The emergence and establishment of seedlings of five coastal dune plants on the Enshunada Coast, Shizuoka Prefecture, central Japan

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  • OKA Kohei
    Graduate School of Environmental and Information Studies, Tokyo City University
  • YOSHIZAKI Shinji
    Graduate School of Environmental and Information Studies, Tokyo City University
  • KOBORI Hiromi
    Graduate School of Environmental and Information Studies, Tokyo City University

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Other Title
  • 静岡県遠州灘海岸における海浜植物5種の実生の発生と定着
  • シズオカケン エンシュウナダ カイガン ニ オケル カイヒン ショクブツ 5シュ ノ ミショウ ノ ハッセイ ト テイチャク

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Abstract

This study focused on the emergence and establishment of seedlings of five perennial plant species in order to investigate the seed propagation of coastal dune plants on the Enshu-nada coast, Shizuoka Prefecture, central Japan. Seedlings of Carex kobomugi had been successfully established on the tidal drifts in the back of the foredune. The tidal drifts had the effect of stimulating the growth of seedlings due to increased N-NO_3^- in the soil. Therefore, it was considered that Carex kobomugi had spread into the bare area through the tidal drifts. The establishment of seedlings differed among species at the foredune. Five coastal dune plants were divided into two groups: those with a low survival rate of seedlings (Carex kobomugi, Ixeris repens and Calystegia soldanella), and those with a high survival rate (Ischaemum anthephoroides and Fimbristylis sericea). In the former group, adult plants were established in each micro site of the foredune, irrespective of the densities of the emerged seedling and their survival. In the latter group, a large number of seedlings were observed at the micro sites, where adult plants were established. Moreover, the former group can spread through rhizome formation, but the latter group can not. It was concluded that Carex kobomugi, Ixeris repens and Calystegia soldanella mainly depended on vegetative propagation, while Ischaemum anthephoroides and Fimbristylis sericea mainly relied on seed propagation to maintain their population at the foredune. The role of seed propagation differed among coastal dune plants at the foredune, and the establishment of seedlings differed between the tidal drifts and the foredune.

Journal

  • Vegetation Science

    Vegetation Science 26 (1), 9-20, 2009

    The Society of Vegetation Science

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