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    • Rangeland Ecology & Management, Volume 59 (2006)
    • Rangeland Ecology & Management, Volume 59, Number 2 (March 2006)
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    Herbaceous Vegetation Responses (1992-2004) to Restoration Treatments in a Ponderosa Pine Forest

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    Author
    Moore, Margaret M.
    Casey, Cheryl A.
    Bakker, Jonathan D.
    Springer, Judith D.
    Fulé, Peter Z.
    Covington, Wallace W.
    Laughlin, Daniel C.
    Issue Date
    2006-03-01
    Keywords
    understory production
    overstory-understory relationships
    thinning
    prescribed fire
    ecological restoration
    Pinus ponderosa
    southwest
    Gus Pearson Natural Area
    
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    Citation
    Moore, M. M., Casey, C. A., Bakker, J. D., Springer, J. D., Fulé, P. Z., Covington, W. W., & Laughlin, D. C. (2006). Herbaceous vegetation responses (1992–2004) to restoration treatments in a ponderosa pine forest. Rangeland Ecology & Management, 59(2), 135-144.
    Publisher
    Society for Range Management
    Journal
    Rangeland Ecology & Management
    URI
    http://hdl.handle.net/10150/643414
    DOI
    10.2111/05-051R2.1
    Additional Links
    https://rangelands.org/
    Abstract
    Ecological restoration treatments are widely applied in southwestern ponderosa pine forests to convert them to an open canopy structure similar to that found at the time of Euro-American settlement. An experiment was initiated in northern Arizona in 1994 to evaluate long-term ecosystem responses to 3 restoration treatments: 1) thinning from below (thinning), 2) thinning from below plus forest floor manipulation with periodic prescribed burning (composite), and 3) an untreated control. Results focus on total herbaceous and functional-group standing crop response to these restoration treatments. Pretreatment data were collected in 1992 and posttreatment responses were measured from 1994 through 2004. Total herbaceous standing crop was significantly higher on the 2 treated areas than on the control over the entire posttreatment period, but did not differ between the thinning and composite treatments. Plant functional groups responded differently to treatments and to drought. In general, the graminoid standing crop responded within several years after the initial treatments and continued to increase through time, until a series of severe droughts reduced standing crop to pretreatment levels. C3 graminoids dominated the standing-crop response, of which bottlebrush squirreltail (Elymus elymoides (Raf.) Swezey ssp. elymoides) was the primary contributor. C4 graminoids had a minimal response to restoration treatments, possibly because they were less abundant before the experiment began or because they were adversely affected by autumn burning. Legumes and forbs exhibited a 4-5 year lag before responding to the thinning and composite treatments. Annual and biennial plants showed a large biomass increase approximately 5 years after implementation of the composite treatment. The restoration goal of optimizing herbaceous standing crop must be weighed against the competing goals of increasing the abundance of specific functional groups, increasing biodiversity or rare plants, and managing invasive plant species. 
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2111/05-051R2.1
    Scopus Count
    Collections
    Rangeland Ecology & Management, Volume 59, Number 2 (March 2006)

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