|Budget Amount *help
¥127,010,000 (Direct Cost: ¥97,700,000、Indirect Cost: ¥29,310,000)
Fiscal Year 2012: ¥18,460,000 (Direct Cost: ¥14,200,000、Indirect Cost: ¥4,260,000)
Fiscal Year 2011: ¥20,800,000 (Direct Cost: ¥16,000,000、Indirect Cost: ¥4,800,000)
Fiscal Year 2010: ¥21,840,000 (Direct Cost: ¥16,800,000、Indirect Cost: ¥5,040,000)
Fiscal Year 2009: ¥23,530,000 (Direct Cost: ¥18,100,000、Indirect Cost: ¥5,430,000)
Fiscal Year 2008: ¥42,380,000 (Direct Cost: ¥32,600,000、Indirect Cost: ¥9,780,000)
To estimate the impacts of deep-sea hydrothermal activity (TAIGA), we quantified the chemical, biological, and ecological parameters of deep-sea hydrothermal plume in time and space. We developed in situ sensors, water sampler, and acoustic survey methods to observe the plume. These methods were applied at the 18 hydrothermal area using research vessels with AUV, ROV, submersible, or wired deep-tow. We found the strong positive correlation between microbial community structures and hydrothermal chemical compositions, which validate the evidence for ‘4 types of TAIGA hypothesis’. We developed the methods to measure the primary production of microbes in deep-sea and estimate the primary production rate in the plume. We found the evidence that the microbial primary production affected the zooplankton in deep sea by stable isotopic analysis.