Can policy maintain habitat connectivity under landscape fragmentation? A case study of Shenzhen, China

Luo, Yang; Wu, Jiansheng; Wang, Xiaoyu; Wang, Zhenyu; Zhao, Yuhao

doi:10.1016/j.scitotenv.2020.136829

Cited by 71 publications

(24 citation statements)

References 38 publications

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“…Compared with previous studies that categorized all identified ecological points as key sites [75,76], the present study used the Linkage mapper to obtain a more comprehensive distribution pattern of GI key sites based on the modified resistance surface and classified them in detail. It also determined that we need to take into account the connotations and characteristics of different types of key sites in the governance approach [77].…”

Section: Differentiated Identification and Governance Of Key Sitesmentioning

confidence: 99%

Identifying Key Sites of Green Infrastructure to Support Ecological Restoration in the Urban Agglomeration

Sun

Liu

Wei

2021

Land

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The loss and fragmentation of natural space has placed tremendous pressure on green infrastructure (GI), especially in urban agglomeration areas. It is of great importance to identify key sites of GI, which are used to economically and efficiently restore urban ecological network. However, in the existing research, few scholars have explored the identification and application of GI key sites. Taking the Southern Jiangsu Urban Agglomeration as an example, based on the ecosystem service assessment and landscape connectivity analysis, we identified the multi-class key sites of GI in the study area by MSPA, InVEST model, MCR model, and Linkage mapper. The results showed that: (1) a total of 60 GI sources and 130 GI corridors were extracted. The ecological resources of the study area were densely distributed in the north and south and sparsely in the middle. (2) Three-hundred eighty GI key sites were identified, including 53 water ecological points, 251 ecological fracture points, and 76 ecological pinch points. The GI key sites we identified were large in number and widely distributed, yet were hardly included in the existing ecological protection policies. These key sites should be prioritized in GI planning and differentiated for management strategies, ensuring that limited land resources and public funds can be directed to where restoration is really needed. The present study provides land managers and urban planners with additional tools to better understand how to effectively restore and develop the ecosystems of urban agglomerations in the context of scarce land resources.

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Section: Differentiated Identification and Governance Of Key Sitesmentioning

confidence: 99%

Identifying Key Sites of Green Infrastructure to Support Ecological Restoration in the Urban Agglomeration

Sun

Liu

Wei

2021

Land

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“…It also showed that the protection of ecological corridors should adhere to the principle of integrity, and the government should break the restrictions of administrative regions and implement coordinated protection of ecological corridors. More importantly, we should pay more attention to the intra-corridor heterogeneity [11]. On one hand, we should strengthen the repairment and reduce human interference of potential break points in the circular corridor and Lianhua Mountain corridor, in order to maintain the patency of large-scale ecological corridors; on the other hand, although the stepping stones are small and discontinuous, they can still be connected by overcoming ecological resistance [23,43], which is the only way to maintain ecological connectivity in highly urbanized areas.…”

Section: Protection Effect On Ecological Connectivitymentioning

confidence: 99%

“…Hydrological connectivity was cut off due to an ecological restoration project [9], and the impact could be mitigated by optimizing the landscape configuration [10]. The protection effect of the basic ecological control line policy on ecological connectivity was analyzed by simulating ecological flow [11]. However, the protective effect of EPR on ecological connectivity remains unknown.…”

Section: Introductionmentioning

confidence: 99%

Protection Effect and Vacancy of the Ecological Protection Redline: A Case Study in Guangdong–Hong Kong–Macao Greater Bay Area, China

