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Proceedings Paper

In-vivo absorption properties of algal pigments
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Paper Abstract

Estimates of the in vivo specific absorption coefficients (m2 mg'; 400-750 nm, 2 nm intervals) for the major algal pigment groups (chlorophylls, carotenoids and phycobilins) are presented. "Unpackaged" absorption coefficients were initially obtained by measuring the absorption properties of pure pigment standards spectrophotometrically and "shifting" their absorption maxima to match in vivo positions. Two approaches for estimating the phytoplankton absorption coefficient (spectral reconstruction and spectral decomposition) are compared by linear regression analysis, incorporating concurrent measurements of particulate absorption and pigmentation performed in the Sargasso Sea. Results suggest that "pigment package" effects are minimal for natural assemblages of open-oceanic phytoplankton and that accessory pigments do not always co-vary with chlorophyll a over depth and time.

Paper Details

Date Published: 1 September 1990
PDF: 13 pages
Proc. SPIE 1302, Ocean Optics X, (1 September 1990);
Show Author Affiliations
Robert R. Bidigare, Texas A&M Univ. (United States)
Michael E. Ondrusek, Texas A&M Univ. (United States)
John H. Morrow, Biospherical Instruments (United States)
Dale A. Kiefer, Univ. of Southern California (United States)

Published in SPIE Proceedings Vol. 1302:
Ocean Optics X
Richard W. Spinrad, Editor(s)

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