Ecological aspects of carbon and nitrogen isotope ratios of cyanobacteria

DOI Web Site 被引用文献6件 参考文献71件 オープンアクセス
  • Wada Eitaro
    Environmental Biogeochemical Cycle Research Program, Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
  • Ohki Kaori
    Department of Marine Bioscience, Fukui Prefectural University
  • Yoshikawa Shinya
    Department of Marine Bioscience, Fukui Prefectural University
  • Parker Patrick L.
    Marine Science Institute, The University of Texas
  • Baalen Chase Van
    Marine Science Institute, The University of Texas
  • Matsumoto Genki I.
    Department of Environmental Studies, School of Social Information Studies, Otsuma Women's University
  • Aita Maki Noguchi
    Environmental Biogeochemical Cycle Research Program, Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
  • Saino Toshiro
    Environmental Biogeochemical Cycle Research Program, Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)

書誌事項

公開日
2012
DOI
  • 10.3800/pbr.7.135
公開者
日本プランクトン学会、日本ベントス学会

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説明

Variation in the δ13C of a cultured marine cyanobacterium (Agmenellum quadruplicatum, strain PR-6) is described with an emphasis on the relationships between growth rate, pCO2, and δ13C. An average nitrogen isotope fractionation of 1.0017 was obtained during N2 fixation by cultured marine cyanobacteria. This result suggests that nitrogen supply via N2 fixation may be characterized by a low δ15N, down to ca. -2‰ in marine environments, where the average δ15N is higher (at ca. 6‰) for major inorganic nitrogenous compounds such as nitrate. The natural abundances of nitrogen and carbon isotope ratios for cyanobacteria collected from the McMurdo Dry Valleys, Antarctica, were characterized by extremely low δ15N and widely ranging δ13C. Summarizing these and other data obtained, an isotopic map of cyanobacteria and other plankton in aquatic ecosystems was constructed and the ecological implications are discussed. Our results suggest that the δ13C of marine phytoplankton is positively correlated with sea surface temperature and can be a useful parameter for estimating in situ growth rates in the open ocean.

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