Multistage evolution of Metazoa

2013 Fiscal Year Final Research Report

• Project/Area Number: 23340152
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Geology
• Research Institution: The University of Tokyo
• Principal Investigator: KOMIYA Tsuyoshi 東京大学, 総合文化研究科, 准教授 (30361786)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Keywords: エディアカラ紀 / カンブリア爆発 / 後生動物出現 / 生命進化 / 古環境解読 / 掘削 / 多元素・多同位体分析

Research Abstract

We obtained chemostratigraphies of C, O, Sr, Fe and Ca isotopes and Fe, Mn, REE and P contents of carbonates, Mo isotopes of black shales and C and N of organic matter from the Ediacaran to the Early Cambrian to estimate primary productivity, continental influx, temperature, nutrient contents, and redox condition of seawater, using twenty-four drill cores in South China. The results suggest that the emergence of Metazoan was caused under the less oxic and P-rich condition, whereas the diversification occurred under oxic, nitrate and Ca-rich condition. Especially, the transition from P to nitrate-rich seawater contributed to more actively mobile metazoans through increase in Redfield ratio. The biological evolution occurred just after increase in nutrients, allowing a new insight of biological evolution of metazoans. The quick response of biological evolution to the environments suggests that the fundamental base for biological functions were already established before the emergence.

