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    • Rangeland Ecology & Management, Volume 58 (2005)
    • Rangeland Ecology & Management, Volume 58, Number 5 (September 2005)
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    Multiscale Detection of Sulfur Cinquefoil Using Aerial Photography

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    Author
    Naylor, Bridgett J.
    Endress, Bryan A.
    Parks, Catherine G.
    Issue Date
    2005-09-01
    Keywords
    remote sensing
    Potentilla recta
    image analysis
    invasive plants
    noxious weeds
    exotic species
    Oregon
    
    Metadata
    Show full item record
    Citation
    Naylor, B. J., Endress, B. A., & Parks, C. G. (2005). Multiscale detection of sulfur cinquefoil using aerial photography. Rangeland Ecology & Management, 58(5), 447-451.
    Publisher
    Society for Range Management
    Journal
    Rangeland Ecology & Management
    URI
    http://hdl.handle.net/10150/643363
    DOI
    10.2111/1551-5028(2005)58[447:MDOSCU]2.0.CO;2
    Additional Links
    https://rangelands.org/
    Abstract
    We evaluated the effectiveness of natural color aerial photography as a tool to improve detection, monitoring, and mapping of sulfur cinquefoil (Potentilla rectaL.) infestations. Sulfur cinquefoil is an exotic perennial plant invading interior Pacific Northwest rangelands. Because sulfur cinquefoil produces distinctive pale yellow flowers, we timed aerial photography for early July, when the plant was at peak bloom. Photography was collected at 3 spatial scales (1:3 000, 1:6 000, and 1:12 000). A grid with 250-m spacing was superimposed over photographs of the entire study area using geographic information systems. At eac hgrid intersection point (n=80), we visually analyzed the photographs within a 404.7-m2 (0.1 acre) circular plot, recorded sulfur cinquefoil presence, and estimated sulfur cinquefoil percent cover. Sample points on the grid were then located in the field using a global positioning system. Field data collected at each point included sulfur cinquefoil presence, percent cover, and stem density; and total vegetation composition and percent cover by life form. Results indicate that the accuracy of detecting sulfur cinquefoil increased from small to large scale. At the 1:3 000 scale, sulfur cinquefoil presence was correctly identified in 76.9% of the sites, whereas at the 1:6 000 and 1:12 000 scales, infestations were identified in 67.9% and 59.1% of the sites, respectively. Low-density infestations (<1% cover) were detected at all scales. Accuracy of percent cover estimates ranged from 33.8% to 38.0% across scales. Although tree canopy hindered detection, our results indicate that aerial photography can be used to detect sulfur cinquefoil infestations in open forests and rangelands in the Intermountain West.  
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2111/1551-5028(2005)58[447:MDOSCU]2.0.CO;2
    Scopus Count
    Collections
    Rangeland Ecology & Management, Volume 58, Number 5 (September 2005)

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