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    • Rangeland Ecology & Management, Volume 66 (2013)
    • Rangeland Ecology & Management, Volume 66, Number 6 (November 2013)
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    Performance of Quantitative Vegetation Sampling Methods Across Gradients of Cover in Great Basin Plant Communities

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    Author
    Pilliod, David S.
    Arkle, Robert S.
    Issue Date
    2013-11-01
    Keywords
    canopy cover
    field methods
    protocols
    sagebrush steppe
    salt desert scrub
    
    Metadata
    Show full item record
    Citation
    Pilliod, D. S., & Arkle, R. S. (2013). Performance of quantitative vegetation sampling methods across gradients of cover in Great Basin plant communities. Rangeland Ecology & Management, 66(6), 634-647.
    Publisher
    Society for Range Management
    Journal
    Rangeland Ecology & Management
    URI
    http://hdl.handle.net/10150/642750
    DOI
    10.2111/REM-D-13-00063.1
    Additional Links
    https://rangelands.org/
    Abstract
    Resource managers and scientists need efficient, reliable methods for quantifying vegetation to conduct basic research, evaluate land management actions, and monitor trends in habitat conditions. We examined three methods for quantifying vegetation in 1-ha plots among different plant communities in the northern Great Basin: photography-based grid-point intercept (GPI), linepoint intercept (LPI), and point-quarter (PQ). We also evaluated each method for within-plot subsampling adequacy and effort requirements relative to information gain. We found that, for most functional groups, percent cover measurements collected with the use of LPI, GPI, and PQ methods were strongly correlated. These correlations were even stronger when we used data from the upper canopy only (i.e., top “hit” of pin flags) in LPI to estimate cover. PQ was best at quantifying cover of sparse plants such as shrubs in early successional habitats. As cover of a given functional group decreased within plots, the variance of the cover estimate increased substantially, which required more subsamples per plot (i.e., transect lines, quadrats) to achieve reliable precision. For GPI, we found that that six-nine quadrats per hectare were sufficient to characterize the vegetation in most of the plant communities sampled. All three methods reasonably characterized the vegetation in our plots, and each has advantages depending on characteristics of the vegetation, such as cover or heterogeneity, study goals, precision of measurements required, and efficiency needed.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2111/REM-D-13-00063.1
    Scopus Count
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    Rangeland Ecology & Management, Volume 66, Number 6 (November 2013)

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