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

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Author(s)

    • NAGAHAMA Yumi
    • Department of Civil and Environmental Engineering, Tohoku University, Japan
    • NOMURA Munehiro
    • Department of Civil and Environmental Engineering, Tohoku University, Japan
    • SHIN Woo-seok
    • Department of Civil and Environmental Engineering, Tohoku University, Japan
    • NISHIMURA Osamu
    • Department of Civil and Environmental Engineering, Tohoku University, Japan

Abstract

Some researchers suggest that <I>Zostera japonica</I> 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 <I>Z. japonica</I>. However, these methods cannot be used yet because the characteristics of stable isotope ratios and fatty acid structures in <I>Z. japonica</I> are not clear. The objectives of this research are the clarification of the characteristics of stable isotope ratio and fatty acid structure in <I>Z. japonica</I>. Moreover, the availability as tracer of organic matter origin was explored; and the characteristics of stable isotope and fatty acid structure of <I>Z. japonica</I> were compared with other primary producers in tidal flat. Results showed that <I>Z. japonica</I> contained large amounts of 18:2n6 and 18:3n3 and they were used as biomarkers of other seagrass-derived organic matter. In addition, <I>Z. japonica</I> 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.

Journal

  • Journal of Water and Environment Technology

    Journal of Water and Environment Technology 9(2), 101-109, 2011

    Japan Society on Water Environment

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