2009 Fiscal Year Final Research Report
Study of ecosystem structure and carbon turnover - Elucidation of carbon cycling in ecosystems using radiocarbon analysis
| Project/Area Number |
19681002
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Kyoto University |
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Principal Investigator |
TAYASU Ichiro Kyoto University, 生態学研究センター, 准教授 (80353449)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 生態系 / 食物網構造 / 放射性炭素 / 炭素循環 / 時間軸 / 溶存無機炭素 / 溶存有機炭素 / 安定同位体 |
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| Research Abstract |
During atmospheric nuclear weapon testing, large amounts of ^<14>CO_2 were produced in the atmosphere. Since the end of atmospheric testing after the nuclear test ban treaty in 1963, ^<14>C concentrations from nuclear tests in the atmosphere have declined. Recent photosynthetic products have A ^<14>C values equal to contemporary atmospheric CO_2. The present study has shown that this unique trend can be used to study turnover of carbon through food webs both in aquatic and terrestrial ecosystems.
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[Journal Article] Nitrogen stable isotopic signatures of basal food items, primary consumers and omnivores in rivers with different levels of human impact.2009
Author(s)
Kohzu, A., Tavasu. I., Yoshimizu, C., Maruyama, A., Kohmatsu, Y., Hyodo, F., Onoda, Y., Igeta, A., Matsui, K, Nakano, T., Wada, E., Nagata, T., Takemon, Y.
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Journal Title
Ecological Research 24
Pages: 127-136
Peer Reviewed
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[Journal Article] Gradual enrichment of 15N with humification of diets in a belowground food web:relation between 15N and diet age determined using 14C.2008
Author(s)
Hyodo, F., Tayasu, I., Konate, S., Tondoh, J. E, Lavelle, P., Wada. E.
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Journal Title
Functional Ecology 22
Pages: 516-522
Peer Reviewed
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[Journal Article] Effects of vegetation switch and subsequent change in soil invertebrate composition on soil carbon accumulation patterns, revealed by radiocarbon concentrations.
Author(s)
Toyota, A., Tayasu、I., Fujimaki, R., Kaneko, N., Uchida, M., Shibata, Y., Hiura, T.
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Journal Title
Peer Reviewed
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[Journal Article] Carbon and nitrogen stable isotope ratios of macroinvertebrates in littoral zone of Lake Biwa as indicators of anthropogenic activities in the watershed. Ecological
Author(s)
Karube, Z., Sakai, Y., Takeyama, T., Okuda, N., Kohzu, A., Yoshimizu, C., Nagata, T., Tayasu, I.
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Journal Title
Peer Reviewed
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[Journal Article] Autochthonous origin of semi-labile dissolved organic carbon in a large monomictic lake:Carbon stable isotopic evidence.
Author(s)
Maki, K., Kim, C., Yoshimizu, C, Tayasu、I., Miyajima, T., Nagata, T.
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Journal Title
Peer Reviewed
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[Presentation] Comparison of soil carbon accumulation in conifer and broad leaf forests using radiocarbon measurements2009
Author(s)
Toyota, A., Tayasu, I., Fujimaki, R., Kaneko, N., Uchida, M., Shibata, Y, Hiura, T.
Organizer
2009 Intemational Radiocarbon Conference
Place of Presentation
The Big Island, Hawaii
Year and Date
2009-05-31
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[Book] Carbon sources and feeding habits of selected soil animals from an abandoned rice field chronosequence determined by carbon and nitrogen isotope ratios and natural carbon-14. In:Earth, Life, and Isotopes
Author(s)
Tayasu、I., Folgarait, RJ., Hyodo, F., Lavelle, P., Ohkouchi, N., Koba, K
Publisher
Kyoto University Press(in press)
