Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Oral

M (Multidisciplinary and Interdisciplinary) » M-ZZ Others

[M-ZZ41] Marine manganese deposits: from basic to applied sciences

Wed. May 23, 2018 10:45 AM - 12:15 PM A11 (Tokyo Bay Makuhari Hall)

convener:Akira Usui(Marine Core Research Center, Kochi University), Yoshio Takahashi(Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo), Katsuhiko Suzuki(国立研究開発法人海洋研究開発機構・海底資源研究開発センター, 共同), Takashi Ito(Faculty of Education, Ibaraki University), Chairperson:Usui Akira, Suzuki Katsuhiko(JAMSTEC), Takahashi Yoshio(東京大学)

11:15 AM - 11:30 AM

[MZZ41-03] Heterogeneity of microbial life on bathyal and abyssal ferromanganese crusts in the Takuyo-Daigo and Takuyo-Daisan seamounts

*Shingo Kato1, Katsuhiko Suzuki1 (1.Japan Agency for Marine-Earth Science and Technology)

Ferromanganese crusts mainly composed of Fe and Mn oxides are commonly observed on outcrops in deep-sea old seamounts. Previous 16S rRNA gene analyses have indicated the presence of diverse microorganisms on the ferromanganese crusts at bathyal zones (1000 m to 3000 m water depths) in the Takuyo-Daigo Seamount, the northwestern Pacific. Although the presence of crusts has been confirmed at abyssal zones (up to 5500 m) in the Takuyo-Daigo Seamount in 2016, little is known about the microbial communities on the abyssal ferromanganese crusts. In 2017, we found ferromanganese crusts at 1500 m to 5500 m water depths in the Takuyo-Daisan Seamount, which is also located in the northwestern Pacific, approx. 350 km away from Japan, and collected some crusts for microbiological analyses. Here, we report the heterogeneity of microbial community structures and metabolic functions of the crusts collected from bathyal and abyssal zones in the two seamounts as revealed by 16S rRNA gene tag analysis and shotgun metagenomics.