Effect of ocean acidification on production of sinking particles

Research Project

Project/Area Number	25870095
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Environmental dynamic analysis Environmental impact assessment
Research Institution	University of Tsukuba
Principal Investigator	WADA Shigeki 筑波大学, 生命環境系, 助教 (60512720)
Project Period (FY)	2013-04-01 – 2016-03-31
Project Status	Completed (Fiscal Year 2015)
Budget Amount *help	¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000) Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000) Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000) Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords	海洋酸性化 / 生物ポンプ / 沈降粒子 / 植物プランクトン
Outline of Final Research Achievements	The second CO2 problem; ocean acidification will have various effects on marine ecosystems. If biological pump which is a carbon sequestration mechanism is affected, feedback to progress of ocean acidification is expected. Therefore, we carried out mesocosm experiments which is closed vessel with large volume with manipulation of pH. As a result, production of sinking particles wouold decrease due to ocean acidification, and the mechanism would be a shift of phytoplankton community structure into a dominance of small-sized microalgae. The decrease in the production of sinking particles will result in acceleration of ocean acidification.