Fiscal Year
2013
Title
The investigations of environments and living organisms in the estuary and tidal-flat sediments
Project and Theme
Project 1. Study on ecological succession of fisheries ground
Representative Organization: Tohoku University
Theme3. Research on the coastal fisheries resources and the tidal flat faunas off Miyagi Prefecture| Representative person | Satoshi Katayama |
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| Organization | Tohoku University |
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| Department | Graduate School of Agricultural Science |
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Research InformationPeriod and Interval2013/04/01 - 2014/03/31
monthly
Research Area
Estuaries and tidal flats in the Sendai Bay
CategoryField survey
OverviewEnvironmental analyses of water and sediment qualityInvestigations of species composition and biomass of the macrobenthos and plankton
Overview of the Observation
Research Point Table
| Point | | Name | Stn A |
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| Coordinates | 38.257828,141.014494 |
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| Name | Stn B |
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| Coordinates | 38.254911,141.012817 |
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| Name | Stn C |
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| Coordinates | 38.254469,141.006858 |
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Research Point Map & Track Chart Map & Point List
Results and Future PlanEnvironmental factors are still on their way to become stable. Especially salinity data is different from that of before the big earthquake and tsunami. Benthic animals disappeared drastically just after the earthquake and followed by opportunistic polychaetes first and then occupied by 90% of polychaete species at the very beginning of the phase. Benthic density gradually increased forward, and not only polychaetes but crustacean species appeared secondary, bivalve species followed lastly. It seemed that the species which show planktotrophic larval development appeared first after the turbulence. We found a new record species from Japan on our way. We continue to survey the benthic community and environmental factors to understand their successions in tidal flats.
Investigation Item and Data Acquisition
| Investigation Item | Data Acquisition |
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| water and sediment quality survey | water tempreture, salinity, pH, DO |
| macrobenthos monitoring | species composition and biomass of the macrobenthos |
| plankton monitoring | species composition and biomass of the phytoplankton and zooplankton |
Reference
Person in charge of Investigation
| Representative person | Goh Nishitani |
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| Organization | Tohoku University |
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| Department | Graduate School of Agricultural Science |
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| Fiscal Year | 2013 |
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| Organization | Tohoku University |
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| Category | Field survey |
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| Research Area | Ishinomaki Bay |
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| Discipline | Ocean physics -> Water temperature
Ocean physics -> Salinity
Ocean chemistry -> Dissolved oxygen
Ocean chemistry -> Nutrients
Ocean environment -> Nutrients
Ocean environment -> Transparency
Ocean biology / Ocean ecology -> Biological classification
Ocean biology / Ocean ecology -> Biomass
Ocean biology / Ocean ecology -> Ecology
Ocean biology / Ocean ecology -> Mollusks
Ocean biology / Ocean ecology -> Plankton
Ocean biology / Ocean ecology -> Seaweed beds / Tidal flats distribution
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