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    Modeling future range expansion and management strategies for an invasive squirrel species

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    Name:
    GoldsteinButlerLawton BiolInv2 ...
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    2.130Mb
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    Description:
    Final Accepted Manuscript
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    Author
    Goldstein, Emily A.
    Butler, Fidelma
    Lawton, Colin
    Affiliation
    School of Natural Resources and the Environment, ENR2, University of Arizona
    Issue Date
    2016-02-18
    Keywords
    Cull - Immunocontraceptive vaccine
    Invasion dynamics
    Grey squirrel
    SEPM
    Sciurus carolinensis
    
    Metadata
    Show full item record
    Publisher
    Springer
    Citation
    Modeling future range expansion and management strategies for an invasive squirrel species 2016, 18 (5):1431 Biological Invasions
    Journal
    Biological Invasions
    Rights
    Copyright © Springer International Publishing Switzerland 2016.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Successful management of an invasive species requires in depth knowledge of the invader, the invaded ecosystem, and their interactions. The complexity of the species-system interactions can be reduced and represented in ecological models for better comprehension. In this study, a spatially explicit population model was created using the RAMAS software package to simulate the past and future invasion dynamics of the eastern grey squirrel (Sciurus carolinensis) in the fragmented habitat in case study areas in Ireland. This invasive squirrel species causes economic damage by bark stripping forest crops and is associated with the decline of its native congener (S. vulgaris). Three combinations of demographic and dispersal parameters, which best matched the distribution of the species shortly after introduction, were used to simulate invasion dynamics. Future population expansion was modeled under scenarios of no control and two different management strategies: fatal culls and immunocontraceptive vaccination programmes. In the absence of control, the grey squirrel range is predicted to expand to the south and southwest of Ireland endangering internationally important habitats, vulnerable forest crops, and the native red squirrel. The model revealed that region-wide intensive and coordinated culls would have the greatest impact on grey squirrel populations. Control strategies consisting solely of immunocontraceptive vaccines, often preferred by public interest groups, are predicted to be less effective. Complete eradication of the grey squirrel from Ireland is not economically feasible and strategic evidence-based management is required to limit further range expansion. Ecological models can be used to choose between informed management strategies based on predicted outcomes.
    ISSN
    1387-3547
    1573-1464
    DOI
    10.1007/s10530-016-1092-7
    Version
    Final accepted manuscript
    Additional Links
    http://link.springer.com/10.1007/s10530-016-1092-7
    ae974a485f413a2113503eed53cd6c53
    10.1007/s10530-016-1092-7
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