Journal of Oceanography

, Volume 54, Issue 5, pp 517–526 | Cite as

Chlorophyll-specific absorption coefficients and pigments of phytoplankton off Sanriku, northwestern North Pacific

  • Koji Suzuki
  • Motoaki Kishino
  • Kousei Sasaoka
  • Sei-Ichi Saitoh
  • Toshiro Saino
Article

Abstract

The variety in shape and magnitude of thein 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 ofa ph * (440) anda ph * (650) were found with relatively high concentrations of chlorophyllb (a green algae marker). At stations located in the Oyashio water (cold streamer),a ph * (440) values were lower and fucoxanthin (a diatom marker) concentrations were higher, compared to the other stations. The peak in the absorption spectra at the Oyashio stations was shifted toward shorter wavelengths, which was probably due to the presence of phaeopigments. In a Kuroshio warm-core ring, the magnitude ofa ph * (440) was in between those at the warm-streamer and Oyashio stations, and the diagnostic pigment was peridinin (a dinoflagellate marker). These findings indicated that major differences in phytoplankton absorption spectra of each water mass were a result of differences in the phytoplankton pigment composition of each water mass, which was probably related to the phytoplankton community.

Keywords

Phytoplankton absorption phytoplankton pigments off Sanriku North Pacific 

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Copyright information

© The Oceanographic Society of Japan 1998

Authors and Affiliations

  • Koji Suzuki
    • 1
  • Motoaki Kishino
    • 2
  • Kousei Sasaoka
    • 3
  • Sei-Ichi Saitoh
    • 3
  • Toshiro Saino
    • 1
  1. 1.Institute for Hydrospheric-Atmospheric SciencesNagoya UniversityNagoyaJapan
  2. 2.The Institute of Physical and Chemical ResearchWako, SaitamaJapan
  3. 3.Faculty of FisheriesHokkaido UniversityHakodate, HokkaidoJapan

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