Fiscal Year
2013
Title
Diving researches on deep-sea marine ecosystems after Tohoku tsunami
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 groundsRepresentative person | Yoshihiro Fujiwara |
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Organization | Japan Agency for Marine-Earth Science and Technology |
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Department | Eastern Japan Marine Ecosystems Dynamics Project team |
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Research InformationPeriod and Interval2013/06/29 - 2013/07/05
Research Area
CategoryResearch Cruise
OverviewOf the Northeast Marine Science COE project, was carried out in the research area in Attachment (MAP) research on "changes in the submarine environment" that JAMSTEC to implement. It commissioned a flight For ships, after the operation shakedown training small ROV clammbon mechanism of ownership, we sample collection and observation seafloor, biological, etc. of rubble. In addition, in the survey area within, we mud adopted by multiple corer, we performed analysis of sediment.
Overview of the Observation
Research Point Table
Point | Name | CRB005-test |
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Coordinates | 38.24568,141.20077 |
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Name | CRB005 |
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Coordinates | 38.56617,141.94948 |
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Name | CRB006 |
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Coordinates | 39.25595,142.2139 |
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Name | CRB007 |
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Coordinates | 39.42642,142.24022 |
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Name | CRB008 |
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Coordinates | 39.43147,142.24338 |
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Name | CRB009 |
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Coordinates | 39.46513,141.99633 |
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Research Point Map & Track Chart Map & Point List
Results and Future PlanDiving researches uisng ROV Crambon were conducted off Minamisanriku, Ohtsuchi and Kamaishi and in Yamada Bay. Ophiuroids (probably Ophiura sarsii) were dominant on the deep-sea bottom at the three deeper sites (off Minamisanriku, Ohtsuchi and Kamaishi) and Pacific cods, channel rockfish, North Pacific giant octopus and snow crabs were often observed. Ophiuroids and some other benthic organisms were collected using a suction sampler installed on Crambon for genetic diversity analyses and accumulation test for hazardous substances. Digital still imaging was conducted for making large mosaic images. Density of marine debris was relatively high in Yamada Bay. Sediment core sampling was conducted off Minamisanriku, Ohtsuchi and Onagawa using multiple corers.
Investigation Item and Data Acquisition
Investigation Item | Data Acquisition |
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ROV | CTD/DO |
ROV | Digital still Camera Picture |
ROV | Hi-Vison video image |
Multiple corers | sediments |
ROV | video, still images |
Reference
Related Observation Plan
Related Observation Data
Person in charge of Investigation
Representative person | Yoshihiro Fujiwara |
Organization | Japan Agency for Marine-Earth Science and Technology |
Department | Eastern Japan Marine Ecosystems Dynamics Project team |
Keywords
Fiscal Year | 2013 |
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Organization | Japan Agency for Marine-Earth Science and Technology |
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Category | Research Cruise |
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Research Area | South Sanriku |
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Discipline | Ocean physics -> Water temperature
Ocean physics -> Salinity
Ocean chemistry -> Dissolved oxygen
Ocean environment -> Others
Ocean biology / Ocean ecology -> Others
Topography / Geology / Geophysics -> Marine sediments
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