et al. 2021

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The Ecological Protection Redline (EPR) is an innovative measure implemented in China to maintain the structural stability and functional security of the ecosystem. By prohibiting large-scale urban and industrial construction activities, EPR is regarded as the “lifeline” to ensure national ecological security. It is of great practical significance to scientifically evaluate the protection effect of EPR and identify the protection vacancies. However, current research has focused only on the protection effects of the EPR on ecosystem services (ESs), and the protection effect of the EPR on ecological connectivity remains poorly understood. Based on an evaluation of ES importance, the circuit model, and hotspot analysis, this paper identified the ecological security pattern in Guangdong–Hong Kong–Macao Greater Bay Area (GBA), analyzed the role of EPR in maintaining ES and ecological connectivity, and identified protection gaps. The results were as follows: (1) The ecological sources were mainly distributed in mountainous areas of the GBA. The ecological sources and ecological corridors constitute a circular ecological shelter surrounding the urban agglomeration of the GBA. (2) The EPR effectively protected water conservation, soil conservation, and biodiversity maintenance services, but the protection efficiency of carbon sequestration service and ecological connectivity were low. In particularly, EPR failed to continuously protect regional large-scale ecological corridors and some important stepping stones. (3) The protection gaps of carbon sequestration service and ecological connectivity in the study area reached 1099.80 km2 and 2175.77 km2, respectively, mainly distributed in Qingyuan, Yunfu, and Huizhou. In future EPR adjustments, important areas for carbon sequestration service and ecological connectivity maintenance should be included. This study provides a comprehensive understanding of the protection effects of EPR on ecological structure and function, and it has produced significant insights into improvements of the EPR policy. In addition, this paper proposes that the scope of resistance surface should be extended, which would improve the rationality of the ecological corridor simulation.

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“…Urban vegetation cover is usually affected by socio-economic activities and natural conditions [54][55][56]. Urbanization transforms vegetated land into urbanized area and fragments vegetation cover [40].…”

Section: Urban Greenness Fragmentation Modeling By Svmmentioning

confidence: 99%

“…Previous studies reported that many factors, including urbanization or anthropogenic activities and other natural factors, could be responsible for urban vegetation fragmentation [54][55][56], and models to predict Frag changes and reveal the associated factors of the changes are a helpful step to understand the process of urban greenness fragmentation. The case study suggests that the selected explanatory variables are good for predicting the Frag increase or decrease.…”

Section: Modeling the Associated Factors For The Frag Changesmentioning

confidence: 99%

Assessing Urban Greenness Fragmentation and Analysis of Its Associated Factors: A Case Study in Wuhan Metropolitan Area, China

Fang

Sha

Wang

et al. 2021

IJGI

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Green vegetation plays a vital role in urban ecosystem services. Rapid urbanization often tends to induce urban vegetation cover fragmentation (UVCF) in cities and suburbs. Mapping the changes in the structure (aggregation) and abundance of urban vegetation cover helps to make improved policies for sustainable urban development. In this paper, a new distance-based landscape indicator to UVCF, Frag, was proposed first. Unlike many other landscape indicators, Frag measures UVCF by considering simultaneously both the structure and abundance of vegetation cover at local scales, and thus provides a more comprehensive perspective in understanding the spatial distribution patterns in urban greenness cover. As a case study, the urban greenness fragmentation indicated by Frag was demonstrated in Wuhan metropolitan area (WMA), China in 2015 and 2020. Support vector machine (SVM) was then designed to examine the impact on the Frag changes from the associated factors, including urbanization and terrain characteristics (elevation and slope). The Frag changes were mapped at different scales and modeled by SVM from the selected factors, which reasonably explained the Frag changes. Sensitivity analysis for the SVM model revealed that urbanization showed the most dominant factor for the Frag changes, followed by terrain elevation and slope. We conclude that Frag is an effective scale-dependent indicator to UVCF that can reflect changes in the structure and abundance of urban vegetation cover, and that modeling the impact of the associated factors on UVCF via the Frag indicator can provide essential information for urban planners.

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Can policy maintain habitat connectivity under landscape fragmentation? A case study of Shenzhen, China

Cited by 71 publications

References 38 publications

Identifying Key Sites of Green Infrastructure to Support Ecological Restoration in the Urban Agglomeration

Identifying Key Sites of Green Infrastructure to Support Ecological Restoration in the Urban Agglomeration

Protection Effect and Vacancy of the Ecological Protection Redline: A Case Study in Guangdong–Hong Kong–Macao Greater Bay Area, China

Assessing Urban Greenness Fragmentation and Analysis of Its Associated Factors: A Case Study in Wuhan Metropolitan Area, China

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