Fiscal Year
2012
Title
Field experiment of origin of carbon/nitrogen in attached algae 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 person | Toshi Nagata |
|---|
| Organization | Atmosphere and Ocean Research Institute, The University of Tokyo |
|---|
| Department | Department of Chemical Oceanography, Marine Biochemistry |
|---|
Research InformationPeriod and Interval2012/11/01 - 2013/03/31
Research Area
Otsuchi Bay
CategoryMooring system(Observation buoy)
OverviewMortar board and sporophyte of Undaria pinnatifida will be moored at 8 points in Otsuchi Bay during winter to spring. After mooring attached algae, which will be inhabited on the board and sporophyte of Undaria pinnatifida will be harvested for analyses of isotopic composition of carbon and nitrogen to examine origins of the elements. At selected 2 stations, temperature and salinity will be monitored.
Overview of the Observation
Research Point Table
| Point | | Name | 1 |
|---|
| Coordinates | 39.354,141.954 |
|---|
| Name | 2 |
|---|
| Coordinates | 39.347,141.934 |
|---|
| Name | 3 |
|---|
| Coordinates | 39.354,141.912 |
|---|
| Name | 4 |
|---|
| Coordinates | 39.339,141.904 |
|---|
| Name | 5 |
|---|
| Coordinates | 39.337,141.901 |
|---|
| Name | 6 |
|---|
| Coordinates | 39.329,141.903 |
|---|
| Name | 7 |
|---|
| Coordinates | 39.3302,141.9445 |
|---|
| Name | 8 |
|---|
| Coordinates | 39.3363,141.9693 |
|---|
|
|---|
Research Point Map & Track Chart Map & Point List
Results and Future PlanMortar board and sporophyte of Undaria pinnatifida were moored at 8 points on 30 November. Because deployment of Undaria farming rafts by fisherman was delayed about one month by high water temperature during fall period, we followed their deployment. The system will be moored until middle of March 2013.Because harvest of Undaria by fisherman will start on 15 March, we finished mooring on 14 March. Though all mortar boards mooed at station 1 were lost, all of other mortar boards were collected from other stations. Mortar boards with attached algae and collected Undaria was kept -20 deg. C and archived in AORI.
Investigation Item and Data Acquisition
| Investigation Item | Data Acquisition |
|---|
| Water property | Temperature, salinity |
| Attached algae | Biomass, isotopic composition of carbon/nitrogen |
Reference
Person in charge of Investigation
| Representative person | Hideki Fukuda |
|---|
| Organization | Atmosphere and Ocean Research Institute, The University of Tokyo |
|---|
| Department | International Coastal Research Center, Coastal Conservation |
|---|
| Fiscal Year | 2012 |
|---|
| Organization | Atmosphere and Ocean Research Institute, The University of Tokyo |
|---|
| Category | Mooring system (Observation buoy) |
|---|
| Research Area | South Sanriku |
|---|
| Discipline | Ocean physics -> Water temperature
Ocean physics -> Salinity
|
|---|
