Diving researches on deep-sea marine ecosystems after Tohoku tsunami using the ROV Hyper-Dolphin

Fiscal Year

2013

Title

Diving researches on deep-sea marine ecosystems after Tohoku tsunami using the ROV Hyper-Dolphin

Project and Theme

Project 3. Research on factors controlling open ocean benthopelagic ecosystem dynamics
Representative Organization: Japan Agency for Marine-Earth Science and Technology
Theme1. Research on mapping and decomposition of debris in fisheries grounds
Representative personYoshihiro Fujiwara
OrganizationJapan Agency for Marine-Earth Science and Technology
DepartmentEastern Japan Marine Ecosystems Dynamics Project team
Theme2. Research on distribution, behavior and population structure of biological resources
Representative personKatsunori Fujikura
OrganizationJapan Agency for Marine-Earth Science and Technology
DepartmentEastern Japan Marine Ecosystems Dynamics Project team
Theme3. Long-term monitoring of the physic-chemical environment in fisheries grounds
Representative personShuichi Watanabe
OrganizationJapan Agency for Marine-Earth Science and Technology
DepartmentEastern Japan Marine Ecosystems Dynamics Project team
Theme4. Trophic position and bioaccumulation studies in marine organisms
Representative personNaohiko Ohkouchi
OrganizationJapan Agency for Marine-Earth Science and Technology
DepartmentEastern Japan Marine Ecosystems Dynamics Project team
Theme5. Habitat and ecosystem mapping
Representative personHiroshi Kitazato
OrganizationJapan Agency for Marine-Earth Science and Technology
DepartmentEastern Japan Marine Ecosystems Dynamics Project team

Research Information

Period and Interval
2013/10/06 - 2013/11/04
Research Area
Category
Research Cruise

Overview of the Observation

Research Point Map & Track Chart Map & Point List
Results and Future Plan
- Precise topographic mapping SeaBat survey was conducted (see survey map) - 3D mapping of marine tsunami debris and associated fauna 3D mapping was conducted using seaXerocks - Understanding of decomposition process of marine tsunami debris Experimentally deployed wood was retrieved. - Bio-tracking of fishery resources First deployment and recovery of bio-tracking systems were conducted. - Long-term measurement of physico-chemical factors in the deep sea A long-term lander system, which was deployed for more than one year, was retrieved. -Towed acoustic survey Some high back scattering object were detected.

Investigation Item and Data Acquisition

Investigation ItemData Acquisition
Towed acoustic surveyBack scatter data, subbottom data
Undersea observation study(Topography, geology, debris, sediment, seawater around) undersea video data
Bottom organisms studyDistribution, and species composition of bottom organisms, grain size distribution

Reference

Related Observation Plan
Related Observation Data

Person in charge of Investigation

Representative personYoshihiro Fujiwara
OrganizationJapan Agency for Marine-Earth Science and Technology
DepartmentEastern Japan Marine Ecosystems Dynamics Project team

Keywords

Fiscal Year2013
OrganizationJapan Agency for Marine-Earth Science and Technology
CategoryResearch Cruise
Research AreaSouth Sanriku
DisciplineOcean physics -> Water temperature
Ocean physics -> Salinity
Ocean physics -> Ocean current / Tidal current (Current direction/Current speed)
Ocean physics -> Tide / Tide level / Water level
Ocean physics -> Surface topography
Ocean physics -> Sea ice
Ocean physics -> Tsunami
Ocean physics -> Simulation / Assimilation re-analysis
Ocean physics -> Transparency / Turbidity
Ocean chemistry -> Salinity
Ocean chemistry -> Dissolved oxygen
Ocean chemistry -> Nutrients
Ocean chemistry -> pH
Ocean chemistry -> Trace elements
Ocean chemistry -> Organic matter
Ocean chemistry -> Radioactive isotope
Ocean chemistry -> Radioactive Substance
Ocean chemistry -> Carbon dioxide
Ocean chemistry -> Methane
Ocean chemistry -> Total carbonic acid
Ocean chemistry -> Alkalinity
Ocean chemistry -> Simulation / Assimilation re-analysis
Ocean environment -> Others
Ocean biology / Ocean ecology -> Others
Topography / Geology / Geophysics -> Bathymetry
Topography / Geology / Geophysics -> Topography
Topography / Geology / Geophysics -> Seabed morphology
Topography / Geology / Geophysics -> Stratigraphy
Topography / Geology / Geophysics -> Geological structure
Topography / Geology / Geophysics -> Marine sediments
Topography / Geology / Geophysics -> Tsunami