2026-09-22T03:29:10Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/89107 2023-07-11 col_2142_5131 col_2142_27685 col_2142_14737 col_2142_97958 com_2142_5130 com_2142_10683 com_2142_690 com_2142_397 com_2142_8803

Matthews, Jefferey W. Skultety, Dennis Phillip 2016-03-02T20:23:15Z 2016-03-02T20:23:15Z 2018-03-03T10:15:17Z 2015-10-30 2015-12 Human modification of the landscape, including urbanization and road construction, has facilitated the spread and establishment of non-native plant species. Urban areas have often been introduction points for species and have a combination of factors making them susceptible to invasion; including reduced habitat area, loss of unique habitat types, and increased nutrient run-off. Roads facilitate the spread of non-native plant species by providing locally disturbed habitat and a corridor for propagule dispersal. I conducted two analyses to assess how changes in the environment through urbanization and road construction facilitate the distribution of non-native plant species. For these analyses I used species occurrence data from over 2000 wetlands within the Chicago region. In the first analysis I examined the influence of urbanization and roads on the occurrences of 15 non-native plant species. I found that species, or groups of species, responded differently to the effects of urbanization and roads. For example, occurrences of halophyte species were best predicted by road variables; halophytes were more commonly associated with major roads such as interstates and federal highways, road types that are likely to receive greater applications of de-icing salts. For the second analysis I examined non-native species composition and identified non-native-dominated community types; I then conducted a similarity-based analysis to show that these novel communities are repeated across the landscape in a predictable way. I evaluated the contribution of surrounding land cover, roads, and geographic distances among wetlands to the similarity of plant communities. Non-native species were found to be widespread across the region. I found that non-native species similarity was most strongly correlated with similarity of land cover within 100 m of wetlands. This analysis was repeated for identified community types. My findings that similar changes to the landscape have resulted in similar combinations of non-native species is evidence that anthropogenic drivers are creating novel habitats and ultimately novel community types. Together my analyses have implications for understanding and managing non-native plant species within urban areas. Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2017-12-01 The student, Dennis Skultety, accepted the attached license on 2015-10-29 at 14:44. The student, Dennis Skultety, submitted this Thesis for approval on 2015-10-29 at 14:51. This Thesis was approved for publication on 2015-10-30 at 08:38. DSpace SAF Submission Ingestion Package generated from Vireo submission #8749 on 2016-03-02 at 14:05:07 Made available in DSpace on 2016-03-02T20:23:15Z (GMT). No. of bitstreams: 3 SKULTETY-THESIS-2015.pdf: 1473675 bytes, checksum: 44fef80fb50eb800d874fae16d012388 (MD5) Skultety_Dennis.docx: 6208451 bytes, checksum: 9e92b06a9d41355539afd5b5feff3f7c (MD5) LICENSE.txt: 4212 bytes, checksum: 6f7653e97b2dbc35ddd9bc6100c09655 (MD5) Previous issue date: 2015-10-30 Embargo set by: Seth Robbins for item 91309 Lift date: 2018-03-02T20:24:31Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system U of I Only Restriction Lifted for Item 91309 on 2018-03-03T10:15:17Z. application/pdf http://hdl.handle.net/2142/89107 en Copyright 2015 Dennis Skultety wetlands halophytes non-native species distribution dissimilarity Distribution of non-native wetland plants is facilitated by urbanization and roads in the Chicago region text text Natural Resources & Environmental Sciences Natural Resources & Environmental Sciences University of Illinois at Urbana-Champaign Thesis M.S.