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    Spatial Scaling of Prevalence and Population Variation in Three Grassland Sparrows

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    Spatial Scaling.pdf (1.150Mb)
    Issue Date
    2013-02
    Author
    Dornak, Laura Lynnette
    Barve, Narayani Vijay
    Peterson, A. Townsend
    Publisher
    University of California Press
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Metadata
    Show full item record
    Abstract
    Henslow's Sparrows (Ammodramus henslowii) are distributed in tallgrass prairies in central North America; however, this species is restricted further to specific habitats within these prairies—large expanses with relatively little woody vegetation but an accumulation of standing grasses and forbs, conditions that result from infrequent disturbances by fire, mowing, or grazing. Henslow's Sparrows have been documented to be unpredictable at breeding sites from year to year, but studies to date have considered only local spatial scales. We compared resettlement behavior (prevalence of occurrence and variation in abundance) of Henslow's Sparrows to that of two other grassland sparrows, Grasshopper Sparrows (A. savannarum) and Savannah Sparrows (Passerculus sandwichensis), across multiple spatial resolutions. In Henslow's Sparrows, prevalence was lower and variation in abundance was greater than in the other two species. Indeed, Henslow's Sparrows do not occur consistently at extents of less than 120 000 km2, suggesting nomadic characteristics of where they breed from year to year. We suggest that these patterns reflect Henslow's Sparrows' responses to frequently changing habitat, such that this species is tracking spatiotemporal changes in optimal habitat that result from disturbances broadly across regional landscapes.
    Description
    This is the publisher's version, also available electronically from http://www.bioone.org/doi/abs/10.1525/cond.2013.120055
    URI
    http://hdl.handle.net/1808/13338
    DOI
    https://doi.org/10.1525/cond.2013.120055
    ISSN
    0010-5422
    Collections
    • Distinguished Professors Scholarly Works [918]
    • Ecology & Evolutionary Biology Scholarly Works [1516]
    Citation
    Dornack, L. Lynnette; Barve, Narayani; and Peterson, A. Townsend. 2012. Spatial scaling of prevalence and population variation in three grassland sparrows. Condor :. http://dx.doi.org/10.1525/cond.2013.120055

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    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
     

     

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