Characterization of the Carbon Stable Isotope Ratio and Fatty Acid Structure of Zostera japonica in Coastal Areas

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概要

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• Some researchers suggest that Zostera japonica has important roles as primary producers in tidal flat ecosystem. Recently, it is known that the methods involving tracers in stable isotope ratio analysis and fatty acid structures stand up to clarify the origin of organic matter. If these methods can be used, it would be possible to clarify the role of organic matter derived from Z. japonica. However, these methods cannot be used yet because the characteristics of stable isotope ratios and fatty acid structures in Z. japonica are not clear. The objectives of this research are the clarification of the characteristics of stable isotope ratio and fatty acid structure in Z. japonica. Moreover, the availability as tracer of organic matter origin was explored; and the characteristics of stable isotope and fatty acid structure of Z. japonica were compared with other primary producers in tidal flat. Results showed that Z. japonica contained large amounts of 18:2n6 and 18:3n3 and they were used as biomarkers of other seagrass-derived organic matter. In addition, Z. japonica also contained LCFAs, which is used as biomarker of terrestrial plants. These results show that LCFAs are not the only biomarkers that can be used to trace the organic matter in terrestrial plants.

著者

• Nishimura Osamu

  Department Of Earth Science And Astronomy College Of Arts And Sciences The University Of Tokyo

• SHIN Woo-seok

  Department of Civil and Environmental Engineering, Tohoku University, Japan

• NAGAHAMA Yumi

  Department of Civil and Environmental Engineering, Tohoku University, Japan

• NOMURA Munehiro

  Department of Civil and Environmental Engineering, Tohoku University, Japan

• FUJIBAYASHI Megumu

  Department of Civil and Environmental Engineering, Tohoku University, Japan

• NISHIMURA Osamu

  Department of Civil and Environmental Engineering, Tohoku University, Japan

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