KUKU

KU ScholarWorks

  • myKU
  • Email
  • Enroll & Pay
  • KU Directory
    • Login
    View Item 
    •   KU ScholarWorks
    • Ecology & Evolutionary Biology
    • Ecology & Evolutionary Biology Scholarly Works
    • View Item
    •   KU ScholarWorks
    • Ecology & Evolutionary Biology
    • Ecology & Evolutionary Biology Scholarly Works
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Habitat Selection under Temporal Heterogeneity: Exorcizing the Ghost of Competition Past

    Thumbnail
    View/Open
    Schmidt_2000.pdf (117.5Kb)
    Issue Date
    2000
    Author
    Schmidt, Kenneth A.
    Earnhardt, Joanne M.
    Brown, Joel S.
    Holt, Robert D.
    Publisher
    Ecological Society of America
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Rights
    Copyright by the Ecological Society of America
    Metadata
    Show full item record
    Abstract
    We investigate how coexistence between competitors may be influenced by habitat selection when habitats represent either sources or sinks, and given that dispersal is free to evolve. Evolutionary stable dispersal between source and sink habitats can occur if local fitnesses vary temporally, either due to intrinsic factors (e.g., chaotic dynamics) or extrinsic factors (e.g., environmental stochasticity). The model assumes locally linear Lotka- Volterra competition between two species. Given sufficiently low density-independent mortality in the sink, dispersal between habitats is an evolutionary stable strategy (ESS). Given a trade-off between competitive ability in the source and mortality in the sink, a sink habitat can promote species coexistence in the source habitat if the inferior competitor species experiences lower mortality in the sink. This highlights how sink habitats may provide mechanisms of coexistence in heterogeneous landscapes. In a second scenario, the competitors have distinct habitat preferences, resulting in the ‘‘Ghost of Competition Past’’ (i.e., complete habitat partitioning) with stable population dynamics. With unstable population dynamics, dispersal between habitats becomes the ESS, and the Ghost vanishes leading either to coexistence of the competitors in both habitats or global exclusion of one species. Our results highlight the importance of jointly considering the effects of spatial heterogeneity and temporal variability when analyzing the coexistence of competing, mobile organisms.
    URI
    http://hdl.handle.net/1808/16737
    DOI
    https://doi.org/10.1890/0012-9658(2000)081[2622:HSUTHE]2.0.CO;2
    Collections
    • Ecology & Evolutionary Biology Scholarly Works [1493]
    Citation
    Schmidt, K. A., Earnhardt, J. M., Brown, J. S., & Holt, R. D. (2000). Habitat selection under temporal heterogeneity: exorcizing the ghost of competition past. Ecology, 81(9), 2622–2630. http://dx.doi.org/10.1890/0012-9658(2000)081[2622:HSUTHE]2.0.CO;2

    Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.


    We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.


    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    Browse

    All of KU ScholarWorksCommunities & CollectionsThis Collection

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    The University of Kansas
      Contact KU ScholarWorks
    Lawrence, KS | Maps
     
    • Academics
    • Admission
    • Alumni
    • Athletics
    • Campuses
    • Giving
    • Jobs

    The University of Kansas prohibits discrimination on the basis of race, color, ethnicity, religion, sex, national origin, age, ancestry, disability, status as a veteran, sexual orientation, marital status, parental status, gender identity, gender expression and genetic information in the University’s programs and activities. The following person has been designated to handle inquiries regarding the non-discrimination policies: Director of the Office of Institutional Opportunity and Access, IOA@ku.edu, 1246 W. Campus Road, Room 153A, Lawrence, KS, 66045, (785)864-6414, 711 TTY.

     Contact KU
    Lawrence, KS | Maps