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Construction and Optimization Strategy of County Ecological Infrastructure Network Based on MCR and Gravity Model—A Case Study of Langzhong County in Sichuan Province

Feng, Mao, Zhao, Wanmin, Zhang, Tao·2023·Sustainability
DOI 10.3390/su15118478
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Abstract

Against the backdrop of rapid urbanization, there is a passive adaptation state shown in urban and rural ecological spaces. Due to the shrinking of ecological patches and the fracture of corridors, problems such as the obstruction of ecological processes, the decline of ecosystem services, and the loss of biodiversity occur. Considering that county ecological space is the key level to undertake provincial ecological security patterns and implement ecological demonstration projects, the construction of a county ecological infrastructure (EI) network is beneficial to the protection of regional ecological security, the improvement of the structures and functions of farmland ecosystems, and the enhancement of the quality of human settlements. In this study, taking Langzhong County in Sichuan Province as an example, a method path for an EI network construction was explored, and an optimization strategy for ecological patterns was proposed. Firstly, morphological spatial pattern analysis (MSPA) and a patch importance index were employed to identify ecological sources. Secondly, by constructing a landscape resistance surface and adopting a minimum cumulative resistance (MCR) model, potential EI corridor paths were extracted. Thirdly, the interaction force values between ecological sources were calculated with a gravity model and important ecological corridors were identified for priority protection and restoration. Finally, an EI corridor network was optimized by combining network structure indexes (α, β, and γ) with the field situation, and stepping stone patches and ecological breakpoints were identified. Based on the analysis results, an ecological protection pattern, which involved three vertical and two horizontal ecological belts, four ecological control zones, and six clusters of EI networks in Langzhong County, was put forward, aiming at protecting 50 ecological sources, repairing 105 ecological corridors of different grades, adding 9 stepping stone patches near long-distance corridors and 15 at the intersection of ecological corridors, and repairing 18 ecological breakpoints. This study has guiding significance for the optimization of county ecological patterns, the construction of farmland forest belts, and site selection of ecological restoration projects.

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  • Existing research has primarily focused on the categorization of ecological corridors while ignoring the classification of heritage corridors.

    “Thirdly, the existing research has primarily focused on the categorization of ecological corridors [30][31][32] while ignoring the classification of heritage corridors.”

    From Circuit theory-based cultural heritage corridor network development in qin river basin (2025) · cites this paper as [31]

  • Existing studies often use the Minimum Cumulative Resistance (MCR) model for corridor generation, but this method has limitations in addressing network closure design and multi-path optimization.

    “Secondly, existing studies often use the Minimum Cumulative Resistance (MCR) model for corridor generation 25,31 , but this method has limitations in addressing network closure design and multi-path optimization 42,47 .”

    From Circuit theory-based cultural heritage corridor network development in qin river basin (2025) · cites this paper as [31]

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Metadata

Authors
Feng, M., Zhao, W., & Zhang, T.
Venue
Sustainability
Publisher
MDPI AG
Published
2023-05-23
Volume
15
Issue
11
Pages
8478
ISSN
2071-1050
DOI
10.3390/su15118478
Cited by
25
References
0
Language
en
Licence
creativecommons.org/licenses/by/4.0/ (vor)
Funders
National Nature Science Foundation of China (NSFC) (51678086)

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