Research Products

• [Journal Article] Reproductive strategy of the bradoriid arthropod Kunmingella douvillei from the Lower Cambrian Chengjiang Lagerstätte, South China (2014)
  • Author(s): Duan, Y., Han, J., Fu, D., Zhang, X., Yang, X., Komiya, T. & Shu, D.
  • Journal Title: Gondwana Research Volume: 25 Pages: 983-990
  • Peer Reviewed
• [Journal Article] FTIR microspectroscopy of Ediacaran phosphatized microfossils from the Doushantuo Formation, Weng'an, South China (2014)
  • Author(s): Igisu, M., Komiya, T., Kawashima, M., Nakashima, S., Ueno, Y., Han, J., Shu, D., Li, Y., Guo, J., Maruyama, S. & Takai, K.
  • Journal Title: Gondwana Research Pages: 1120-1138
  • Peer Reviewed
• [Journal Article] The δ^<13>C excursions spanning the Cambrian explosion to the Canglangpuian mass extinction in the Three Gorges area, South China (2014)
  • Author(s): Ishikawa, T., Ueno, Y., Shu, D., Li, Y., Han, J., Guo, J., Yoshida, N., Maruyama, S. & Komiya, T.
  • Journal Title: Gondwana Research Volume: 25 Pages: 1045-1056
  • Peer Reviewed
• [Journal Article] Nitrogen isotope chemostratigraphy of the Ediacaran and Early Cambrian platform sequence at Three Gorges, South China (2014)
  • Author(s): Kikumoto, R., Tahata, M., Nishizawa, M., Sawaki, Y., Maruyama, S., Shu, D., Han, J., Komiya, T., Takai, K. & Ueno, Y.
  • Journal Title: Gondwana Research Volume: 25 Pages: 1057-1069
  • Peer Reviewed
• [Journal Article] New chronological constraints for Cryogenian to Cambrian rocks in the Three Gorges, Weng'an and Chengjiang areas, South China (2014)
  • Author(s): Okada, Y., Sawaki, Y., Komiya, T., Hirata, T., Takahata, N., Sano, Y., Han, J. & Maruyama, S.
  • Journal Title: Gondwana Research Volume: 25 Pages: 1027-1044
  • Peer Reviewed
• [Journal Article] The anomalous Ca cycle in the Ediacaran ocean : Evidence from Ca isotopes preserved in carbonates in the Three Gorges area, South China (2014)
  • Author(s): Sawaki, Y., Tahata, M., Ohno, T., Komiya, T., Hirata, T., Maruyama, S., Han, J. & Shu, D.
  • Journal Title: Gondwana Research Volume: 25 Pages: 1070-1089
  • Peer Reviewed
• [Journal Article] In-situ analyses of phosphorus contents of carbonate minerals : Reconstruction of phosphorus contents of seawater from the Ediacaran to early Cambrian (2014)
  • Author(s): Shimura, T., Kon, Y., Sawaki, Y., Hirata, T., Han, J., Shu, D. & Komiya, T.
  • Journal Title: Gondwana Research Volume: 25 Pages: 1090-1107
  • Peer Reviewed
• [Journal Article] Molecular fossils extracted from the Early Cambrian section in the Three Gorges area, South China (2014)
  • Author(s): Yamada, K., Ueno, Y., Yamada, K., Komiya, T., Han, J., Shu, D., Yoshida, N. & Maruyama, S.
  • Journal Title: Gondwana Research Volume: 25 Pages: 1108-1119
  • Peer Reviewed
• [Journal Article] Early Cambrian Pentamerous Cubozoan Embryos from South China (2013)
  • Author(s): Han, J., Kubota, S., Li, G., Yao, X., Yang, X., Shu, D., Li, Y., Kinoshita, S., Sasaki, O., Komiya, T. & Yang, G.
  • Journal Title: PLoS ONE Volume: 8 Pages: e70741
  • Peer Reviewed
• [Journal Article] Irreversible change of the oceanic carbon cycle in the earliest Cambrian : High-resolution organic and inorganic carbon chemostratigraphy in the Three Gorges area, South China (2013)
  • Author(s): Ishikawa, T., Ueno, Y., Shu, D., Li, Y., Han, J., Guo, J., Yoshida, N. & Komiya, T.
  • Journal Title: Precambrian Research Volume: 225 Pages: 190-208
  • Peer Reviewed
• [Journal Article] Petrogenesis of the ridge subduction-related granitoids from the Taitao Peninsula, Chile Triple Junction Area (2013)
  • Author(s): Kon, Y., Komiya, T., Anma, R., Hirata, T., Shibuya, T., Yamamoto, S. & Maruyama, S.
  • Journal Title: Geochemical Journal Volume: 47 Pages: 167-183
  • Peer Reviewed
• [Journal Article] The oxygen isotope composition of Earth's oldest rocks and evidence of a terrestrial magma ocean (2013)
  • Author(s): Rumble, D., Bowring, S., Iizuka, T., Komiya, T., Lepland, A., Rosing, M. T. & Ueno, Y.
  • Journal Title: Geochemistry, Geophysics, Geosystems-G3 Volume: 14 Pages: 1929-1939
  • Peer Reviewed
• [Journal Article] High-temperature, high-pressure granulites (retrogressed eclogites) in the central region of the Lewisian, NW Scotland : Crustal-scale subduction in the Neoarchaean (2013)
  • Author(s): Sajeev, K., Windley, B. F., Hegner, E. & Komiya, T.
  • Journal Title: Gondwana Research Volume: 23 Pages: 526-538
  • Peer Reviewed
• [Journal Article] Decrease of seawater CO_2 concentration in the Late Archean : An implication from 2.6 Ga seafloor hydrothermal alteration (2013)
  • Author(s): Shibuya, T., Tahata, M., Ueno, Y., Komiya, T., Takai, K., Yoshida, N., Maruyama, S. & Russell, M. J.
  • Journal Title: Precambrian Research Volume: 236 Pages: 59-64
