及其问题.生态学报,2001,(3):462~467.
[15] 王成新,姚士谋,王书国.现代化城市的生态枢纽建设实证分析.地理研究,2007,(1):149~156.
[16] 王云才.巩乃斯河流域游憩景观生态评价及持续利用.地理学报,2005,(4) :645~655.
[17] 杨英宝,苏伟忠,江南,等.南京市热岛效应变化时空特征及其土地利用变化的关系.地理研究,2007,(5):877~886.
[18] 车生泉,宋永昌.上海城市公园绿地景观格局分析.上海交通大学学报(农业科学版),2002,(12) :322~327.
[19] 刘滨谊,温全平,刘颂.上海市绿化系统规划分析及优化策略.城市规划学刊,2007,(4):108~112.
[20] 俞孔坚,叶正,李迪华.论城市景观生态过程与格局的连续性—以中山市为例.城市规划,1998,(4) :14~17.
[21] Tischendorf, Lutz,Fahrig,et al. On the usage and measurement of landscape connectivity.Oikos, 2004,(1):7~19.
[22] Brett J, Goodwin, Lenore Fahrig.How does landscape structure influence landscape connectivity. Oikos,2003,(3):552~570.
[23] 徐文君,张凤银.景观生态林建设适宜网络连接度技术研究.防护林科技,2006,(7) :24~51.
[24] 宋治清,王仰麟.城市景观及其格局的生态效应研究进展.地理科学进展,2004,(2):97~106.
[25] 张大旭,唐向阳,侯碧清.景观连接度在株洲市城市绿地系统建设中的应用研究.湖南林业科技,2005,(32) :42~44.
[26] 王云才.论大都市郊区游憩景观规划与景观生态保护.地理研究,2003,(2) :324~330.
[27] 王海珍,张利权. 基于GIS、景观格局和网络分析法的厦门本岛生态网络规划.植物生态学报,2005,(29) :144~152.
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