第6回極域科学シンポジウム[OB] 極域生物圏11月16日（月）　国立極地研究所１階交流アトリウ

Fumino Maruo

Satoshi Imura

丸尾 文乃

伊村 智

National Institute of Polar Research Repository

  異なる生育地におけるシモフリゴケのフェノロジー特性  丸尾文乃 1、伊村智 1,2 1総合研究大学院大学 2国立極地研究所  A comparative study of the phenology of Racomitrium lanuginosum in two distinct habitats  Fumino Maruo1 and Satoshi Imura1,2 1SOKENDAI 2National Institute of Polar Research    Population of flowering plants located at the margins of species’ distribution often display reduced sexual reproduction and an increased reliance on asexual reproduction.  This trend has been confirmed also in the bryophyte.  One of the hypothesis to explain this phenomenon is the declining sexual reproduction at the margin of species’ distribution in connection with environmental depression.  To clarify the effect of environmental depression on sexual reproduction, we investigated the phenology of Racomitrium lanuginosum (Hedw.) Brid., dioecious moss, in two distinct habitats, snow free (Mt. Mihara, Izu Oshima, about 750 m alt.) and about 4.5 months snow covered sites (Mt. Fuji, about 2200 m alt.).   30 shoots of this species were sampled every 2 weeks throughout the growing season in 2014 in each sites.  After sampling, shoots were categorized into three types, as male (with male inflorescences), female (with female inflorescences or sporophytes) and vegetative (without sexual organs).  Phenological parameters on sexual reproduction, such as inflorescence formation, gametangium development, sporophyte development were surveyed.  Effect of shortened growing season by snow cover on each phenological parameters will be discussed by comparison of the results from two habitats.    

A comparative study of the phenology of Racomitrium lanuginosum in two distinct habitats

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A comparative study of the phenology of Racomitrium lanuginosum in two distinct habitats

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