Current survey on biological and nonbiological environment of coastal area in southern Iwate

Fiscal Year

2013

Title

Current survey on biological and nonbiological environment of coastal area in southern Iwate

Project and Theme

Project 1. Study on ecological succession of fisheries ground
Representative Organization: Tohoku University
Theme5. Studies on the coastal environment and marine resources in the southern part of Iwate Prefecture
Representative personRyusuke Kado
OrganizationKitasato University
DepartmentSchool of Marine Biosciences

Research Information

Period and Interval
2013/04/01 - 2014/03/31
Once a month
Research Area
Okirai Bay, Ofunato Bay
Category
Field survey
Overview
We examined seasonal variations in water environment, and phyto- and zooplankton in Okirai Bay and Ofunato Bay to estimate the impact of the 2011 disaster and monitor its recovery process. In addition, we investigated bottom sediments of Okirai Bay in summer.

Overview of the Observation

Research Point Map & Track Chart Map & Point List
0065_R01_map01.pdf
Results and Future Plan
Water environment: After the 2011 disaster, the increase in bottom DO and the decrease in P/Si were observed in Ofunato Bay. Bottom sediments: In Okirai Bay, no differences were found in mud content, ignition loss, COD and total sulfide between the pre- and post-disaster periods. Zooplankton: After the disaster, the pelagic jellyfish Aglantha digitale increased in the head of Ofunato Bay.

Investigation Item and Data Acquisition

Investigation ItemData Acquisition
Water environmentTemperature, salinity, DO, in vivo fluorescence of Chl-a, nutrients
Phyto- and zooplanktonPhyto- and zooplankton community composition
Bottom sedimentsMud content, ignition loss, COD, total sulfide

Reference

Related Observation Plan
FY2013 Current survey on biological and nonbiological environment of coastal area in southern Iwate
Related Observation Data
CTD Okirai Bay 1304-1403
CTD Ofunato Bay 2013 (1304-1311)
CTD Ofunato Bay 2014 (1401-1403)

Person in charge of Investigation

Representative personRyusuke Kado
OrganizationKitasato University
DepartmentSchool of Marine Biosciences
Representative personNobuyoshi Nanba
OrganizationKitasato University
DepartmentSchool of Marine Biosciences

Keywords

Fiscal Year2013
OrganizationKitasato University
CategoryField survey
Research AreaSouth Sanriku
DisciplineOcean physics -> Water temperature
Ocean physics -> Salinity
Ocean chemistry -> Salinity
Ocean chemistry -> Dissolved oxygen
Ocean chemistry -> Nutrients
Ocean environment -> Chemical oxygen demand (COD)
Ocean environment -> Nutrients
Ocean environment -> ARRAY(0x554a7fc)
Ocean biology / Ocean ecology -> Plankton
Topography / Geology / Geophysics -> Bottom sediment
Topography / Geology / Geophysics -> Others