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    • Journal of Range Management, Volume 48 (1995)
    • Journal of Range Management, Volume 48, Number 6 (November 1995)
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    Invasive potential of ashe juniper after mechanical disturbance

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    Author
    Owens, M. K.
    Schliesing, T. G.
    Issue Date
    1995-11-01
    Keywords
    Juniperus ashei
    woody weeds
    seed banks
    viability
    invasion
    seedlings
    spatial distribution
    Texas
    seed germination
    
    Metadata
    Show full item record
    Citation
    Owens, M. K., & Schliesing, T. G. (1995). Invasive potential of ashe juniper after mechanical disturbance. Journal of Range Management, 48(6), 503-507.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644277
    DOI
    10.2307/4003060
    Additional Links
    https://rangelands.org/
    Abstract
    Reinvasion of mechanically disturbed juniper communities is possible through contributions from the soil seedbank, seed rain, and the juvenile seedling bank. We compared spatial distribution of the seedbank and seed rain of undisturbed communities to sites where trees were deliberately left as single trees, small mottes of less than 5 trees per group, or large mottes of 5-10 trees per group. Seed density in the litter layer ranged from 1,197 to 1,436 seeds m-2 and in the soil layer from 318 to 617 seeds m-2. Seed rain ranged from 275 to 366 seeds m-2 over all tree arrangements. The treatment associated with single trees caused the litter layer to be removed resulting in the removal of that portion of the seedbank, consequently most seeds (>80%) were found under the canopy of mature, seed-producing trees. Soil disturbance was less severe in small and large motte arrangements, so only 65% of the soil seed bank was under mature trees. In undisturbed communities, the seed population was distributed evenly under tree canopies and in interspaces. Viability and germinability within the seedbank were low (4% and 0%, respectively). Viability of new seed was 47% and germinability was approximately 5%. The juvenile seedling bank contained a sufficient number of seedlings (408 seedlings ha-1) for ashe juniper to regain dominance on the site through growth. There was no advantage to any spatial pattern of tree distribution in terms of invasive potential when fewer than 10 trees ha-1 were left on a site. However, when 20-50 trees ha-1 are left on a site, tree spatial arrangement has a significant effect on reinvasion rates.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4003060
    Scopus Count
    Collections
    Journal of Range Management, Volume 48, Number 6 (November 1995)

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