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    Partitioning the effects of plant biomass and litter on Andropogon gerardi in old-field vegetation

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    FosterB_Ecology_78(7)2091.pdf (188.8Kb)
    Issue Date
    1997-10-01
    Author
    Foster, Bryan L.
    Gross, Katherine L.
    Publisher
    Ecological Society of America
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Rights
    Copyright by the Ecological Society of America
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    Abstract
    We examined the effects of living plant neighbors and litter on the performance of a native C4 grass, Andropogon gerardi, at five old-field sites that differ in community biomass and soil fertility. We used plant removal experiments in which both living neighbors and litter were manipulated in a factorial arrangement of treatments over one growing season. Andropogon was added to treatment plots as seeds and as established transplants to examine the effects of the surrounding plant community on the recruitment and established phases of its life history.

    Neighbors negatively affected Andropogon performance at all sites, indicating that resource exploitation by living plants was an important constraint to seedling recruitment and growth across the range of community biomass examined. Plant litter negatively affected recruitment at sites with the greatest community biomass, but had no effect on the growth of established transplants at any of the sites. The total effect of the surrounding plant community on recruitment was positively correlated with community biomass due to an increasing impact of plant litter. However, the total effect of the surrounding community on the growth of established transplants was unrelated to community biomass.

    The results suggest that it may be during the recruitment phase of the life history, when seeds and seedlings are especially susceptible to the effects of both litter and living neighbors, that Andropogon is most sensitive to variation in community biomass. Variation in the effects of litter on recruitment may be important in regulating plant species diversity and the distribution of native C4 grasses along old-field biomass gradients in southwest Michigan.
    URI
    http://hdl.handle.net/1808/16490
    DOI
    https://doi.org/10.1890/0012-9658(1997)078[2091:PTEOPB]2.0.CO;2
    ISSN
    0012-9658
    Collections
    • Ecology & Evolutionary Biology Scholarly Works [1516]
    Citation
    Foster, Bryan L.; Gross, Katherine L. (1997). "Partitioning the effects of plant biomass and litter on Andropogon gerardi in old-field vegetation." Ecology, 78(7):2091-2104. http://dx.doi.org/10.1890/0012-9658(1997)078[2091:PTEOPB]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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