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    Spatiotemporal variation in survival rates: implications for population dynamics of yellow-bellied marmots

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    ArmitageK_2006.pdf (298.0Kb)
    Issue Date
    2006-04-01
    Author
    Ozgul, Arpat
    Armitage, Kenneth
    Blumstein, Daniel T.
    Oli, Madan K.
    Publisher
    Ecological Society of America
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Metadata
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    Abstract
    Spatiotemporal variation in age-specific survival rates can profoundly influence population dynamics, but few studies of vertebrates have thoroughly investigated both spatial and temporal variability in age-specific survival rates. We used 28 years (1976–2003) of capture–mark–recapture (CMR) data from 17 locations to parameterize an age-structured Cormack-Jolly-Seber model, and investigated spatial and temporal variation in age-specific annual survival rates of yellow-bellied marmots (Marmota flaviventris). Survival rates varied both spatially and temporally, with survival of younger animals exhibiting the highest degree of variation. Juvenile survival rates varied from 0.52 ± 0.05 to 0.78 ± 0.10 among sites and from 0.15 ± 0.14 to 0.89 ± 0.06 over time. Adult survival rates varied from 0.62 ± 0.09 to 0.80 ± 0.03 among sites, but did not vary significantly over time. We used reverse-time CMR models to estimate the realized population growth rate (λ), and to investigate the influence of the observed variation in age-specific survival rates on λ. The realized growth rate of the population closely covaried with, and was significantly influenced by, spatiotemporal variation in juvenile survival rate. High variability in juvenile survival rates over space and time clearly influenced the dynamics of our study population and is also likely to be an important determinant of the spatiotemporal variation in the population dynamics of other mammals with similar life history characteristics.
    Description
    This is the publisher's version, also available electronically from http://www.esajournals.org/doi/abs/10.1890/0012-9658%282006%2987%5B1027%3ASVISRI%5D2.0.CO%3B2
    URI
    http://hdl.handle.net/1808/15203
    DOI
    https://doi.org/10.1890/0012-9658(2006)87[1027:SVISRI]2.0.CO;2
    ISSN
    0012-9658
    Collections
    • Ecology & Evolutionary Biology Scholarly Works [1558]
    Citation
    Ozgul, Arpat; Armitage, Kenneth; Blumstein, Daniel T.; Oli, Madan K. (2006). "Spatiotemporal variation in survival rates: implications for population dynamics of yellow-bellied marmots." Ecology, 87(4):1027-1037. http://dx.doi.org/10.1890/0012-9658(2006)87[1027:SVISRI]2.0.CO;2

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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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