Literaturdatenbank
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Sirois, A. M. (2011). Effects of habitat alterations on bog turtles (glyptemys muhlenbergii): A contrast of responses by two populations in massachusetts, usa. Unpublished thesis , State University of New York, New York.
Added by: Sarina Wunderlich (06 Jul 2014 16:17:22 UTC) |
| Resource type: Thesis/Dissertation BibTeX citation key: anon2011.16497 View all bibliographic details  |
Categories: General Keywords: Habitat - habitat, Nordamerika - North America, Pelodiscus sinensis, Schildkröten - turtles + tortoises, Trionychidae Creators: Sirois Publisher: State University of New York (New York) |
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| Abstract |
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The bog turtle (Glyptemys muhlenbergii ) is particularly threatened by habitat changes, yet the potential for habitat management to reverse habitat degradation is not known. Bog turtle demography and habitat use over the period 1983 to 2009 were contrasted at two sites in Massachusetts: one managed for invasive species and successional changes (Site 1) and the other degraded due to flooding from beaver activity (Site 2). The extent of highly suitable habitat at Site 1 remained the same (1997: x ̄ = 28% ± 17 CI, n = 25; 2009: x ̄ = 29% ± 19, n = 25) whereas Site 2 underwent an increase in the extent of low suitability habitat (1997: x ̄ = 5% ± 15, n = 25; 2009: x ̄ = 39% ± 16, n = 25). Measurement of population response based on mark-recapture of 90 individual turtles indicated that survival rates and population sizes remained stable before and after habitat interventions at Site 1, whereas population size declined at Site 2 between 1996 (x ̄= 38 ± 6.44, n = 46) and 2009 (x ̄ = 20 ± 4.32, n = 46). Together these results suggest that habitat management and restoration efforts can improve the status of bog turtle populations albeit over time frames of several decades.
Added by: Sarina Wunderlich |