• Login
    View Item 
    •   MINDS@UW Home
    • MINDS@UW Stout
    • Theses and Dissertations
    • UW-Stout Masters Thesis Collection - Plan A
    • View Item
    •   MINDS@UW Home
    • MINDS@UW Stout
    • Theses and Dissertations
    • UW-Stout Masters Thesis Collection - Plan A
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Habitat and Conservation of the Endemic Grenada Frog (Pristimantis euphronides)

    Thumbnail
    File(s)
    2021harrisonb.pdf (2.084Mb)
    Date
    2021
    Author
    Harrison, Billie C.
    Publisher
    University of Wisconsin--Stout
    Department
    Conservation Biology
    Advisor(s)
    Beston, Julie
    Metadata
    Show full item record
    Abstract
    Invasive species, loss of habitat and climate change are just some of the many threats accelerating biodiversity loss. Understanding their impacts on endangered species is key to implementing effective conservation. The endemic Grenada frog (Pristimantis euphronides) is found only in high elevation cloud forests, habitat that is being invaded by the introduced Lesser Antillean frog (Eleutherodactylus johnstonei) and threatened by climate change. Between 2004 and 2020, our field team surveyed three key sites in the central highlands of Grenada to monitor populations of P. euphronides. Using generalized linear models and Spearman’s rank analysis, I found that the invasive E. johnstonei had a positive relationship with the endemic P. euphronides within each location (𝑡𝑡 = 2.830, 𝑑𝑑𝑑𝑑 = 159, 𝑝𝑝 = 0.005), but a negative correlation overall (𝜌𝜌=−0. 467). This shows the broad impacts of E. johnstonei on P. euphronidesdespite observations that the two species tend to increase together within each site. Sites differed significantly in abundance of P. euphronides, indicating that the differences in conditions at each site are worth examining further. We also created a potential habitat map that produced a larger potential range than previously identified, but more scouting and surveys are needed to properly assess the occupancy of this area. Because the overall negative impact of the invasive Lesser Antillean frog on the endemic Grenada frog was not detectable within sites where the relationship was positive, the importance of wider assessments to fully disentangle the myriad of pressures facing endangered species cannot be overstated.
    Permanent Link
    http://digital.library.wisc.edu/1793/83085
    Type
    Thesis
    Description
    Plan A
    Part of
    • UW-Stout Masters Thesis Collection - Plan A

    Contact Us | Send Feedback
     

     

    Browse

    All of MINDS@UWCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    Login

    Contact Us | Send Feedback