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タイトル: Phenology and morphology of the marine phanerogam Zostera caulescens Miki in Funakoshi Bay, northeast Honshu Island, Japan
著者: Shabaka, Soha
Komatsu, Teruhisa
キーワード: morphology
shoot dynamics
Zostera caulescens
発行日: 2010年8月20日
出版者: International Coastal Research Center, Atmosphere and Ocean Research Institute, the University of Tokyo
掲載誌情報: Coastal marine science. Vol. 34, No. 1, 2010, pp. 13-23
抄録: Zostera caulescens Miki is distributed around the Honshu Island, Japan, and a threatened species. Its population in Funakoshi Bay on the Sanriku Coast, northeast Honshu Island, is known to be the world's longest seagrass. However, its ecological and morphological characteristics have not been well studied. Therefore, bimonthly sampling of its flowering and vegetative shoots together with its rhizomes and roots was conducted along a depth gradient in Funakoshi Bay to examine its phenology and morphology including flower structures. Zostera caulescens in Funakoshi Bay showed different morphology from those in central Honshu Island and the Korean Peninsula. The Leaf apex shapes were characterized by two forms: mucronate and emarginate. This study discovered that of flowering shoots was changed from an emarginate form in summer to a mucronate one in autumn and winter. Biomass and leaf area index (LAI) of flowering shoot showed higher values in summer and lower values in autumn and winter. Shoot density, biomass and LAI of flowering and vegetative shoots were lower at deeper stations. Number of flowers per flowering shoot and number of fruits per flower in Funakoshi Bay was less than in central Honshu Island. New recruits of vegetative and immature flowering shoots were observed in winter.
URI: http://hdl.handle.net/2261/51645
ISSN: 13493000
出現カテゴリ:Coastal Marine Science
Coastal Marine Science


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