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Proceedings Paper

Spectral response of the coral rubble, living corals, and dead corals: study case on the Spermonde Archipelago, Indonesia
Author(s): Nurjannah Nurdin; Teruhisa Komatsu; Hiroya Yamano; Gulam Arafat; Chair Rani; M. Akbar AS
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Paper Abstract

Coral reefs play important ecological services such as providing foods, biodiversity, nutrient recycling etc. for human society. On the other hand, they are threatened by human impacts such as illegal fishing and environmental changes such as rises of sea water temperature and sea level due to global warming. Thus, it is very important to monitor dynamic spatial distributions of coral reefs and related habitats such as coral rubble, dead coral, bleached corals, seagrass, etc. Hyperspectral data, in particular, offer high potential for characterizing and mapping coral reefs because of their capability to identify individual reef components based on their detailed spectral response. We studied the optical properties by measuring in situ spectra of living corals, dead coral and coral rubble covered with algae. Study site was selected in Spermonde archipelago, South Sulawesi, Indonesia because this area is included in the highest diversity of corals in the world named as Coral Triangle, which is recognized as the global centre of marine biodiversity and a global priority for conservation. Correlation analysis and cluster analysis support that there are distinct differences in reflectance spectra among categories. Common spectral characteristic of living corals, dead corals and coral rubble covered with algae was a reflectance minimum at 674 nm. Healthy corals, dead coral covered with algae and coral rubble covered with algae showed high similarity of spectral reflectance. It is estimated that this is due to photsynthetic pigments.

Paper Details

Date Published: 11 December 2012
PDF: 10 pages
Proc. SPIE 8525, Remote Sensing of the Marine Environment II, 85251A (11 December 2012); doi: 10.1117/12.999306
Show Author Affiliations
Nurjannah Nurdin, Hasanuddin Univ. (Indonesia)
Teruhisa Komatsu, The Univ. of Tokyo (Japan)
Japan Science and Technology Agency (Japan)
Hiroya Yamano, National Institute for Environmental Studies (Japan)
Gulam Arafat, Hasanuddin Univ. (Indonesia)
Chair Rani, Hasanuddin Univ. (Indonesia)
M. Akbar AS, SEAMEO Biotrop (Indonesia)

Published in SPIE Proceedings Vol. 8525:
Remote Sensing of the Marine Environment II
Robert J. Frouin; Naoto Ebuchi; Delu Pan; Toshiro Saino, Editor(s)

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