2003 Fiscal Year Final Research Report Summary
Biodiversity and evolution of terrestrial flora in Antarctica.
| Project/Area Number |
12640691
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
系統・分類
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| Research Institution | National Institute of Polar Research |
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Principal Investigator |
IMURA Satoshi National Institute of Polar Research, Associate Professor, 研究系, 助教授 (90221788)
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| Co-Investigator(Kenkyū-buntansha) |
KANDA Hiroshi National Institute of Polar Research, Professor, 資料系, 教授 (70099935)
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| Project Period (FY) |
2000 – 2003
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| Keywords | lakes / mosses / Antarctica / molecular systematics / DNA / sediments / geohistory / diversity |
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| Research Abstract |
Growth environment, geohistory, morphological diversity, and molecular systematics were investigated on mosses in Syowa station area, Antarctica, especially on aquatic mosses at the bottom of lakes.
Water temperature at the lake bottom was +7℃ in austral summer, and +7℃ even in winter. Because of little snow accumulation in this region, the sun light easily permeate through surface ice cover to plants growing at the lake bottom, strongly enough for photosynthesis between October to April. Salinity of lake water was variable among lakes, and nutrients are quite low. Flora in Antarctic lakes was characterized by little amount of plankton and rich benthic vegetation a the bottom. Most part of the lake bottom was covered with population of filamentous cyanobacteria and some green algae and diatoms. Sediments of these plants and sands were analyzed to clarify the age of lakes and history of lake environments.
Molecular systematic study was carried out on two aquatic mosses, Bryum sp. and Leptobryum sp. Aquatic Bryum was thought to originated from terrestrial B.pseudotriquetrum, but terrestrial B.pseudotriquetrum itself must be changed its name to B.pallescens distributing in Antarctic peninsula and out of Antarctica. Genetic diversity of aquatic Leptobryum was included in wide diversity range of L.pyriforme known as weedy species in all around the world.
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Research Products
(17 results)
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[Publications] Imura, S., Bando, T., Seto, K., Ohtani, S., Kudoh, S., Kanda, H.: "Distribution of aquatic mosses in the Soya Coast region, East Antarctica."Polar Bioscience. 16. 1-10 (2003)
Description
「研究成果報告書概要(和文)」より
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[Publications] Kudoh, S., Tsuchiya, Y., Ayukawa, E., Imura, S., Kanda, H.: "Ecological studies of aquatic moss pillars in Antarctic lakes.1.Macro structure and carbon, nitrogen and chlorophyll a contents."Polar Bioscience. 16. 11-22 (2003)
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「研究成果報告書概要(和文)」より
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[Publications] Kanda, H., Ohtani, S., Imura, S.: "Beyer, L., Bolter, M.(eds.)Ecological studies 154:Geoecology of Antarctic Ice-Free Coastal Landscapes, pp.249-264.Plant communities at Dronning Maud Land."Springer-Verlag, Heiderberg.. 427 (2002)
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「研究成果報告書概要(和文)」より
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[Publications] Imura, S., Bando, T., Seto, K., Ohtani, S., Kudoh, S., Kanda, H.: "Distribution of aquatic mosses in the Soya Coast region, East Antarctica."Polar Bioscience. 16. 1-10 (2003)
Description
「研究成果報告書概要(欧文)」より
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[Publications] Kudoh, S., Tsuchiya, Y., Ayukawa, E., Imura, S., Kanda, H.: "Ecological studies of aquatic moss pillars in Antarctic lakes. 1. Macro structure and carbon, nitrogen and chlorophyll a contents."Polar Bioscience. 16. 11-22 (2003)
Description
「研究成果報告書概要(欧文)」より
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