2012 Fiscal Year Final Research Report
Ecosystem development and mechanism for sustaining biological diversity at lakes in rocky area of Antarctic
| Project/Area Number |
23651006
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | The University of Tokyo |
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Principal Investigator |
YAMAMURO Masumi 東京大学, 大学院・新領域創成科学研究科, 教授 (80344208)
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| Co-Investigator(Renkei-kenkyūsha) |
KUDO Sakae 国立極地研究所, 准教授 (40221931)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 極域環境監視 |
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| Research Abstract |
We examined the controlling factors on the development of microbial mat constituted with micro algae, cyanobacteria and moss, on the bottoms of oligotrophic lakes at rocky area of Soya Coast, Antarctic. Nitrogen stable isotope ratios of the mats suggested that nitrogen was supplied through nitrogen fixation by cyanobacteria to the microbial mat communities.Carbon stable isotope ratio of the mats suggested that photosynthetic activity decreased as the amount of light (PAR: Photosynthetically active radiation, UV: Ultra Violet) increased. The amount of both PAR and UV showed negative correlation with the drainage areas, suggesting that the dissolved materials supplied from drainage basin decreased the amount of light.
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[Presentation] Nutrients in sediments as driving force behind Antarctic lake ecosystems2012
Author(s)
Tanabe, Y., Hori, M., Uchida, M., Osono,T., Yamamuro, M., Kudoh, S.
Organizer
Polar Ecology Conference 2012
Place of Presentation
Czech Republic
Year and Date
2012-10-04
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