Japan Geoscience Union Meeting 2016

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International Session (Oral)

Symbol B (Biogeosciences) » B-CG Complex & General

[B-CG04] Earth and Planetary Science Frontiers for Life and Global Environment

Sun. May 22, 2016 1:45 PM - 3:15 PM 201A (2F)

Convener:*Yohey Suzuki(Graduate School of Science, The University of Tokyo), Yoshinori Takano(Japan Agency for Marine-Earth Science and Technology (JAMSTEC)), Shingo Kato(Japan Agency for Marine-Earth Science and Technology), Katsunori Yanagawa(Graduate School of Social and Cultural Studies, Kyushu University), Tadashi Yokoyama(Department of Earth and Space Science, Graduate School of Science, Osaka University), Chair:Yoshinori Takano(Japan Agency for Marine-Earth Science and Technology (JAMSTEC)), Katsunori Yanagawa(Graduate School of Social and Cultural Studies, Kyushu University)

2:00 PM - 2:15 PM

[BCG04-02] Niche separation of nitrifiers from the sea surface to the hadal ocean

★Invited papers

*Takuro Nunoura1 (1.Research and Development Center for Marine Biosciences, Japan Agency for Marine-Earth Science & Technology (JAMSTEC), 2.Department of Subsurface Geobiological Analysis and Research, Japan Agency for Marine-Earth Science & Technology (JAMSTEC))

Keywords:nitrification, ocean, nitrogen cycle

Ammonium (ammonia) and nitrite are important intermediates of oceanic nitrogen cycle, but these are depleted in most of the oceanic waters. In contrast, availability of ammonia most likely influence on niche separation of nitrifiers, and thus the niche separation would be a signature of geochemical interface in oceanic environments. In fact, niche separation of nitrifiers has been observed in Arctic to tropical oceans, and sea surface to hadal ocean (Sintes et al. 2013, Nunoura et al. 2015 and references therein). In this study, we analyzed single amplified genomes (SAGs) to know genomic backgrounds of niche separation of ammonia-oxidizing thaumarchaeotes from sea surface to hadal oceans.