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Ecological Corridor Construction Based on Least-Cost Modeling Using Visible Infrared Imaging Radiometer Suite (VIIRS) Nighttime Light Data and Normalized Difference Vegetation Index

Author

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  • Jiameng Hu

    (College of Public Administration, South-Central University for Nationalities, Wuhan 430074, China)

  • Yanfang Liu

    (School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China)

  • Jian Fang

    (College of Urban and Environmental Sciences, Central China Normal University, Wuhan 430079, China)

Abstract

Anthropic pressure is one of the main drivers of landscape change and biodiversity loss. Artificial nighttime light, which can affect species behavior, is an important human-induced threat to biodiversity, but it is often ignored in ecological connectivity research. To mitigate the adverse impacts of artificial lighting on biodiversity, this study integrates artificial nighttime light in landscape ecology and analyzes the influence of artificial nighttime light on landscape connectivity. A quantitative approach integrating nighttime light brightness from a Visible Infrared Imaging Radiometer Suite (VIIRS) with a normalized difference vegetation index (NDVI) from a Moderate-resolution Imaging Spectroradiometer (MODIS) is proposed to estimate the matrix resistance, which can identify the sensitive areas that are disrupted by nighttime light. It was found that the nightscape in the study area is significantly disrupted by nighttime light and the matrix resistance in the center of the study area significantly increases. Compared to the least-cost routes from the NDVI, the “dark” least-cost ecological corridors constructed using our approach apparently change in both location and distance. The corridors moved to the outer suburbs and rural areas, and the maximum increase in distance of the least-cost paths was 37.94%. Due to less disturbance from human activity and the maintenance of a pristine nightscape, “dark” ecological corridors can reduce the adverse effects of night lights and contribute to biodiversity. However, natural habitats have been greatly affected by nighttime light with the increase in global illumination, and it is essential that we improve public awareness of light pollution and formulate light-reduction policies and legislation.

Suggested Citation

  • Jiameng Hu & Yanfang Liu & Jian Fang, 2021. "Ecological Corridor Construction Based on Least-Cost Modeling Using Visible Infrared Imaging Radiometer Suite (VIIRS) Nighttime Light Data and Normalized Difference Vegetation Index," Land, MDPI, vol. 10(8), pages 1-15, July.
    • Handle: RePEc:gam:jlands:v:10:y:2021:i:8:p:782-:d:601397
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    References listed on IDEAS

    as
    1. Li, Hailong & Li, Dihua & Li, Ting & Qiao, Qing & Yang, Jian & Zhang, Hemin, 2010. "Application of least-cost path model to identify a giant panda dispersal corridor network after the Wenchuan earthquake—Case study of Wolong Nature Reserve in China," Ecological Modelling, Elsevier, vol. 221(6), pages 944-952.
    2. Fangning Shi & Shiliang Liu & Yi An & Yongxiu Sun & Shuang Zhao & Yixuan Liu & Mingqi Li, 2020. "Spatio-Temporal Dynamics of Landscape Connectivity and Ecological Network Construction in Long Yangxia Basin at the Upper Yellow River," Land, MDPI, vol. 9(8), pages 1-19, August.
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