Development of molecular level isotope techniques to analyze ecosystems
Project/Area Number |
25291101
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Partial Multi-year Fund |
Section | 一般 |
Research Field |
Ecology/Environment
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Research Institution | Research Institute for Humanity and Nature (2014-2015) Kyoto University (2013) |
Principal Investigator |
Tayasu Ichiro 総合地球環境学研究所, 研究高度化支援センター, 教授 (80353449)
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Co-Investigator(Kenkyū-buntansha) |
KONDOH Michio 龍谷大学, 理工学部, 教授 (30388160)
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Co-Investigator(Renkei-kenkyūsha) |
OHKOUCHI Naohiko 国立研究開発法人海洋研究開発機構, 生物地球化学研究分野, 分野長 (00281832)
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Project Period (FY) |
2013-04-01 – 2016-03-31
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Project Status |
Completed (Fiscal Year 2015)
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Budget Amount *help |
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2015: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2014: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2013: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000)
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Keywords | 安定同位体 / 生態系 / アミノ酸 / 生物標本 / 食物網 |
Outline of Final Research Achievements |
In this study, we tested a possibility to use molecular level isotope techniques and other isotopes together with conventional isotopes, namely carbon and nitrogen isotope ratios. It had been shown that trophic position of an organism can be estimated using nitrogen isotope ratios of phenylalanine and glutamine in either terrestrial or aquatic ecosystem. However, the equation to estimate trophic position requires an assumption of either terrestrial or aquatic primary production. In this study, we revealed that the method is also available to an organism in riverine systems, applying a mixing model using nitrogen isotope ratios of phenylalanine and glutamine. We showed the utility to use sulfur isotope ratios in separating terrestrial and marine derived materials, oxygen isotope ratios of organic matter in estimating the origin of the materials in relation to water cycling, and carbon-14 concentrations in estimating carbon source.
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Report
(4 results)
Research Products
(85 results)
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[Journal Article] Terrestrial-;aquatic linkage in stream food webs along a forest chronosequence: multi-isotopic evidence2016
Author(s)
Ishikawa N. F., H. Togashi, Y. Kato, M. Yoshimura, Y. Kohmatsu, C. Yoshimizu, N.O. Ogawa, N. Ohte, N. Tokuchi, N. Ohkouchi, I. Tayasu.
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Journal Title
Ecology
Volume: -
Issue: 5
Pages: 1146-1158
DOI
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Peer Reviewed / Open Access
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[Journal Article] Seasonal shifts in the contributions of the Changjiang River and the Kuroshio Current to nitrate dynamics in the continental shelf of the northern East China Sea based on a nitrate dual isotopic composition approach2014
Author(s)
Umezawa Y., Yamaguchi, A., Ishizaka, J., Hasegawa, T., Yoshimizu, C., Tayasu, I., Yoshimur, H., Morii, Y., Aoshima, T., and Yamawaki, N.
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Journal Title
Biogeosciences
Volume: 11
Issue: 4
Pages: 1297-1317
DOI
NAID
Related Report
Peer Reviewed
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[Presentation] 溶存物質および生物の多元素同位体組成が示す生態系情報:東北太平洋岸地域の例2016
Author(s)
陀安一郎, 由水千景, 松林順, 加藤義和, 長田穣, 奥田昇, 斉藤有, 申ギチョル, 中野孝教, 神松幸弘, 近藤倫生, 冨樫博幸, 天野洋典, 栗田豊
Organizer
第63回日本生態学会仙台大会
Place of Presentation
仙台国際センター,仙台
Year and Date
2016-03-24
Related Report
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[Presentation] Ecological Complexity and Community Stability2015
Author(s)
Michio Kondoh
Organizer
2015 Joint Meeting of The 5th China-Japan-Korea Colloquium on Mathematical Biology and The Japanese Society for Mathematical Biology
Place of Presentation
Ryoshin-kan Building, Imadegawa Campus, Doshisha University, Kyoto, Japan
Year and Date
2015-08-29
Related Report
Int'l Joint Research / Invited
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[Presentation] Terrestrial-aquatic linkage on stream food webs along a forest chronosequence: multi-isotopic evidence2015
Author(s)
Ishikawa, N.F., Togashi, H., Kato, Y., Yoshimura, M., Kohmatsu, Y., Yoshimizu, C., Ogawa, N.O., Ohkouchi, N., Ohte, N., Tokuchi, N. and Tayasu, I.
Organizer
第62回日本生態学会鹿児島大会
Place of Presentation
鹿児島大学,鹿児島
Year and Date
2015-03-19
Related Report
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[Presentation] The impact of land uses on benthic macroinvertebrate diversity in the coastal ecosystem of Lake Biwa, JAPAN2015
Author(s)
Yoichiro Sakai, Zin’ichi Karube, Jun-ya Shibata, Tomohiro Takeyama, Ichiro Tayasu, Shigeo Yachi, Shin-icni Nakano, Noboru Okuda “The impact of land uses on benthic macroinvertebrate diversity in the coastal ecosystem of Lake Biwa, JAPAN
Organizer
2015 ASLO Aquatic Sciences Meeting
Place of Presentation
Granada, Spain
Year and Date
2015-02-22 – 2015-02-27
Related Report
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[Presentation] Identification of nitrate sources and their contribution to phytoplankton growth at the east china sea, based on multiple isotopes analyses2014
Author(s)
Ryu Nozaki, Yu Umezawa, AkiraYamaguchi, Shigenobu Takeda, Kou Nishiuchi, Shin-ichiro Oka, Chikage Yoshimizu, Ichiro Tayasu, Hisao Kanehara, Takashi Aoshima
Organizer
ASLO ocean Science Meeting
Place of Presentation
Hawaii
Related Report
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[Presentation] Food source and inhabiting environment of the larvae of the ghost shrimp Nihonotrypaea harmandi, estimated based on stable isotopes analysis of bulk and amino acids2014
Author(s)
Yu Umezawa, Akio Tamaki, Koji Kiyama, Daisuke Hiramatsu, Rei Somiya, Toshikazu Suzuki, Haruka Matsuo, Kazumaro Okamura, Chikage Yoshimizu, Ichiro Tayasu
Organizer
ASLO ocean Science Meeting
Place of Presentation
Hawaii
Related Report
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