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    Remote-Sensed Mapping of Sargassum spp. Distribution around Rottnest Island, Western Australia using High Spatial Resolution WorldView-2 Satellite Data

    Access Status
    Fulltext not available
    Authors
    Hoang Cong, Tin
    O'Leary, Mick
    Fotedar, Ravi
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Hoang Cong, T. and O'Leary, M. and Fotedar, R. 2016. Remote-Sensed Mapping of Sargassum spp. Distribution around Rottnest Island, Western Australia using High Spatial Resolution WorldView-2 Satellite Data. Journal of Coastal Research. 32 (6): pp. 1310-1321.
    Source Title
    Journal of Coastal Research
    DOI
    10.2112/JCOASTRES-D-15-00077.1
    ISSN
    0749-0208
    School
    Department of Environment and Agriculture
    URI
    http://hdl.handle.net/20.500.11937/39734
    Collection
    • Curtin Research Publications
    Abstract

    Satellite remote sensing is one of the most efficient techniques for marine habitat studies in shallow coastal waters, especially in clear waters where field observations can be easily carried out. However, such in situ observations have certain limitations: they are time consuming, have a limited ability to capture spatial variability, and require an interdisciplinary approach between marine biologists and remote-sensing specialists. The main objective of this study was to survey and map Sargassum beds around Rottnest Island, Western Australia, through a combination of high spatial resolution WorldView-2 imagery, using a validated depth invariant index model for water-column correction, and in-field observations. The combination of field survey data and four classification methods resulted in highly accurate classification outcomes that showed the distribution patterns of Sargassum spp. around Rottnest Island during the austral spring season (October 2013). Overall, the minimum distance and Mahalanobis classifiers yielded the highest overall accuracy rates of 98.32% (kappa coefficient, κ = 0.96) and 98.30% (κ = 0.96), respectively. The K-means classification method gave the lowest accuracy percentage of 42.50% (κ = 0.22). Thus, the primary results of this study provide useful baseline information that is necessary for marine-conservation strategic planning and the sustainable utilization of brown macroalgae resources around the Western Australian coast.

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