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    • Rangeland Ecology & Management, Volume 60 (2007)
    • Rangeland Ecology & Management, Volume 60, Number 3 (May 2007)
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    Influence of Plant Functional Group Removal on Inorganic Soil Nitrogen Concentrations in Native Grasslands

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    Author
    Davies, Kirk W.
    Pokorny, Monica L.
    Sheley, Roger L.
    James, Jeremy J.
    Issue Date
    2007-05-01
    Keywords
    ammonium
    competition
    grasslands
    nitrates
    removal experience
    seasonal nutrient use
    soil nutrients
    
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    Show full item record
    Citation
    Davies, K. W., Pokorny, M. L., Sheley, R. L., & James, J. J. (2007). Influence of plant functional group removal on inorganic soil nitrogen concentrations in native grasslands. Rangeland Ecology & Management, 60(3), 304-310.
    Publisher
    Society for Range Management
    Journal
    Rangeland Ecology & Management
    URI
    http://hdl.handle.net/10150/643161
    DOI
    10.2111/1551-5028(2007)60[304:IOPFGR]2.0.CO;2
    Additional Links
    https://rangelands.org/
    Abstract
    High plant functional group diversity has been hypothesized to reduce resource concentrations based on the assumption that species from one functional group acquire resources similarly to one another, while species from other functional groups acquire resources dissimilarly. To determine if functional groups use soil nutrients different from one another, we investigated the impact of removing individual functional groups on soil inorganic nitrogen (NO-3 and NH+4 ) concentrations in the Idaho fescue (Festuca idahoensis Elmer)/bluebunch wheatgrass (Pseudoroegneria spicata [Pursh] A. Löve) habitat type in Montana. Treatments were imposed by removing 1) all plant species (total plant removal), 2) shallow-rooted (< 15 cm) forbs, 3) deep-rooted (> 15 cm) forbs, 4) all forbs (total forb removal), 5) grasses, and 6) spikemoss, compared to intact control plots. Inorganic nitrogen was measured at 2 soil depths (0-15 cm and 16-40 cm) in the spring, summer, and fall 1 year after treatment imposition. The removal of individual functional groups generally increased soil NO-3 and NH+4 concentrations. Total plant removal increased NO-3 concentrations more than removing individual functional groups. Grass removal generally increased soil NO-3 concentrations in the 0-15-cm depth more than other functional groups removal. Whether the grass or total forb removal treatment resulted in greater soil NH+4 concentrations in the 0-15-cm depth depended on season. These results suggest that functional groups vary in their soil nutrient acquisition patterns and that increased functional diversity decreases soil nutrient concentrations. Therefore, maintaining or improving functional diversity may be a method to more fully utilize soil nutrients because functional groups can differ in their spatial and temporal acquisition of resources. 
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2111/1551-5028(2007)60[304:IOPFGR]2.0.CO;2
    Scopus Count
    Collections
    Rangeland Ecology & Management, Volume 60, Number 3 (May 2007)

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