Fiscal Year
2015
Title
Monitoring of nutrients and primary production in the coastal areas of Miyagi Prefecture
Project and Theme
Project 1. Study on ecological succession of fisheries ground
Representative Organization: Tohoku University
Theme1. Environmental monitoring in coastal sea areas of Miyagi Prefecture| Representative person | Yoshinari Endo |
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| Organization | Tohoku University |
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| Department | Graduate School of Agricultural Science |
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Research InformationPeriod and Interval2015/04/01 - 2016/03/31
monthly
Research Area
Onagawa Bay and other coastal areas of Miyagi Prefecture
CategoryField survey
OverviewKey words: Onagawa Bay, Nutrients, phytoplankton, zooplankton, primary production, microbial loop
Overview of the Observation
Research Point Table
| Point | | Name | 1 |
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| Coordinates | 38.44123,141.4586 |
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| Name | 3 |
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| Coordinates | 38.4295,141.4788 |
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| Name | 6 |
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| Coordinates | 38.4237,141.52158 |
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| Name | 8 |
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| Coordinates | 38.42397,141.56317 |
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| Name | 11 |
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| Coordinates | 38.40182,141.4749 |
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Results and Future PlanDIN (dissolved inorganic nitrogen) concentration was rather stable from 2012 to 2015, with similar seasonal change being lower than 3 micro-M in summer and high from autumn to early spring. Phosphate and silicic acid concentrations were low in 2012 but increased thereafter. In 2015, phosphate was less than 0.1 micro-M from summer to autumn. Chlorophyll a concentration was very low in 2012, but increased thereafter and highest in 2014. Zooplankton abundance showed similar pattern as in Chlorophyll a concentration. Primary production at the innermost bay ranged from 34.8 to 740.6 mgC/m^2/d. Copepod production ranged from 0.13 to 4.8 mgC/m^3/d.
Investigation Item and Data Acquisition
| Investigation Item | Data Acquisition |
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| water quality survey | water temperature, salinity, pH, DO, transparency, nutrients |
| plankton monitoring | phytoplankton, zooplankton |
| productivity | primary production, secondary and tertiary production of copepods |
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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| 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 | 2015 |
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| Organization | Tohoku University |
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| Category | Field survey |
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| Research Area | South Sanriku |
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| Discipline | Ocean physics -> Water temperature
Ocean physics -> Salinity
Ocean physics -> Transparency / Turbidity
Ocean chemistry -> Dissolved oxygen
Ocean chemistry -> Nutrients
Ocean chemistry -> Others
Ocean environment -> Nutrients
Ocean environment -> Transparency
Ocean environment -> Primary production
Ocean biology / Ocean ecology -> Ecology
Ocean biology / Ocean ecology -> Plankton
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