{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/20123"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/20123","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Proactive management of an endangered species on Army lands: The black-capped vireo on the lands of Fort Hood, Texas","abstract":"Under the Endangered Species Act, federal land managers are obliged to protect threatened and endangered species that occupy lands under their control. In the case of the U.S. Army, this may limit military training and testing activities and other land uses. In order to meet requirements of the Act while minimizing constraints on mission activities, the Army should take a proactive rather than a reactive approach to endangered species management. This approach is exemplified by a study of the Black-capped Vireo on Fort Hood, Texas.","abstract_html":"Under the Endangered Species Act, federal land managers are obliged to protect threatened and endangered species that occupy lands under their control. In the case of the U.S. Army, this may limit military training and testing activities and other land uses. In order to meet requirements of the Act while minimizing constraints on mission activities, the Army should take a proactive rather than a reactive approach to endangered species management. This approach is exemplified by a study of the Black-capped Vireo on Fort Hood, Texas.","abstract_has_math":false,"creators":["Tazik, David John"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Urban and Regional Planning","degree_department":null,"school":null,"contributors":["Osborne, Lewis L."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T12:29:31Z","date_published":"2011-05-07T12:29:31Z","updated_at":"2026-07-22T22:25:15Z","subjects":["Biology, Ecology","Biology, Zoology","Urban and Regional Planning"],"languages":["eng"],"rights":["Copyright 1991 Tazik, David John"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9124497","(UMI)AAI9124497"],"render_values":[{"text":"AAI9124497","href":null,"code":true},{"text":"(UMI)AAI9124497","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/20123","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Osborne, Lewis L."]},{"key":"dc:creator","label":"Author","values":["Tazik, David John"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T12:29:31Z","10000-01-01","1991"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Urban and Regional Planning"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Biology, Ecology","Biology, Zoology","Urban and Regional Planning"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1991 Tazik, David John"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9124497","(UMI)AAI9124497","http://hdl.handle.net/2142/20123"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Under the Endangered Species Act, federal land managers are obliged to protect threatened and endangered species that occupy lands under their control. In the case of the U.S. Army, this may limit military training and testing activities and other land uses. In order to meet requirements of the Act while minimizing constraints on mission activities, the Army should take a proactive rather than a reactive approach to endangered species management. This approach is exemplified by a study of the Black-capped Vireo on Fort Hood, Texas.","The study was initiated as a basis for developing a responsible, long-term management plan that could accommodate the needs of both the vireo and the Army. Nearly 280 adult vireos were found to occupy colony sites scattered across the installation, and an affinity was observed for certain landscape features. These relationships were used successfully to model potential habitat areas.","Quantification of vireo habitat associations confirmed that the species prefers abundant, low, heterogeneous hardwood cover with foliage to ground level, and a low density and cover of live juniper. Such habitat typically develops within 3 to 5 years after fire in otherwise mature oak-juniper woodland, and remains suitable for 25 or more years. Vireo habitat on the Fort appears to be abundant due to fires resulting from military activities.","The greatest threat to the vireo on Fort Hood is nest parasitism by the Brown-headed Cowbird. Between 65 and 90% of all nests were parasitized each year resulting in annual production of only 0.29 to 1.80 vireo young/female, substantially less than the estimated 2.67 required to maintain a stable population. Attempts to reduce cowbird numbers had no affect on vireo reproductive success.","Although military activities have had a net positive impact on the vireo, cattle grazing probably has aggravated the cowbird problem. Existing colony sites should be protected from military activity, and consideration should be given to modifying or eliminating cattle grazing on Fort Hood.","Made available in DSpace on 2011-05-07T12:29:31Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9124497.pdf: 11727316 bytes, checksum: a5d3e4668a6bebe34c6089ef2e662b08 (MD5) Previous issue date: 1991","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:41:43Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:18:05-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["Proactive management of an endangered species on Army lands: The black-capped vireo on the lands of Fort Hood, Texas"]}]}],"canonical_facts":{"dc:contributor":["Osborne, Lewis L."],"dc:creator":["Tazik, David John"],"dc:date":["2011-05-07T12:29:31Z","10000-01-01","1991"],"dc:description":["Under the Endangered Species Act, federal land managers are obliged to protect threatened and endangered species that occupy lands under their control. In the case of the U.S. Army, this may limit military training and testing activities and other land uses. In order to meet requirements of the Act while minimizing constraints on mission activities, the Army should take a proactive rather than a reactive approach to endangered species management. This approach is exemplified by a study of the Black-capped Vireo on Fort Hood, Texas.","The study was initiated as a basis for developing a responsible, long-term management plan that could accommodate the needs of both the vireo and the Army. Nearly 280 adult vireos were found to occupy colony sites scattered across the installation, and an affinity was observed for certain landscape features. These relationships were used successfully to model potential habitat areas.","Quantification of vireo habitat associations confirmed that the species prefers abundant, low, heterogeneous hardwood cover with foliage to ground level, and a low density and cover of live juniper. Such habitat typically develops within 3 to 5 years after fire in otherwise mature oak-juniper woodland, and remains suitable for 25 or more years. Vireo habitat on the Fort appears to be abundant due to fires resulting from military activities.","The greatest threat to the vireo on Fort Hood is nest parasitism by the Brown-headed Cowbird. Between 65 and 90% of all nests were parasitized each year resulting in annual production of only 0.29 to 1.80 vireo young/female, substantially less than the estimated 2.67 required to maintain a stable population. Attempts to reduce cowbird numbers had no affect on vireo reproductive success.","Although military activities have had a net positive impact on the vireo, cattle grazing probably has aggravated the cowbird problem. Existing colony sites should be protected from military activity, and consideration should be given to modifying or eliminating cattle grazing on Fort Hood.","Made available in DSpace on 2011-05-07T12:29:31Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9124497.pdf: 11727316 bytes, checksum: a5d3e4668a6bebe34c6089ef2e662b08 (MD5) Previous issue date: 1991","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:41:43Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:18:05-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"],"dc:identifier":["AAI9124497","(UMI)AAI9124497","http://hdl.handle.net/2142/20123"],"dc:language":["eng"],"dc:rights":["Copyright 1991 Tazik, David John"],"dc:subject":["Biology, Ecology","Biology, Zoology","Urban and Regional Planning"],"dc:title":["Proactive management of an endangered species on Army lands: The black-capped vireo on the lands of Fort Hood, Texas"],"dc:type":["text"],"thesis:degree_discipline":["Urban and Regional Planning"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:15Z"}