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Landscape planning and defragmentation measures: an assessment of costs and critical issues

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  • De Montis, Andrea
  • Ledda, Antonio
  • Ortega, Emilio
  • Martín, Belén
  • Serra, Vittorio

Abstract

Defragmentation, i.e. the systematic action of reconnecting even smaller and more isolated landscape patches, is a major concern for landscape analysists and planners. Landscape fragmentation (LF) can jeopardize both ecosystem continuity and quality. Transport and mobility infrastructures (TMIs) are considered one of the main causes of LF and trigger negative effects, such as death of wild animals killed by vehicular traffic, and decrease of landscape connectivity. The effectiveness of defragmentation actions can be monitored through indices, such as the Infrastructural Fragmentation Index (IFI) and, as a counterpart, the connectivity index (CI). In this paper, we aim at illustrating the effect of defragmentation actions based on the use of wildlife crossing structures (WCSs). WCSs are targeted for the wild boar and ideally located at different linear densities in the fragmented and car accidents very rich landscape unit of Alghero, Sardinia, Italy. Results demonstrate that the higher the WCSs’ density the higher the defragmentation effect and that the average cost of defragmentation increases for scenarios with denser WCSs.

Suggested Citation

  • De Montis, Andrea & Ledda, Antonio & Ortega, Emilio & Martín, Belén & Serra, Vittorio, 2018. "Landscape planning and defragmentation measures: an assessment of costs and critical issues," Land Use Policy, Elsevier, vol. 72(C), pages 313-324.
    • Handle: RePEc:eee:lauspo:v:72:y:2018:i:c:p:313-324
    DOI: 10.1016/j.landusepol.2017.12.068
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    References listed on IDEAS

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    1. Emilio Ortega & Bel�n Mart�n & Encarnaci�n Gonzalez & Eduardo Moreno, 2016. "A contribution for the evaluation of the territorial impact of transport infrastructures in the early stages of the EIA: application to the Huelva (Spain)-Faro (Portugal) rail link," Journal of Environmental Planning and Management, Taylor & Francis Journals, vol. 59(2), pages 302-319, February.
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    Cited by:

    1. Lucia Saganeiti & Antonella Favale & Angela Pilogallo & Francesco Scorza & Beniamino Murgante, 2018. "Assessing Urban Fragmentation at Regional Scale Using Sprinkling Indexes," Sustainability, MDPI, vol. 10(9), pages 1-23, September.
    2. Ledda, Antonio & De Montis, Andrea, 2019. "Infrastructural landscape fragmentation versus occlusion: A sensitivity analysis," Land Use Policy, Elsevier, vol. 83(C), pages 523-531.
    3. Rovelli, Roberto & Senes, Giulio & Fumagalli, Natalia & Sacco, Jessica & De Montis, Andrea, 2020. "From railways to greenways: a complex index for supporting policymaking and planning. A case study in Piedmont (Italy)," Land Use Policy, Elsevier, vol. 99(C).
    4. Martín, Belén & Ortega, Emilio & de Isidro, Ágata & Iglesias-Merchan, Carlos, 2021. "Improvements in high-speed rail network environmental evaluation and planning: An assessment of accessibility gains and landscape connectivity costs in Spain," Land Use Policy, Elsevier, vol. 103(C).
    5. Antonio Ledda & Vittorio Serra & Andrea De Montis, 2019. "The Effect of Rural Buildings on Landscape Fragmentation in Natura 2000 Sites: A Case Study in Sardinia," Sustainability, MDPI, vol. 11(17), pages 1-18, August.

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