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dc.contributor.authorAndersen, Erik M.
dc.contributor.authorSteidl, Robert J.
dc.date.accessioned2020-11-18T23:02:16Z
dc.date.available2020-11-18T23:02:16Z
dc.date.issued2020-01-14
dc.identifier.citationAndersen, E. M., & Steidl, R. J. (2020). Plant invasions alter settlement patterns of breeding grassland birds. Ecosphere, 11(1), e03012.en_US
dc.identifier.issn2150-8925
dc.identifier.doi10.1002/ecs2.3012
dc.identifier.urihttp://hdl.handle.net/10150/648550
dc.description.abstractAnimals have evolved strategies to identify areas that provide the resources and environmental conditions they need to survive and reproduce. To explore how invasions by nonnative plants might disrupt this fundamental process, we evaluated settlement patterns of migratory birds that breed in grasslands being invaded by two structurally different congeneric grasses. We established 40, 2.25-ha plots across an area where the composition of each nonnative grass ranged from 0% to nearly 100% of total grass cover, which provided individuals with the full range of alternatives in species composition. We then used the temporal sequence by which birds established territories to infer their habitat preferences. We evaluated responses of the most common species that settled the area, two confamilial sparrows that differed markedly in habitat breadth. The species with narrower habitat breadth, the grasshopper sparrow (Ammodramus savannarum ammolegus), first established territories in areas dominated by native grasses, where grass height and cover were substantially lower than in areas dominated by the nonnative grasses. As the settlement period progressed, they increasingly established territories in areas dominated by the smaller nonnative grass (Eragrostis lehmanniana), but never established territories in areas dominated by the larger grass (E. curvula). In contrast, the species with broader habitat breadth, the Botteri's sparrow (Peucaea botterii arizonae), established territories without regard to grass composition, likely because both nonnative grasses were within the structural range of native grasses used by this grassland generalist. Our results demonstrate that in areas invaded by nonnative plants, changes in habitat use by animals can reflect the interaction between their habitat breadth and the amount of structural contrast between invading plants and the native plant species that are displaced. This interaction provides a mechanism to explain the variation in responses among species to invasions by nonnative plants, which has consequences for broad-scale changes in the geographic distribution of many species.en_US
dc.description.sponsorshipU.S. Bureau of Land Managementen_US
dc.language.isoenen_US
dc.publisherWILEYen_US
dc.rights© 2020 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en_US
dc.subjectarrival dateen_US
dc.subjectexotic speciesen_US
dc.subjectgrasslandsen_US
dc.subjecthabitat preferencesen_US
dc.subjecthabitat selectionen_US
dc.subjectnonnative grassesen_US
dc.titlePlant invasions alter settlement patterns of breeding grassland birdsen_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Sch Nat Resources & Environmen_US
dc.identifier.journalECOSPHEREen_US
dc.description.noteOpen access journalen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleEcosphere
dc.source.volume11
dc.source.issue1
refterms.dateFOA2020-11-18T23:02:30Z


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© 2020 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Except where otherwise noted, this item's license is described as © 2020 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.