Coral health monitoring: Linking coral colour and remote sensing techniques

Leiper, Ian A, Siebeck, Ulrike E, Marshall, Justin N and Phinn, Stuart R (2009) Coral health monitoring: Linking coral colour and remote sensing techniques. Canadian Journal of Remote Sensing, 35 3: 276-286.


Author Leiper, Ian A
Siebeck, Ulrike E
Marshall, Justin N
Phinn, Stuart R
Title Coral health monitoring: Linking coral colour and remote sensing techniques
Journal name Canadian Journal of Remote Sensing
ISSN 1712-7971
Publication date 2009-06
Year available 2009
Sub-type Article (original research)
Volume 35
Issue 3
Start page 276
End page 286
Total pages 11
Editor Joseph Buckley
Place of publication Canada
Publisher Canadian Aeronautics and Space Institute
Collection year 2010
Language eng
Subject C1
090905 Photogrammetry and Remote Sensing
970105 Expanding Knowledge in the Environmental Sciences
Abstract Percent of living coral cover is an indicator commonly used to assess reef status. This study tested whether Coral Health Chart scores could be used as a proxy for spectral reflectance, which would provide a basis for mapping living coral cover at a finer scale (colour) using remote sensing techniques. A total of 1264 spectral reflectance measurements were taken in situ from corals representing the colour scores on the Coral Health Chart at Heron Island, Great Barrier Reef, Australia. Spectral analyses of reflectance magnitude showed that living coral could be classified with 72.41% overall accuracy into three colour categories: bleached, medium, and dark coral. First- and second-order derivative analyses did not improve the accuracy of classifying coral spectra into colour categories. Spectral analyses using only coral spectra from the genus Acropora also failed to improve classification results significantly, consistent with suggestions that coral reflectance is independent of taxonomy at the genus level. The results of this study provide a foundation for using the Coral Health Chart as a proxy to map and monitor living coral condition using remote sensing techniques.
Keyword Great Barrier Reef
Spectral discrimination
Benthic communities
Pigmentation
Reflectance
Limits
Cover
Light
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Sun, 13 Dec 2009, 00:07:19 EST