Research on factors controlling open ocean benthopelagic ecosystem dynamics

Fiscal Year

2011

Title

Research on factors controlling open ocean benthopelagic ecosystem dynamics

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
2012/03/06 - 2012/03/30
Research Area
Off Tohoku, Pacific
0001_R01_map00.pdf
Category
Research Cruise
Overview
Investigations of topography, environmental factors, ecosystems using deep-sea research facilities.

Overview of the Observation

Research Point Table
Polygon
NameArea1:MR12-E02_leg1
Coordinates37.5,141/40.5,141/40.5,143.33333/37.5,143.33333
RemarksVertexes of the polygon
NameArea1:MR12-E02_leg2
Coordinates37.5,141/40.5,141/40.5,143.33333/37.5,143.33333
RemarksVertexes of the polygon
NameArea1:MR12-E02_leg3
Coordinates37,141/41,142/41,143.33333/37,143.33333
RemarksVertexes of the polygon
Research Point Map & Track Chart Map & Point List
0001_R01_list01.pdf, 0001_R01_list02.pdf, 0001_R01_list03.pdf, 0001_R01_list04.pdf, 0001_R01_map01.pdf, 0001_R01_map02.pdf, 0001_R01_map03.pdf
Results and Future Plan
Investigation subjects of these cruises are topographic surveys, mapping of scattered debris, distribution patterns and diversity of benthic organisms, seawater and sediments geochemistry, and sediments characteristics. Based on these data and samples, we will construct habitat map for ecosystem management in Sanriku areas. Detail Leg1: In this 1st leg, we obtained acoustic data to fully understand the recent bathymetry,seafloor condition and sub-bottom structure. We also tried out the high accuracy bathymetric survey for correcting the marine earthquake debris using a deep-tow system. Leg2: During MR12-E02-Leg2 in Off Iwate and Miyagi areas, we investigated following subjects, 1) Distribution patterns of benthic organism, geological, debris distribution, chemical and physics analyses using 4000 m class deep-towing TV camera system, 2) Chemical and physics analyses using CTD water sampler, 3) Topographic surveys using MBES, 4) Geophysical survey using Gravity, Gradio & Magnet meters. All data will be analyzed to estimate impact to the marine ecosystems by the 2011 Off Tohoku Earthquake and tsunami. Leg3: During the Leg3, we mainly investigated on environmental monitoring of water column and the sediments. Some sediment samples and organism samples were also utilized to assess pollutants in the environments and distribution, genetic diversity, and trophic analysis of the benthic organisms. For the water sampling, we used a CTD-Rosetta water sampler and a continuous sea surface water monitoring system. For the sediment samplings, we used a multiple corer with 74 mm inner diameter. We operated 14 CTD casts at 14 stations and 15 Multiple corer samplings at 8 stations. During the cruise, we continuously surveyed the bottom topography, gravity, and geomagnetic field.

Investigation Item and Data Acquisition

Investigation ItemData Acquisition
Topography and geologyMBES, SBP, Sediments
Sea bottom observations using Deep-towPhotos, Movies
Water environmental factorsWT, Sal, DO, COD, Transparency
GeophysicsGravity, Magnetic force

Reference

Related Observation Plan
FY2011 Research on factors controlling open ocean benthopelagic ecosystem dynamics
Related Observation Data
MR12-E02_leg1 Navigation
MR12-E02_leg1 Bathymetry
MR12-E02_leg1 Gravity
MR12-E02_leg1 STCM
MR12-E02_leg1 TMI
MR12-E02_leg1 ADCP
MR12-E02_leg1 XBT
MR12-E02_leg2 Navigation
MR12-E02_leg2 Bathymetry
MR12-E02_leg2 Gravity
MR12-E02_leg2 STCM
MR12-E02_leg2 ADCP
MR12-E02_leg2 XCTD
MR12-E02_leg2 XBT
MR12-E02_leg2 CTD
MR12-E02_leg2 Bottle
MR12-E02_leg2 TSG
MR12-E02_leg2_DT Picture
MR12-E02_leg2_DT MOV
MR12-E02_leg2_DT CTD DO Turbidity
MR12-E02_leg3 Navigation
MR12-E02_leg3 Bathymetry
MR12-E02_leg3 Gravity
MR12-E02_leg3 STCM
MR12-E02_leg3 ADCP
MR12-E02_leg3 XCTD
MR12-E02_leg3 XBT
MR12-E02_leg3 Core
MR12-E02_leg3 CTD
MR12-E02 Leg1 Sub-Bottom Profiler (SBP)
MR12-E02_leg3 TSG
MR12-E02_leg2_Biological sample data
MR12-E02_leg3_Biological sample data
MR12-E02 Leg2 Sub-Bottom Profiler (SBP)
MR12-E02 Leg2 Chlorophyll
MR12-E02 Leg2 Dissolved Oxygen
MR12-E02 Leg3 Sub-Bottom Profiler (SBP)
MR12-E02 Leg3 Chlorophyll
MR12-E02 Leg3 Dissolved Oxygen

Person in charge of Investigation

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

Keywords

Fiscal Year2011
OrganizationJapan Agency for Marine-Earth Science and Technology
CategoryResearch Cruise
Research AreaNorth Sanriku
South Sanriku
Off Tohoku
DisciplineOcean physics -> Water temperature
Ocean physics -> Salinity
Ocean physics -> Transparency / Turbidity
Ocean chemistry -> Salinity
Ocean chemistry -> Dissolved oxygen
Ocean environment -> pH
Ocean environment -> Chemical oxygen demand (COD)
Ocean environment -> Seawater
Ocean environment -> Sediment
Ocean biology / Ocean ecology -> Biological classification
Ocean biology / Ocean ecology -> Biomass
Ocean biology / Ocean ecology -> Ecology
Ocean biology / Ocean ecology -> Fishes
Ocean biology / Ocean ecology -> Arthropods
Ocean biology / Ocean ecology -> Mollusks
Topography / Geology / Geophysics -> Bathymetry
Topography / Geology / Geophysics -> Topography
Topography / Geology / Geophysics -> Seabed morphology
Topography / Geology / Geophysics -> Geological structure
Topography / Geology / Geophysics -> Bottom sediment
Topography / Geology / Geophysics -> Marine sediments
Topography / Geology / Geophysics -> Geomagnetism
Topography / Geology / Geophysics -> Gravity
Topography / Geology / Geophysics -> Tsunami
Topography / Geology / Geophysics -> Others