Chlorophyll-Specific Absorption Coefficients and Pigments of Phytoplankton off Sanriku, Northwestern North Pacific

摘要

The variety in shape and magnitude of the in vivo chlorophyll-specific absorption spectra of phytoplankton was investigated in relation to differences in pigment composition off Sanriku, northwestern North Pacific. Site-to-site variations of the absorption coefficients, a~*_ph(λ), and pigment composition were clearly observed. At warm-streamer stations, higher values of a~*_ph (440) and a~*_ph (650) were found with relatively high concentrations of chlorophyll b (a green algae marker). At stations located in the Oyashio water (cold streamer), a~*_ph (440) values were lower and fucoxanthin (a diatom marker) concentra- tions were higher, compared to the other stations.