2005 Fiscal Year Final Research Report Summary
Impact on the biological diversity in polar lakes affected by global environmental changes.
| Project/Area Number |
14380258
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
環境影響評価(含放射線生物学)
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| Research Institution | National Institute of Polar Research, Arctic Environment Research Center |
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Principal Investigator |
KANDA Hiroshi National Institute of Polar Research, Arctic Environment Research Center, Professor, 北極観測センター, 教授 (70099935)
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| Co-Investigator(Kenkyū-buntansha) |
IMURA Satoshi National Institute of Polar Research, Division for Research and Education, Associate Professor, 研究教育系, 助教授 (90221788)
KUDOH Sakae National Institute of Polar Research, Division for Research and Education, Associate Professor, 研究教育系, 助教授 (40221931)
NAGANUMA Takeshi Hiroshima University, Graduate school of Biosphere Science, Associate Professor, 大学院生物圈科学研究科, 助教授 (70263738)
INOUE Genki (松本 源喜) Otsuma Women's University, Faculty of Social Information, Professor, 社会情報学部, 教授 (80245357)
SETO Kouji Shimane University, Research Center for Coastal Lagoon Environments, Associate Professor, 汽水域研究センター, 助教授 (60252897)
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| Project Period (FY) |
2002 – 2005
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| Keywords | lake / lake sediment / diversity / material cycle / cyanobacteria / moss / microbial community / environmental change |
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| Research Abstract |
To know the influences to the biological features in the polar lakes by the global environmental changes during 2002-2005, water sample, lake bottom vegetation, sediment core samples and environmental data given on the lake research project were investigated.
Based on the water temperature, salinity, dissolved oxygen and so on, lakes located at the adjacent area of Syowa Station, East Antarctica were categorized to four types (Type 1-4). Type 1 : melt water from glacier flows directly into lakes, Type 2 : melt water flows into lakes through stream, Type 3 : melt water from snow beds flows into lakes and Type 4 : lake water originates from sea water. These lake types also correspond with the biological features. Organic component such as total organic carbon (TOC), total nitrogen (TN), hydrocarbon, fatty acids and sterols in aquatic moss vegetation and sediment core from lake bottoms from the Syowa Station area were studied to clarify their features in relation to paleo-environmental change.
Aquatic mosses (Bryum, Leptobryum) have been recently known to form a unique structure called "moss pillar", in association with algae including cyanobacteria. We have studied a moss pillar from the lake in Skarvsnes by fatty acid analysis. Neutral lipid fatty acid (NLFA) profiles were largely groped exterior and interior parts and locally associated with different bacterial groups in the lower-interior and lower-exterior parts. Dry weight, carbon, nitrogen and chlorophyll distributions in the moss pillar took heterogeneous pattern, but they were largely centered at apical parts. It is suggested that growth of moss pillar occurred extensively at the apical part. The age was estimated ca.250 years at ca.20 cm below the apical top by the AMS method.
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[Journal Article] Environmental changes in Syowa Stationarea of Antarctica during the last 2300 years inferred from organic components in lake sediment cores.2006
Author(s)
Matsumoto, G.I., Komori, K., Enomoto, A., Imura, S., Takemura, T., Ohyama, Y., Kanda, H.
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Journal Title
Polar Biology 19
Pages: 51-62
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Depth distribution of euryhaline halophilic bacteria in Suribati Ike, a meromictic lake in East Antarctica.2005
Author(s)
Naganuma, T., Hua, P.N., Okamoto, T., Ban, S., Imura, S., Kanda, H.
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Journal Title
Polar.Biol. 28
Pages: 964-870
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Psycbrobacter vallis sp. nov. and Psychrobacter aquaticus sp. nov., from Antarctica.2005
Author(s)
Shivaji, S., Reddy, G.S.N., Suresh, K., Gupta, P., Chintalapati, S., Schumann, P., Stackebrandt, B., Matsumoto, G.I.
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Journal Title
International Journal of Systematic and Evolutionary Microbiology 55(2)
Pages: 757-762
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Biological investigations of the Antarctic ice sheet, review, problems and projects.2004
Author(s)
Abyzov, S.S., Fukuchi, M., Imura S., Kanda, H., Mitskevich, I., Naganuma, T., Poglazova, M., Savatyugin, L., Ivanov, M.
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Journal Title
Polar Bioscience 17
Pages: 106-116
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Use of different methods for discovery of ice-entrapped microorganisms in ancient layers of the Antarctic glacier.2004
Author(s)
Abyzov, S.S., Hoover R.B., Imura, S., Mitskevich, I.N., Naganuma, T., Poglazova, M.N., Ivanov, M.V.
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Journal Title
Advances in Space Research 33
Pages: 1222-1230
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Biogeochemical features of lipids in endolithic microbial communities in the Ross Desert (McMurdo Dry Valleys). Antarctica.2004
Author(s)
Matsumoto, G.I., Nienow, J.A., Friedmann, E.I., Sekiya, E., Ocampo-Friedmann, R.
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Journal Title
Cellular and molecular biology (Noisy-le-Grand, France), 50(5)
Pages: 591-604
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Comparative phylogenetic analyses of Halomonas variabilis and related organisms based on 16s rRNA, gyrB and ectBC gene sequences.2004
Author(s)
Okamoto, T., Maruyama, A., Imura, S., Takeyama, H., Naganuma, T.
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Journal Title
Appl.Microbiol. 27
Pages: 323-333
Description
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[Journal Article] Distribution of aquatic mosses in the Soya Coast region. East Antarctica.2003
Author(s)
Imura, S., Bando, S., Seto, K., Ohtani, S., Kudoh, S., Kanda, H.
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Journal Title
Polar Bioscience 16
Pages: 1-10
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Ecological studies on aquatic moss pillars in Antarctic lakes. 1. Macro structure and carbon, nitrogen and chlorophyll a contents.2003
Author(s)
Kudoh, S., Tsuchiya, Y, Ayukawa, E., Imura, S., Kanda, H.
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Journal Title
Polar Bioscience 16
Pages: 11-22
Description
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