Identification of invasive alien species <i>Spartina alterniflora</i> in Japan using morphological characteristics as compared with native species <i>Phragmites australis</i>

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  • KIMURA Taeko
    Graduate School of Bioresource, Mie University The committee for the preservation of the natural environment, the Japanese Association of Benthology
  • HANAI Takaaki
    Japanese Network for Prevention Spartinas spreading
  • KIMURA Shoichi
    Graduate School of Bioresource, Mie University
  • FUJIOKA Eriko
    Shiokawa Tidalflat Preservation Association

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  • 特定外来生物ヒガタアシの国内侵入とヨシ（在来種）との識別点
  • トクテイ ガイライ セイブツ ヒガタアシ ノ コクナイ シンニュウ ト ヨシ(ザイライシュ)ト ノ シキベツテン

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<p>The smooth cordgrass Spartina alterniflora, native to the east coast of North America and the Gulf of Mexico, was first found from Japanese tidal flats in 2008. The species has been reported from Aichi and Kumamoto Prefectures where it settles on tidal flats lower than native reed grass Phragmites australis and other saltmarsh plants. In 2014, the Ministry of Environment in Japan designated all Spartina species as the invasive alien species. While S. alterniflora has been exterminated extensively by local governments, it still has invaded other tidal flats in Japan. We review the situation of S. alterniflora in Japan with the comparison of morphological characteristics of S. alterniflora and P. australis native to Japan for early detection on Japanese tidal flats.</p>

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