Observation on dynamics of ecosystem and material cycling in Otsuchi Bay

Fiscal Year

2011

Title

Observation on dynamics of ecosystem and material cycling in Otsuchi Bay

Project and Theme

Project 2. Studies on the mechanisms of marine ecosystem change
Representative Organization: Atmosphere and Ocean Research Institute The University of Tokyo
Theme3. Study on material circulation process changes accompanying the earthquake
Representative personToshi Nagata
OrganizationAtmosphere and Ocean Research Institute The University of Tokyo
DepartmentDepartment of Chemical Oceanography, Marine Biochemistry

Research Information

Period and Interval
2011/04/01 - 2012/03/31
Once for two months
Research Area
Otsuchi Bay
Research Point Table
Point
Name0
Coordinates39.351,141.932
Name1
Coordinates39.347,141.941
Name2
Coordinates39.343,141.946
Name3
Coordinates39.34,141.949
Name4
Coordinates39.335,141.939
Name5
Coordinates39.339,141.934
Name6
Coordinates39.341,141.93
Name7
Coordinates39.344,141.925
Name8
Coordinates39.349,141.918
Name9
Coordinates39.34,141.909
Name10
Coordinates39.338,141.912
Name11
Coordinates39.336,141.913
Name12
Coordinates39.332,141.915
Name13
Coordinates39.33,141.916
Name14
Coordinates39.329,141.904
Name15
Coordinates39.332,141.902
Name16
Coordinates39.333,141.902
Name17
Coordinates39.336,141.901
Name18
Coordinates39.338,141.901
Name1'
Coordinates39.345,141.944
Name2'
Coordinates39.342,141.948
Category
Field survey
Overview
Bimonthly observation at Otsuchi Bay is planned to reveal effect of the Great East Japan Earthquake. 20 sampling stations will be established covering inner half area of Otsuchi Bay from center of the bay to mouse of Unosumai River. CTD observation will be conducted at all sampling station. Water sample organisms will be collected from some depth layers at selected 4 stations within the 20 stations by Niskin bottle. Sediment sampling will be conducted collected from surface of sea floor at selected 12 stations from the 20 stations by Smith-Mcintyre sampler. River water for nutrient analysis will be also collected from the surface of Otsuchi, Kozuchi and Unosumai River.

Investigation Item and Data Acquisition

Investigation ItemData Acquisition
Water propertyTemperature, salinity, concentrations of chlorophyll a, dissolved organic carbon/nitrogen and particulate organic carbon/nitrogen and related physicochemical environmental parameters
Planktonic organismAbundances of virus, prokaryote and protist
Sediment propertyOrganic carbon/nitrogen contents

Reference

Related Observation Result
FY2011 Observation on dynamics of ecosystem and material cycling in Otsuchi Bay

Person in charge of Investigation

Representative personHideki FUKUDA
OrganizationAtmosphere and Ocean Research Institute, The University of Tokyo
DepartmentCoastal Conservation Section, International Coastal Research Center

Keywords

Fiscal Year2011
OrganizationAtmosphere and Ocean Research Institute, The University of Tokyo
CategoryField survey
Research AreaSouth Sanriku
DisciplineOcean physics -> Water temperature
Ocean physics -> Salinity
Ocean chemistry -> Salinity
Ocean chemistry -> Nutrients
Ocean chemistry -> Organic matter
Ocean environment -> Nutrients
Ocean environment -> Plant pigments
Ocean environment -> Transparency
Ocean environment -> Organic carbon
Ocean environment -> Organic nitrogen
Ocean environment -> Seawater
Ocean environment -> Suspended solids
Ocean environment -> Sediment
Ocean environment -> Creature
Ocean biology / Ocean ecology -> Biomass
Ocean biology / Ocean ecology -> Viruses
Ocean biology / Ocean ecology -> Bacteria
Ocean biology / Ocean ecology -> Archaea
Ocean biology / Ocean ecology -> Protists
Ocean biology / Ocean ecology -> Plankton