上海城市水网景观连接度对生物多样性的影响研究*
Impact of Urban Water Network Connectivity on Biodiversity in Shanghai Metropolitan
丁宇新
上海同济城市规划设计研究院 规划师，硕士
干 靓（通讯作者）
同济大学建筑与城市规划学院 助理研究员，博士
摘要: 城市水网是城市中支持生物多样性的重要生境和生态廊道。以上海各区县作为统计单元，通过水网闭合度（α指数）、线点率（β指数）、网络连接度（γ指数）与生物多样性指标的相关分析，探讨水网景观连接度对生物多样性的影响机制。结果显示，网络回路较多、连通性较好、连线数量较多、水网景观节点之间的连接性也较强的水网系统对鸟类、两栖类、爬行类和鱼类的物种丰富度具有一定的正面效应。因此，在规划中需要考虑水域生境节点间的网络通道效应，提高城市河网水系的连接度，保证生物的迁移活动和能量流的交换。
Abstract: Urban water network provides significant habitats and corridors to support urban biodiversity. This paper aims to explore the impact of urban water network connectivity on biodiversity in Shanghai metropolitan in district units by correlation analysis between network circuitry (αindex), line-node rate (βindex), network connectivity (γindex) and biodiversity indicators. The results show that urban water network with larger circuitry, better connectedness, more connecting lines and higher connectivity between landscape nodes has positive influence on species richness of birds, amphibians, reptiles and fish. Hence, the network connectivity effect between water habitat nodes is with great significance in the planning, so as to increase the urban river network connectivity and to guarantee migration behavior and energy flow exchange of wildlife.
关键词：城市水网景观连接度、生物多样性、上海
Keyword: Urban water network connectivity，Biodiversity，Shanghai
中图分类号：TU981
文献标识码: A
资金资助
国家自然科学基金青年基金项目 “基于生物多样性绩效测评的高密度城镇化地区生态空间格局优化研究” 51408426
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