Multidisciplinary and Interdisciplinary (M)
Session Sub-category Intersection(IS)
Session ID M-IS22
Title Interactions of Geosphere-Hydrosphere-Biosphere and Deep-sea Methane Environments
Short Title Deep-sea Methane in Geo-Hydro-Biospheres
Main Convener Name Yusuke Miyajima
Affiliation Geomicrobiology Research Group, Research Institute for Geo-Resources and Environment, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology
Co-Convener 1 Name Akira Ijiri
Affiliation Kobe University
Co-Convener 2 Name Robert Jenkins
Affiliation School of Geosciences and Civil Engineering, College of Science and Engineering, Kanazawa University
Co-Convener 3 Name Hitoshi Tomaru
Affiliation Department of Earth Sciences, Chiba University
Session Language 
J
Scope 
Methane produced in marine sediments is transported to the seafloor and discharged at cold seeps, mud volcanoes, and hydrothermal vents. The discharged methane and fluids form unique environments, such as methane hydrates, carbonates, and chimneys, and sustain chemosynthetic ecosystems. Methane and the methane-driven phenomena are closely related to the ocean and global environmental changes, material cycles, and evolution of life, making them a key for better understanding of the interactions among Geosphere-Hydrosphere-Biospheres. Deepening and expanding our knowledge of these processes will also contribute to the sustainable development of human society, including resource utilization, disaster prevention, and biodiversity and ecosystem conservation. This session welcomes latest research topics on the geochemical origin of methane and fluids, the geophysical background, resource sciences, and geobiology of chemosynthetic ecosystems at cold seeps, mud volcanoes, and hydrothermal vents, regardless of whether the field is marine or terrestrial, present or past. Based on these topics, we aim to promote active interactions between scientists from multiple fields and the development of a multidisciplinary research community.
All the presentations in this session are given in Japanese or English. However, figures and tables should be prepared in English.
Presentation Format Oral and Poster presentation
Invited Authors Federica Donda (National Institute of Oceanography and Applied Geophysics -OGS)
Yuji Onishi (Research Institute for Humanity and Nature)
Pei-Yuan Qian (The Hong Kong University of Science and Technology)
Time Presentation No Title Presenter
Oral Presentation May 26 AM1
09:00 - 09:15 MIS22-01 Gas seeps and methane-derived carbonates in the Northern Adriatic Sea (Italy) Federica Donda
09:15 - 09:30 MIS22-02 Chemistry, Observation and Ecology of Submarine Seeps (COESS): Research and activities related to a UN Ocean Decade action plan. Glen Snyder
09:30 - 09:45 MIS22-03 Drilling survey on the shallow methane hydrate-bearing area off Sakata and Joetsu, Sea of Japan. Mikio Satoh
09:45 - 10:00 MIS22-04 Deep fluid input into gas hydrate areas of the Japan Sea: Insights from Li isotope composition of sedimentary pore fluids Yusuke Miyajima
10:00 - 10:15 MIS22-05 129I and halogen distributions at gas hydrate field offshore Hikurangi subduction zone Satoko Owari
10:15 - 10:30 MIS22-06 Origin of fluids in surface sediments of submarine mud volcanoes off Hyuganada, Tanegashima Island, and Kikaijima Island Kantaro Yamada
Oral Presentation May 26 AM2
10:45 - 11:00 MIS22-07 Formation Processes of Oligocene Methane-seep Carbonates in Urahoro, Hokkaido, Japan. Daichi Yanagawa
11:00 - 11:15 MIS22-08 Single-cell RNA-seq revealed distinct metabolic “micro-niches” and close microbe-host interaction in deep-sea chemosynthetic tubeworm Pei-Yuan Qian
11:15 - 11:30 MIS22-09 Chemosynthetic production supporting benthic food-web in a freshwater lake Yuji Onishi
11:30 - 11:45 MIS22-10 Environmental impact assessment for the development of methane hydrates: chemical properties of shallow surface sediments on Joetsu Knoll, Japan Sea Ai Genda
Presentation No Title Presenter
Poster Presentation May 26 PM3
MIS22-P01 Distribution of methane seep in the Sea of Okhotsk off Abashiri and consideration of sampling method Nakamura Kotomi
MIS22-P02 Exploration of natural gas seepage using acoustic techniques in the Kujukuri offshore region, Chiba, Japan HIROSHI ISHIDA
MIS22-P03 Measurement of dissolved methane concentrations in the hydrate area off Jyoetsu by methane sensors Hideyoshi Yoshioka
MIS22-P04 Wireline logging results for researching physical property of methane hydrate reservoirs of off Joetsu and off Sakata area in the Japan Sea Kiyofumi Suzuki
MIS22-P05 Geomechanical properties of gas hydrate reservoir sediments in Japan Sea (Off Joetsu and Sakata) Shinsuke Aoki
MIS22-P06 Anomalously high chloride content in pore water at the methane hydrate field off Joetsu, eastern margin of the Japan Sea Yasumasa Sakai
MIS22-P07 The sulfur isotope fingerprint of the active methane seepage events in the Pleistocene sediments collected from the northeastern Japan Sea Yuki Ota
MIS22-P08 Ground-truthing, detailed bathymetry, and transition of bathymetry at a shallow methane hydrate-bearing mound, Umitaka Spur, off Joetsu, Sea of Japan Miho Asada
MIS22-P09 Seismological effective elements for causing acoustic blanking structure related with methane hydrate on seismic surveys Hayato MATSUSHITA
MIS22-P10 Distribution of Mud volcanoes off Kikai-jima to Hyuga-nada – Preliminary result from geophysical survey during KH-23-4 cruise - Hironori Otsuka
MIS22-P11 Porosity of mud volcano ejecta in the Western Nankai Trough and Northern Ryukyu Trench collected from research cruise KH-23-4 Rina Fukuchi
MIS22-P12 Emission of dissolved organic carbon and nutrients from submarine mud volcanoes. Yui Yoshizaki
MIS22-P13 Digital DEPTH – UN Decade of Ocean Program Pei-Yuan Qian
MIS22-P14 Zooplankton communities offshore Joetsu, Japan: horizontal and vertical characteristics of structure, trophic levels, and diet Koki Tokuhiro
MIS22-P15 Plankton surveys near mud volcanoes in the Nankai Trough and Ryukyu Trench Hiromi Kayama WATANABE
MIS22-P16 Discharge and dispersal of deep sub-seafloor microorganisms from mud volcanoes into ocean Tatsuhiko Hoshino
MIS22-P17 Species compositions and distribution patterns of gastropods on deployed whale carcasses
at the Tsukumo Bay, Noto Peninsula, Japan 		Robert Jenkins