2013 Fiscal Year Final Research Report

Seasonal variability of phytoplankton distribution and size composition in the Indian sector of Southern Ocean

Research Project

Project/Area Number	23510019
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Environmental dynamic analysis
Research Institution	National Institute of Polar Research
Principal Investigator	ODATE Tsuneo 国立極地研究所, 研究教育系, 教授 (60224250)
Project Period (FY)	2011 – 2013
Keywords	植物プランクトン / サイズ組成 / 南大洋インド洋区 / 季節変動
Research Abstract	The chlorophyll-a concentration was 0.3-0.5mgm-3 in the subantarctic zone (40S-50S). The dominant size of phytoplankton was pico size phytoplankton (< 10um). In the polar frontal zone (50S-60S), the chlorophyll-a concentration increased to 0.4-0.6 mgm-3, but dominated phytoplankton was almost pico size phytoplankton. In the Antarctic divergence area (60S to 65S), chlorophyll a concentration increased to 0.6-0.8 mgm-3, and dominated nano size phytoplankton (>10um). These phytoplankton distribution and composition have been uniform in the same region in spite of the different season. These results should be useful for to establish the future monitoring strategy in the Indian sector of southern ocean.

(4 results)