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The Effect of Blue-Green Infrastructure on Habitat Connectivity and Biodiversity: A Case Study in the Ōtākaro/Avon River Catchment in Christchurch, New Zealand

Author

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  • Thuy Thi Nguyen

    (Department of Civil and Natural Resources Engineering, University of Canterbury, Christchurch 8041, New Zealand)

  • Colin Meurk

    (Manaaki Whenua—Landcare Research, Lincoln 7640, New Zealand
    School of Earth and Environment, University of Canterbury, Christchurch 8041, New Zealand)

  • Rubianca Benavidez

    (BEEA Limited, Wellington 6012, New Zealand)

  • Bethanna Jackson

    (School of Geography, Environment and Earth Sciences, Victoria University of Wellington, Wellington 6012, New Zealand)

  • Markus Pahlow

    (Department of Civil and Natural Resources Engineering, University of Canterbury, Christchurch 8041, New Zealand)

Abstract

The natural capital components in cities (“blue-green infrastructure” BGI) are designed to address long-term sustainability and create multi-benefits for society, culture, business, and ecology. We investigated the added value of BGI through the research question “Can the implementation of blue-green infrastructure lead to an improvement of habitat connectivity and biodiversity in urban environments?” To answer this, the Biological and Environmental Evaluation Tools for Landscape Ecology (BEETLE) within the Land Utilisation and Capability Indicator (LUCI) framework was adopted and applied in Christchurch, New Zealand, for the first time. Three ecologically representative species were selected. The parameterisation was based on ecological theory and expert judgment. By implementation of BGI, the percentages of habitats of interest for kereru and paradise shelduck increased by 3.3% and 2.5%, respectively. This leads to improved habitat connectivity. We suggest several opportunities for regenerating more native patches around the catchment to achieve the recommended minimum 10% target of indigenous cover. However, BGI alone cannot return a full suite of threatened wildlife to the city without predator-fenced breeding sanctuaries and wider pest control across the matrix. The socio-eco-spatial connectivity analysed in this study was formalised in terms of four interacting dimensions.

Suggested Citation

  • Thuy Thi Nguyen & Colin Meurk & Rubianca Benavidez & Bethanna Jackson & Markus Pahlow, 2021. "The Effect of Blue-Green Infrastructure on Habitat Connectivity and Biodiversity: A Case Study in the Ōtākaro/Avon River Catchment in Christchurch, New Zealand," Sustainability, MDPI, vol. 13(12), pages 1-26, June.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:12:p:6732-:d:574679
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    3. Alexandros I. Stefanakis, 2019. "The Role of Constructed Wetlands as Green Infrastructure for Sustainable Urban Water Management," Sustainability, MDPI, vol. 11(24), pages 1-19, December.
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    1. Veerkamp, C.J. & Loreti, M. & Benavidez, R. & Jackson, B & Schipper, A.M., 2023. "Comparing three spatial modeling tools for assessing urban ecosystem services," Ecosystem Services, Elsevier, vol. 59(C).

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