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    • Rangeland Ecology & Management, Volume 61 (2008)
    • Rangeland Ecology & Management, Volume 61, Number 6 (November 2008)
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    Fire History in a Chaparral Ecosystem: Implications for Conservation of a Native Ungulate

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    Author
    Bleich, Vernon C.
    Johnson, Heather E.
    Holl, Stephen A.
    Konde, Lora
    Torres, Steven G.
    Krausman, Paul R.
    Issue Date
    2008-11-01
    Keywords
    California
    chaparral
    fire
    habitats
    mountain sheep
    Ovis canadensis
    restoration
    
    Metadata
    Show full item record
    Citation
    Bleich, V. C., Johnson, H. E., Holl, S. A., Konde, L., Torres, S. G., & Krausman, P. R. (2008). Fire history in a chaparral ecosystem: implications for conservation of a native ungulate. Rangeland Ecology & Management, 61(6), 571-579.
    Publisher
    Society for Range Management
    Journal
    Rangeland Ecology & Management
    URI
    http://hdl.handle.net/10150/642986
    DOI
    10.2111/07-016.1
    Additional Links
    https://rangelands.org/
    Abstract
    Mature chaparral vegetation in the San Gabriel Mountains, California, resulting from long fire-return intervals (50-70 yr), has resulted in reduced visibility and availability and quality of forage, all of which are important attributes of mountain sheep (Ovis canadensis) habitat. Concomitantly, vegetation changes have decreased availability and quality of forage. We developed a resource-selection model to determine the effect of fire history on habitat use by mountain sheep, examined the hypotheses that habitat selection was associated with fire occurrence, and determined whether fire occurrence influenced the amount of potential habitat available to mountain sheep. The best model indicated that mountain sheep selected vegetation that had burned within 15 yr and avoided areas that had not burned within that time frame. We then used our model to quantify potential changes in mountain sheep habitat that have occurred over time based on fire conditions. We identified 390 km2 of mountain sheep habitat that existed in 2002 (when only 63 mountain sheep were tallied), 486 km2 in 1980 (when the mountain sheep population was at its highest), and 422 km2 in 2004 (just after a series of large wildfires). We also estimated that 615 km2 of suitable habitat would be available in a hypothetical situation in which the entire study area burned. Our results suggest that restoration of mountain sheep to their historical distribution in chaparral ecosystems will depend upon more frequent fires in areas formerly occupied by those specialized herbivores. 
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2111/07-016.1
    Scopus Count
    Collections
    Rangeland Ecology & Management, Volume 61, Number 6 (November 2008)

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