Diagnosis of the fragmentation of urban ecological network structure and its social-ecological responses.

IF 4.3 2区 环境科学与生态学 Q1 ECOLOGY
Wuyang Hong, Minde Liang, Renzhong Guo, Tao Ma, Yelin Li, Weixi Wang
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Abstract

The fragmentation of ecological network structures has become a common problem faced by cities. By establishing the urban ecological network under a specific socio-ecological system framework, we aimed to propose a quantitative index to diagnose the fragmentation of the network structure, and to construct detection model to explore the driving factors and mechanism of the network fragmentation. Using Shenzhen City as an example, we used the Floyd-Prim algorithm to generate the skeleton structure of the ecological network and construct a density discontinuity index to diagnose network fragmentation. Combined with the ecological network scenario, social-ecological system framework and a two-layer indicator system were constructed. The detection models were then established to explore the drivers of network disruption and their mode of impact. The models show that the average degree of network fragmentation in Shenzhen was 0.13, and the density of about 85% of corridor discontinuities was greater than 0.01, reflecting the serious state of structural fragmentation. Corridors with more severe structural fragmentation have poorer social-ecological coordination. The fragmentation in Shenzhen was mainly affected by the activities of actors (A) at the microlevel and the resource system (RS) at the macrolevel. The methods and the framework of socio-ecosystem analysis proposed in this paper can reveal the driving factors and influence modes of network fragmentation, providing decision-making reference for ecological restoration practice in urbanized areas.

城市生态网络结构破碎化诊断及其社会生态对策。
生态网络结构碎片化已成为城市面临的普遍问题。通过建立特定社会生态系统框架下的城市生态网络,我们旨在提出诊断网络结构破碎化的量化指标,并构建检测模型,探索网络破碎化的驱动因素和机理。以深圳市为例,利用 Floyd-Prim 算法生成生态网络骨架结构,构建密度不连续指数诊断网络破碎化。结合生态网络场景,构建了社会生态系统框架和双层指标体系。然后建立检测模型,探讨网络破坏的驱动因素及其影响模式。模型显示,深圳的网络破碎度平均为 0.13,约 85% 的廊道不连续性密度大于 0.01,反映了严重的结构破碎状态。结构破碎化较为严重的廊道社会生态协调性较差。深圳的破碎化主要受微观层面的行动者(A)和宏观层面的资源系统(RS)活动的影响。本文提出的社会生态系统分析方法和框架可以揭示网络破碎化的驱动因素和影响模式,为城市化地区的生态修复实践提供决策参考。
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来源期刊
Ecological Applications
Ecological Applications 环境科学-环境科学
CiteScore
9.50
自引率
2.00%
发文量
268
审稿时长
6 months
期刊介绍: The pages of Ecological Applications are open to research and discussion papers that integrate ecological science and concepts with their application and implications. Of special interest are papers that develop the basic scientific principles on which environmental decision-making should rest, and those that discuss the application of ecological concepts to environmental problem solving, policy, and management. Papers that deal explicitly with policy matters are welcome. Interdisciplinary approaches are encouraged, as are short communications on emerging environmental challenges.
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