NDLI: Bio-optical modeling of photosynthetic pigments in corals

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Bio-optical modeling of photosynthetic pigments in corals

Content Provider	Springer Nature Link
Author	Hochberg, Eric J. Apprill, Amy M. Atkinson, Marlin J. Bidigare, Robert R.
Copyright Year	2005
Abstract	The spectral reflectance of coral is inherently related to the amounts of photosynthetic pigments present in the zooxanthellae. There are no studies, however, showing that the suite of major photosynthetic pigments can be predicted from optical reflectance spectra. In this study, we measured cm-scale in vivo and in situ spectral reflectance for several colonies of the massive corals Porites lobata and Porites lutea, two colonies of the branching coral Porites compressa, and one colony of the encrusting coral Montipora flabellata in Kaneohe Bay, Oahu, Hawaii. For each reflectance spectrum, we collected a tissue sample and utilized high-performance liquid chromatography to quantify six major photosynthetic pigments, located in the zooxanthellae. We used multivariate multiple regression analysis with cross-validation to build and test an empirical linear model for predicting pigment concentrations from optical reflectance spectra. The model accurately predicted concentrations of chlorophyll a, chlorophyll c 2, peridinin, diadinoxanthin, diatoxanthin and β-carotene, with correlation coefficients of 0.997, 0.941, 0.995, 0.996, 0.980 and 0.984, respectively. The relationship between predicted and actual concentrations was 1:1 for each pigment, except chlorophyll c 2. This simple empirical model demonstrates the potential for routine, rapid, non-invasive monitoring of coral-zooxanthellae status, and ultimately for remote sensing of reef biogeochemical processes.
Starting Page	99
Ending Page	109
Page Count	11
File Format	PDF
ISSN	07224028
Journal	Coral Reefs
Volume Number	25
Issue Number	1
e-ISSN	14320975
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-12-20
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Corals Pigments Reflectance High-performance liquid chromatography Bio-optical modeling
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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