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    A Protocol for Retrospective Remote Sensing-Based Ecological Monitoring of Rangelands

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    Author
    Washington-Allen, Robert A.
    West, Neil E.
    Douglas Ramsey, R.
    Efroymson, Rebecca A.
    Issue Date
    2006-01-01
    Keywords
    catastrophe theory
    ecological indicators
    land degradation
    Landsat
    trend
    
    Metadata
    Show full item record
    Citation
    Washington-Allen, R. A., West, N. E., Ramsey, R. D., & Efroymson, R. A. (2006). A protocol for retrospective remote sensing–based ecological monitoring of rangelands.  Rangeland Ecology & Management, 59(1), 19-29.
    Publisher
    Society for Range Management
    Journal
    Rangeland Ecology & Management
    URI
    http://hdl.handle.net/10150/643400
    DOI
    10.2111/04-116R2.1
    Additional Links
    https://rangelands.org/
    Abstract
    The degree of rangeland degradation in the United States is unknown due to the failure of traditional field-based monitoring to capture the range of variability of ecological indicators and disturbances, including climatic effects and land use practices, at regional to national spatial scales, and temporal scales of decades. Here, a protocol is presented for retrospective monitoring and assessment of rangeland degradation using historical time series of remote sensing data and catastrophe theory as an ecological framework to account for both gradual and rapid changes of state. This protocol 1) justifies the use of time-series satellite imagery in terms of the spatial and temporal scale of data collection; 2) briefly explains how to acquire, process, and transform the data into ecological indicators; 3) discusses the use of time-series analysis as the appropriate procedure for detecting significant change; and 4) explains what reference conditions are appropriate. Landsat data have been collected and archived since 1972, and include complete coverage of US rangelands. Characteristics of land degradation can be retrospectively measured for a nearly 33-year trend using surrogate remote sensing-based indicators that correlate with changes in life-form composition (time series of thematic maps), declines in vegetation productivity (vegetation indices), accelerated soil erosion (soil indices), declines in soil quality (piospheric analysis), and changes in landscape configuration (time series of thematic maps). Aspects of 2 retrospective studies are presented as examples of application of the protocol to considerations of the land use impacts from military training and testing and ranching activities on rangelands. 
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2111/04-116R2.1
    Scopus Count
    Collections
    Rangeland Ecology & Management, Volume 59, Number 1 (January 2006)

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