Fiscal Year
2014
Title
Survey on sessile organisms 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
Theme2. Study on the disruption and subsequent recovery process in the ecosystem suffered from earthquake and tsunamiRepresentative person | Tomohiko Kawamura |
---|
Organization | Atmosphere and Ocean Research Institute The University of Tokyo |
---|
Department | International Coastal Research Center, Coastal Ecosystem Restoration |
---|
Research InformationPeriod and Interval2014/04/01 - 2015/03/31
once every three months
Research Area
Otsuchi Bay
CategoryField survey, Mooring system(Observation buoy)
OverviewWe deployed settlement panels at different localities in Otsuchi Bay; at each locality panels are spaced at 5 m depth intervals, with a logger for temperature attached to the each set of panels. The goal is to elucidate the seasonality of sessile organisms in different localities in the bay.
Overview of the Observation
Research Point Table
Point | Name | Matsushima |
---|
Coordinates | 39.345317,141.917683 |
---|
Name | Nagasaku |
---|
Coordinates | 39.352367,141.951983 |
---|
Name | Hiraiso |
---|
Coordinates | 39.3348,141.9279 |
---|
|
Results and Future PlanTwo barnacle species Balanus trigonus and Megabalanus rosa were remarkably abundant in summer. The barnacles showed different distribution patterns in depth; M. rosa tend to be abundant in 5-10 m deep, while B. trigonus was particularly abundant in deeper depth and the lower-surface of the panels. More than 15 genera of encrusting bryozoans were obtained in Otsuchi Bay. The diversity of encrusting cheilostome bryozoan genera was highest in summer to autumn; especially abundant at southern inner-part of the bay. Botryllid colonial ascidians were abundant in autumn and early spring; especially abundant at southern and inner-part of the bay. Most sessile organisms tended to be abundant at southern part of the bay, where the outflow of the water current in the bay containing river water strongly affected. In the early spring, macro-algae tended to be abundant and the sessile organisms decreased.
Investigation Item and Data Acquisition
Investigation Item | Data Acquisition |
---|
SCUBA diving | sessile organisms |
Reference
Related Observation Plan
Related Observation Data
Person in charge of Investigation
Representative person | Masato Hirose |
Organization | Atmosphere and Ocean Research Institute, The University of Tokyo |
Department | International Coastal Research Center, Coastal Ecosystem Restoration |
Keywords
Fiscal Year | 2014 |
---|
Organization | Atmosphere and Ocean Research Institute, The University of Tokyo |
---|
Category | Field survey
Mooring system (Observation buoy)
|
---|
Research Area | South Sanriku |
---|
Discipline | Ocean physics -> Water temperature
Ocean physics -> Others
Ocean biology / Ocean ecology -> Biological classification
Ocean biology / Ocean ecology -> Biomass
Ocean biology / Ocean ecology -> Ecology
Ocean biology / Ocean ecology -> Arthropods
Ocean biology / Ocean ecology -> Others
|
---|