2026-09-22T14:57:10Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/102922 2023-07-11 col_2142_5131 col_2142_14737 col_2142_97958 col_2142_27685 com_2142_5130 com_2142_690 com_2142_397 com_2142_8803 com_2142_10683

Limited Restriction Lifted for Item 109948 on 2021-02-09T10:15:34Z. application/pdf Ward, Michael P. Benson, Thomas J. Van den Bosch, Kyle 2019-02-08T18:39:52Z 2019-02-08T18:39:52Z 2021-02-09T10:15:34Z 2018-11-30 2018-12 Across the guild of shrubland birds, some species have been experiencing long-term population declines while other have been increasing. One potential reason for these differences is that various shrubland bird species prefer different types of shrubland habitat and some habitats are more common than others. However, we lack a clear understanding of the attributes of shrublands that shrubland birds prefer. Specifically, we lack information on how the percent shrub cover, the proportion of shrubs comprised of non-native shrubs, the patchiness of shrubs, and the surrounding landscape context influence occupancy (the probability that a given species will be at a site) of shrubland birds. To better understand these relationships I used bird survey and vegetation data from a long-term monitoring program that randomly monitored shrublands across the state of Illinois. I examined the influence of landscape and site-level variables on the occupancy of 22 shrubland bird species. Generally, the proportion of non-native shrubs at a site had little influence on shrubland bird occupancy. Shrubland birds responded positively to both the percent shrub cover and to the patchiness of shrubs; however the strength of the relationship differed between species. Over half (6/10) of the species that are experiencing population declines in the region (as determined by Breeding Bird Survey data) responded strongly to the patchiness of the shrubs, whereas, only 3 of the 12 shrubland species whose populations were either stable or increased responded to the patchiness of shrubs. The difference in population trends across the suite of shrubland birds may be driven by preferences for patchy shrublands. When creating or managing shrubland habitat, it is important to consider that the presence of shrubs is not enough and that the patchiness of shrubs may be important for a subset of shrubland birds. Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2020-12-01 The student, Kyle Van den Bosch, accepted the attached license on 2018-11-27 at 20:44. The student, Kyle Van den Bosch, submitted this Thesis for approval on 2018-11-27 at 20:56. This Thesis was approved for publication on 2018-11-30 at 13:12. DSpace SAF Submission Ingestion Package generated from Vireo submission #13128 on 2019-02-08 at 11:40:20 Made available in DSpace on 2019-02-08T18:39:52Z (GMT). No. of bitstreams: 2 VANDENBOSCH-THESIS-2018.pdf: 612008 bytes, checksum: 596ea832c6de8667653c928020849b7e (MD5) LICENSE.txt: 4215 bytes, checksum: 169b715042225c9abe337b2a90db7b69 (MD5) Previous issue date: 2018-11-30 Embargo set by: Seth Robbins for item 109948 Lift date: 2021-02-08T18:40:00Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system Embargo set by: Seth Robbins for item 109948 Lift date: 2021-02-08T18:42:23Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system Embargo set by: Seth Robbins for item 109948 Lift date: 2021-02-08T18:43:54Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system Embargo set by: Seth Robbins for item 109948 Lift date: 2021-02-08T18:44:50Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system http://hdl.handle.net/2142/102922 en Copyright 2018 Kyle Van den Bosch Shrubland birds occupancy vegetation structure landscape Influence of vegetation structure and landscape context on the occupancy of shrubland birds text text Natural Res & Env Sci Natural Res & Env Sciences University of Illinois at Urbana-Champaign Thesis M.S.