Question of a nutrient effect on the bio-optical properties of phytoplankton

John Marra; Robert R. Bidigare

doi:10.1117/12.190058

26 October 1994 Question of a nutrient effect on the bio-optical properties of phytoplankton

John Marra, Robert R. Bidigare

Proceedings Volume 2258, Ocean Optics XII; (1994) https://doi.org/10.1117/12.190058
Event: Ocean Optics XII, 1994, Bergen, Norway

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.

Citation Download Citation

John Marra and Robert R. Bidigare "Question of a nutrient effect on the bio-optical properties of phytoplankton", Proc. SPIE 2258, Ocean Optics XII, (26 October 1994); https://doi.org/10.1117/12.190058

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