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oai:www.ideals.illinois.edu:2142/14764 2023-07-10 col_2142_5131 col_2142_14737 com_2142_5130 com_2142_690 com_2142_397

2010-01-06T17:50:11Z 2010-01-06T17:50:11Z 2012-01-07T11:00:12Z Schooley, Robert L. Bucci, Lisa A. 2010-01-06T17:50:11Z Increased urban land cover and more intensive agriculture in the Midwest have changed the landscape for wildlife species. Distributions of semi-aquatic mammals such as muskrats (Ondatra zibethicus) may respond to environmental changes including increased urbanization, alteration of hydrology, introduction of invasive species, and changes in predator communities. The response of muskrat populations to landscape and local-scale changes is important for the conservation of this economically-valuable furbearer species. I completed multiple surveys for occupancy by muskrats at 90 sites in central Illinois in 2007 and 2008. Sites were stratified based on urbanization levels. Occupancy was determined by presence of tracks, scat, and feeding sign in 200-m stream segments that approximated a home-range scale. I calculated detection probabilities to determine the likelihood of false absences. The per-survey detection probability was 0.79 (SE = 0.04) in 2007 and 0.76 (SE = 0.04) in 2008. Detection was related positively to Julian date and negatively to wood debris abundance. Muskrats occurred more often at sites with a greater percentage of developed landcover, as well as in wider and deeper streams that drained more area. Year-to-year turnover was explained by water availability and measures of stream size. Although invasive reed canary grass was the dominant species at an average of 2.3 (SE = 0.20) out of 5 habitat sampling stations per site, it did not affect site occupancy or turnover. Occupancy patterns may be related to lower predation risk near human development and in wider, deeper streams. Overall, muskrat distribution was related to local and landscape variables and was insensitive to some aspects of environmental change. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2009-12-08T21:42:53Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 LBucci_Anthropogenic_environmental_change_and_habitat_occupancy_by_riparian_muskrats_in_a_midwestern_landscape.pdf: 323309 bytes, checksum: af6a888fa73fc2246bc94c636b6d1a10 (MD5) LBucci_Anthropogenic_environmental_change_and_habitat_occupancy_by_riparian_muskrats_in_a_midwestern_landscape.doc: 372224 bytes, checksum: 3a709669c4d27acd73e95ecc3a381042 (MD5) Made available in DSpace on 2010-01-06T17:50:11Z (GMT). No. of bitstreams: 4 LBucci_Anthropogenic_environmental_change_and_habitat_occupancy_by_riparian_muskrats_in_a_midwestern_landscape.pdf: 323309 bytes, checksum: af6a888fa73fc2246bc94c636b6d1a10 (MD5) license.txt: 4059 bytes, checksum: 81ebd2d5fbc0982efa38bdad35056f46 (MD5) LBucci_Anthropogenic_environmental_change_and_habitat_occupancy_by_riparian_muskrats_in_a_midwestern_landscape.doc: 372224 bytes, checksum: 3a709669c4d27acd73e95ecc3a381042 (MD5) Bucci_Lisa.pdf: 323105 bytes, checksum: 02849e5fc13cf3d0f92bfffa00b4a3bf (MD5) Item marked as restricted to the 'Administrator' Group (id=1) by William Ingram (wingram2@illinois.edu) on 2010-01-06T17:50:32Z Item is restricted until 2012-01-06T17:50:31Z Item reinstated by Sarah Shreeves (sshreeve@illinois.edu) on 2012-01-07T11:00:12Z Item was in collections: University of Illinois Dissertations and Theses (ID: 204) Dissertations and Theses - Natural Resources and Environmental Sciences (ID: 671) No. of bitstreams: 5 Bucci_Lisa.pdf.txt: 79623 bytes, checksum: 1e0ad89edb829e7ef9334ffff80f1c37 (MD5) LBucci_Anthropogenic_environmental_change_and_habitat_occupancy_by_riparian_muskrats_in_a_midwestern_landscape.pdf: 323309 bytes, checksum: af6a888fa73fc2246bc94c636b6d1a10 (MD5) license.txt: 4059 bytes, checksum: 81ebd2d5fbc0982efa38bdad35056f46 (MD5) LBucci_Anthropogenic_environmental_change_and_habitat_occupancy_by_riparian_muskrats_in_a_midwestern_landscape.doc: 372224 bytes, checksum: 3a709669c4d27acd73e95ecc3a381042 (MD5) Bucci_Lisa.pdf: 323105 bytes, checksum: 02849e5fc13cf3d0f92bfffa00b4a3bf (MD5) Item released from any restrictions by Sarah Shreeves (sshreeve@illinois.edu) on 2012-01-07T11:00:12Z http://hdl.handle.net/2142/14764 en Copyright 2009 Lisa A. Bucci muskrat Ondatra zibethicus landscape ecology occupancy modeling urban adapter Phalaris arundinacea imperfect detection predictive habitat model Anthropogenic environmental change and habitat occupancy by riparian muskrats in a Midwestern landscape 2009-12 Natural Resources and Environmental Sciences 1875 Natural Resources and Environmental Sciences 0190 University of Illinois at Urbana-Champaign Thesis M.S. MS:Nat Res & Envrn Sci -UIUC 10KS0190MS