{"id":{"repo_id":"ku","oai_identifier":"oai:kuscholarworks.ku.edu:1808/6304"},"canonical_url":"https://search.dev.ndltd.org/etd/ku/oai:kuscholarworks.ku.edu:1808/6304","repository":{"repo_id":"ku","name":"University of Kansas","base_url":"https://kuscholarworks.ku.edu/server/oai/request"},"display":{"title":"Population and community responses to anthropogenic environmental changes","abstract":"Humans are dramatically altering the planet. I use classic ecological theory, original conceptual models, and a novel analytical tool (Rank Occupancy-Abundance Profiles; ROAPs) to explore the effects anthropogenic changes have on plant communities and bird populations. Chapter one investigates the influence of nutrient deposition on native prairie grass communities. I show that soil phosphorus levels alter plant diversity by changing the degree to which mycorrhizae benefit plant species. Chapter two investigates plant extinctions in a fragmented landscape. Extinction rates of early-successional plant species on large versus small habitat patches vary according to species' life history traits. In Chapter three I quantify declines in North American bird species over the past 30 years. Nearly 20% of the 209 birds sampled are declining significantly; local densities tend to decline prior to occupancy. Results from this dissertation confirm that humans are dramatically altering the relative abundance of species--at local, landscape, and continental scales.","abstract_html":"Humans are dramatically altering the planet. I use classic ecological theory, original conceptual models, and a novel analytical tool (Rank Occupancy-Abundance Profiles; ROAPs) to explore the effects anthropogenic changes have on plant communities and bird populations. Chapter one investigates the influence of nutrient deposition on native prairie grass communities. I show that soil phosphorus levels alter plant diversity by changing the degree to which mycorrhizae benefit plant species. Chapter two investigates plant extinctions in a fragmented landscape. Extinction rates of early-successional plant species on large versus small habitat patches vary according to species' life history traits. In Chapter three I quantify declines in North American bird species over the past 30 years. Nearly 20% of the 209 birds sampled are declining significantly; local densities tend to decline prior to occupancy. Results from this dissertation confirm that humans are dramatically altering the relative abundance of species--at local, landscape, and continental scales.","abstract_has_math":false,"creators":["Collins, Cathy Diane"],"institution":"University of Kansas","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Foster, Bryan L"],"committee_chairs":[],"committee_members":[],"year":2009,"date_issued":"2009-04-01","date_published":"2009-04-01","updated_at":"2026-07-24T02:45:31Z","subjects":["Biology","Ecology","Extinction","Global change","Habitat fragmentation","Mycorrhizal fungi","Prairie","Roap"],"languages":["EN"],"rights":["This item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author."],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["http://dissertations.umi.com/ku:10226"],"render_values":[{"text":"http://dissertations.umi.com/ku:10226","href":"http://dissertations.umi.com/ku:10226","code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/1808/6304","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Foster, Bryan L"]},{"key":"dc:creator","label":"Author","values":["Collins, Cathy Diane"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2010-06-09T04:18:33Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2010-06-09T04:18:33Z"]},{"key":"dc:date.issued","label":"Date","values":["2009-04-01"]},{"key":"dc:publisher","label":"Institution","values":["University of Kansas"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Biology","Ecology","Extinction","Global change","Habitat fragmentation","Mycorrhizal fungi","Prairie","Roap"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["EN"]},{"key":"dc:rights","label":"Dc Rights","values":["This item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["http://dissertations.umi.com/ku:10226"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1808/6304"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Humans are dramatically altering the planet. I use classic ecological theory, original conceptual models, and a novel analytical tool (Rank Occupancy-Abundance Profiles; ROAPs) to explore the effects anthropogenic changes have on plant communities and bird populations. Chapter one investigates the influence of nutrient deposition on native prairie grass communities. I show that soil phosphorus levels alter plant diversity by changing the degree to which mycorrhizae benefit plant species. Chapter two investigates plant extinctions in a fragmented landscape. Extinction rates of early-successional plant species on large versus small habitat patches vary according to species' life history traits. In Chapter three I quantify declines in North American bird species over the past 30 years. Nearly 20% of the 209 birds sampled are declining significantly; local densities tend to decline prior to occupancy. Results from this dissertation confirm that humans are dramatically altering the relative abundance of species--at local, landscape, and continental scales."]},{"key":"dc:title","label":"Title","values":["Population and community responses to anthropogenic environmental changes"]}]}],"canonical_facts":{"dc:contributor.advisor":["Foster, Bryan L"],"dc:creator":["Collins, Cathy Diane"],"dc:date.accessioned":["2010-06-09T04:18:33Z"],"dc:date.available":["2010-06-09T04:18:33Z"],"dc:date.issued":["2009-04-01"],"dc:description.abstract":["Humans are dramatically altering the planet. I use classic ecological theory, original conceptual models, and a novel analytical tool (Rank Occupancy-Abundance Profiles; ROAPs) to explore the effects anthropogenic changes have on plant communities and bird populations. Chapter one investigates the influence of nutrient deposition on native prairie grass communities. I show that soil phosphorus levels alter plant diversity by changing the degree to which mycorrhizae benefit plant species. Chapter two investigates plant extinctions in a fragmented landscape. Extinction rates of early-successional plant species on large versus small habitat patches vary according to species' life history traits. In Chapter three I quantify declines in North American bird species over the past 30 years. Nearly 20% of the 209 birds sampled are declining significantly; local densities tend to decline prior to occupancy. Results from this dissertation confirm that humans are dramatically altering the relative abundance of species--at local, landscape, and continental scales."],"dc:identifier.other":["http://dissertations.umi.com/ku:10226"],"dc:identifier.uri":["http://hdl.handle.net/1808/6304"],"dc:language.iso":["EN"],"dc:publisher":["University of Kansas"],"dc:rights":["This item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author."],"dc:subject":["Biology","Ecology","Extinction","Global change","Habitat fragmentation","Mycorrhizal fungi","Prairie","Roap"],"dc:title":["Population and community responses to anthropogenic environmental changes"],"dc:type":["Dissertation"]},"updated_at":"2026-07-24T02:45:31Z"}