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Proceedings Paper

Question of a nutrient effect on the bio-optical properties of phytoplankton
Author(s): John Marra; Robert R. Bidigare
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Paper Abstract

Although nutrient-limited growth of phytoplankton in the laboratory produces well-defined responses in the absorption coefficient, pigmentation, and quantum yield of photosynthesis, natural populations show only weak or inconclusive effects. Further analysis of the data from Biowatt-II, a seasonal study in the NW Atlantic in 1987, suggests two things. First, the phytoplankton absorption coefficient changes as a function of chlorophyll (alpha) , although photoprotectant accessory pigments are important in summer. Second, with the exception of one cruise, the data suggest that an estimated maximum quantum yield varies by less than 20%. Resolution of the issue of a nutrient effect may come with detailed measurements in a tropical region, in an ocean province without seasonally varying irradiance but having a strong seasonal signal in nutrient concentrations.

Paper Details

Date Published: 26 October 1994
PDF: 11 pages
Proc. SPIE 2258, Ocean Optics XII, (26 October 1994); doi: 10.1117/12.190058
Show Author Affiliations
John Marra, Columbia Univ. (United States)
Robert R. Bidigare, Univ. of Hawaii/Manoa (United States)

Published in SPIE Proceedings Vol. 2258:
Ocean Optics XII
Jules S. Jaffe, Editor(s)

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