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    Author(s): Paul L. PattersonRenee A. O'Brien
    Date: 2011
    Source: Res. Pap. RMRS-RP-87. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 9 p.
    Publication Series: Research Paper (RP)
    Station: Rocky Mountain Research Station
    PDF: View PDF  (1.28 MB)

    Description

    The Interior West Forest Inventory and Analysis (IW-FIA) program of the USDA Forest Service collects field data on understory vegetation structure that have broad applications. In IW-FIA one aspect of quality assurance is assessed based on the repeatability of field measurements. The understory vegetation protocol consists of two suites of measurements; (1) the structure by lifeform and (2) the structure for individual species with cover greater than five percent. The measurements of structure by lifeform and species are highly repeatable; however, since species identification is confounded with cover threshold, the repeatability of species identification cannot be evaluated using FIA's tolerance and compliance rate protocol for measuring repeatability. The protocols used to collect the data analyzed in this paper are specific to IW-FIA. A standardized national understory vegetation procedure that is very similar to the IW-FIA procedure described here will be implemented in 2011 for all FIA units.

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    Citation

    Patterson, Paul L.; O'Brien, Renee A. 2011. Understory vegetation data quality assessment for the Interior West Forest and Inventory Analysis program. Res. Pap. RMRS-RP-87. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 9 p.

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    Keywords

    understory, vegetation, species, cover, forest inventory

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