Species diversity of the genus <i>Echinochloa</i> (Poaceae), native to eastern Australia

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  • Tanesaka Eiji
    Department of Agricultural Science and Technology, Faculty of Agriculture, Kinki University
  • Ohno Tomoko
    Graduate School of Life and Environmental Science, Osaka Prefecture University
  • Yamaguchi Hirofumi
    Graduate School of Life and Environmental Science, Osaka Prefecture University

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Other Title
  • 東部オーストラリアに自生するヒエ属植物(イネ科)の種多様性
  • Species diversity of the genus Echinochloa (Poaceae), native to eastern Australia : a focus on their habitat and the threat of exotic species
  • 特にその生息地と外来種の脅威について
  • a focus on their habitat and the threat of exotic species

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Abstract

The natural habitat of the Echinochloa species growing in eastern Australia was investigated in May 2008. In this survey, four annual native species, E. dietrichiana, E. inundata, E. telmatophila, and E. turneriana, and three exotic species, E. colona, E. crus-galli, and E. polystachya, were observed. The native species clearly have separate habitats: permanent stagnant pools for E. dietrichiana, inland floodplains for E. inundata, in or beside streams for E. telmatophila, and inland watercourses for E. turneriana. While the habitat of the exotic species greatly overlap that of the natives, especially perennial E. polystachya, which forms monospecific stands in stagnant pools and in or beside flood rivers due to its remarkable productivity, and E. crus-galli, which has the potential to adapt to several moisture conditions. We predict that the invasive exotic Echinochloa species will become more and more threatening causing serious damage to the native species within the same genus.

Journal

  • Journal of Crop Research

    Journal of Crop Research 55 (0), 13-17, 2010

    The Society of Crop Science and Breeding in Kinki, Japan

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