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    • Journal of Range Management, Volume 55 (2002)
    • Journal of Range Management, Volume 55, Number 4 (July 2002)
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    Density and reproductive success of Florida grasshopper sparrows following fire

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    Author
    Delany, M. F.
    Linda, S. B.
    Pranty, B.
    Perkins, D. W.
    Issue Date
    2002-07-01
    Keywords
    ammodramus savannarum
    territory
    endangered species
    wild birds
    population density
    fire ecology
    reproductive performance
    Florida
    prescribed burning
    seasonal variation
    rangelands
    Ammodramus savannarum floridanus
    Florida prairie
    prescribed fire
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    Citation
    Delany, M. F., Linda, S. B., Pranty, B., & Perkins, D. W. (2002). Density and reproductive success of Florida Grasshopper Sparrows following fire. Journal of Range Management, 55(4), 336-340.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/643667
    DOI
    10.2307/4003469
    10.2458/azu_jrm_v55i4_delany
    Additional Links
    https://rangelands.org/
    Abstract
    Information on the response of the endangered Florida grasshopper sparrow (Ammodramus savannarum floridanus Mearns) to range management, especially prescribed fire, is needed to determine conservation strategies. Intensive management of grasslands for cattle grazing and conversion of grassland to other agricultural use is considered the greatest threat to the sparrow. Territory spot-mapping and estimates of reproductive success were examined in relation to time post-burn in managed cattle pastures at Avon Park Air Force Range, Highlands County, Florida from 1997-1999. We tested the hypothesis that sparrow density and reproductive success did not depend on time following fire. Contrary to previous work, there was no evidence that Florida grasshopper sparrow territory density depended on years post-burn (P = 0.842). The probability of reproductive success was significantly higher 0.5 year post-burn than at 1.5 years post-burn (P < 0.05) and 2.5 years post-burn (P < 0.01). No other significant differences were observed among years post-burn (P > 0.27 for each pairwise comparison between years). No simple trend or highly significant polynomial relationship between reproductive success and territory density was indicated (P > 0.41). Compared to other subspecies, Florida grasshopper sparrows exhibited relatively low density (0.22 territories/ha or less) and reproductive success (20%). Our results suggest increased reproductive success at a population level 0.5 year following fire, and did not suggest an association between territory density and individual reproductive success. Additional information is needed on the effects of seasonality of fire on Florida grasshopper sparrows.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4003469
    Scopus Count
    Collections
    Journal of Range Management, Volume 55, Number 4 (July 2002)

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