  • Peer Reviewed
• [Journal Article] Carbon and oxygen isotope chemostratigraphies of the Yangtze platform, South China : Decoding temperature and environmental changes through the Ediacaran (2013)
  • Author(s): Tahata, M., Ueno, Y., Ishikawa, T., Sawaki, Y., Murakami, K., Han, J., Shu, D., Li, Y., Guo, J., Yoshida, N. & Komiya, T.
  • Journal Title: Gondwana Research Volume: 23 Pages: 333-353
  • Peer Reviewed
• [Journal Article] Recycled crustal zircons from podiform chromitites in the Luobusa ophiolite, southern Tibet (2013)
  • Author(s): Yamamoto, S., Komiya, T., Yamamoto, H., Kaneko, Y., Terabayashi, M., Katayama, I., Iizuka, T., Maruyama, S., Yang, J., Kon, Y. & Hirata, T.
  • Journal Title: Island Arc Volume: 22 Pages: 89-103
  • Peer Reviewed
• [Journal Article] Depth variation of carbon and oxygen isotopes of calcites in Archean altered upper oceanic crust : Implications for the CO2 flux from ocean to oceanic crust in the Archean (2012)
  • Author(s): Shibuya, T., Tahata, M., Kitajima, K., Ueno, Y., Komiya, T., Yamamoto, S., Igisu, M., Terabayashi, M., Sawaki, Y., Takai, K., Yoshida, N. & Maruyama, S.
  • Journal Title: Earth and Planetary Science Letters Volume: 321-322 Pages: 64-73
  • Peer Reviewed
• [Journal Article] In situ iron isotope analyses of pyrite and organic carbon isotope ratios in the Fortescue Group : Metabolic variations of a Late Archean ecosystem (2012)
  • Author(s): Yoshiya, K., Nishizawa, M., Sawaki, Y., Ueno, Y., Komiya, T., Yamada, K., Yoshida, N., Hirata, T., Wada, H. & Maruyama, S.
  • Journal Title: Precambrian Research Volume: 212-213 Pages: 169-193
  • Peer Reviewed
• [Journal Article] Water content of the mantle xenoliths from Kimberley and implications for explaining textural variations in cratonic roots (2011)
  • Author(s): Katayama, I., Michibayashi, K., Terao, R., Ando, J.-I. & Komiya, T.
  • Journal Title: Geological Journal Volume: 46 Pages: 173-182
  • Peer Reviewed
• [Journal Article] Continental recycling and true continental growth (2011)
  • Author(s): Komiya, T.
  • Journal Title: Russian Geology and Geophysics Volume: 52 Pages: 1516-1529
  • Peer Reviewed
• [Journal Article] Geochemistry, petrogenesis and geodynamic origin of basalts from the Katun' accretionary complex of Gorny Altai (southwestern Siberia) (2011)
  • Author(s): Safonova, I. Y., Buslov, M. M., Simonov, V. A., Izokh, A. E., Komiya, T., Kurganskaya, E. V. & Ohno, T.
  • Journal Title: Russian Geology and Geophysics Volume: 52 Pages: 421-442
  • Peer Reviewed
• [Journal Article] A new concept of continental construction in the Central Asian Orogenic Belt (compared to actualistic examples from the Western Pacific) (2011)
  • Author(s): Safonova, I. Y., Seltman, R., Kröner, A., Gladkochub, D., Schulmann, K., Xiao, W., Kim, J., Komiya, T. & Sun, M.
  • Journal Title: Episodes Volume: 34 Pages: 186-196
  • Peer Reviewed
• [Journal Article] Geochemical diversity in oceanic basalts hosted by the Zasur'ya accretionary complex, NW Russian Altai, Central Asia : Implications from trace elements and Nd isotopes (2011)
  • Author(s): Safonova, I. Y., Sennikov, N. V., Komiya, T., Bychkova, Y. V. & Kurganskaya, E. V.
  • Journal Title: Journal of Asian Earth Sciences Volume: 42 Pages: 191-207
  • Peer Reviewed
• [Presentation] The oldest accretionary complex and the beginning of the Pacific-type orogeny based on geology of the 3.96 Ga Nulliak supracrustal rocks in Labrador (2013)
  • Author(s): Komiya, T., Yamamoto, S., Shimojo, M. & Aoki, S.
  • Organizer: The International Biogeoscience Conference 2013 Nagoya
  • Place of Presentation: Japan, Nagoya, Japan
  • Year and Date: 2013-11-03
• [Presentation] Geology of the Nain Complex, Labrador, Canada : Occurrence of the Early Archean supracrustals (2012)
  • Author(s): Komiya, T., Shimojo, M., Yamamoto, S., Sawaki, Y., Ishikawa, A., Aoki, K. & Collerson, K. D.
  • Organizer: The 22nd V.M. Goldschmidt Conference
  • Place of Presentation: Montréal, Québec, Canada
  • Year and Date: 20120624-29
• [Presentation] Synchrotron X-ray Micro-Ct analyses of the Early Cambrian microfossils (2012)
  • Author(s): Komiya, T., Han, J., Nakao, T., Uesugi, K. & Hoshino, M.
  • Organizer: GSA Annual meeting
  • Place of Presentation: Charlotte, North Carolina, USA
  • Year and Date: 2012-11-05
• [Presentation] Ediacaran carbon isotope anomaly records shallow marine event, not entire ocean (2012)
  • Author(s): Tahata, M., Ueno, Y., Sawaki, Y., Kikumoto, R., Nishizawa, M., Komiya, T., Yoshida, N. & Maruyama, S.
  • Organizer: The 22nd V.M. Goldschmidt Conference
  • Place of Presentation: Montréal, Québec, Canada
  • Year and Date: 2012-06-27
• [Remarks]
  • URL: http://ea.c.u-tokyo.ac.jp/earth/Members/komiya.html