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  • Avian Use of Wildlife Overpasses

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    Pell_2016_01Thesis.pdf (1.671Mb)
    Author(s)
    Pell, Anthony Stuart
    Primary Supervisor
    Jones, Darryl
    Other Supervisors
    Bernede, Lilia
    Year published
    2016
    Metadata
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    Abstract
    Roads and road networks impact negatively on wildlife in a number of ways. Of major importance are vehicle-caused mortality, habitat fragmentation and barriers to animal movement. Together, the last two can lead to functional isolation of faunal populations, which, in turn, can potentially jeopardise the long-term persistence of wildlife populations. Wildlife overpasses are used to mitigate threats associated with the roads they span. Important conservation objectives are to allow safe passage and to maintain levels of dispersal between fragmented habitat areas, thereby allowing gene-flow and sustaining population viability ...
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    Roads and road networks impact negatively on wildlife in a number of ways. Of major importance are vehicle-caused mortality, habitat fragmentation and barriers to animal movement. Together, the last two can lead to functional isolation of faunal populations, which, in turn, can potentially jeopardise the long-term persistence of wildlife populations. Wildlife overpasses are used to mitigate threats associated with the roads they span. Important conservation objectives are to allow safe passage and to maintain levels of dispersal between fragmented habitat areas, thereby allowing gene-flow and sustaining population viability of target species. It might be assumed that birds, having the ability to fly, can accommodate the effects of fragmentation well, and will benefit little from wildlife overpasses. A major objective of my study therefore was to evaluate the conservation value of a wildlife overpass in allowing passage of birds between forest areas bisected by a major road. • Methodology: The study was centred on the wildlife overpass which spans Compton Road, a 60m-wide, major four-lane arterial road in suburban Brisbane. The 15m-wide vegetated overpass connects two subtropical Eucalyptus forest reserves, which are bisected by the major road. • Surveys were undertaken to compare bird abundance and species composition on the overpass and in nearby forest sites.
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    Thesis Type
    Thesis (Masters)
    Degree Program
    Master of Philosophy (MPhil)
    School
    Griffith School of Environment
    DOI
    https://doi.org/10.25904/1912/2492
    Copyright Statement
    The author owns the copyright in this thesis, unless stated otherwise.
    Item Access Status
    Public
    Subject
    Wildlife overpasses
    Roads, Environmental effects
    Barriers to animal movement
    Publication URI
    http://hdl.handle.net/10072/367053
    Collection
    • Theses - Higher Degree by Research

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