| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
We determined the carbon and nitrogen isotopic ratios and the concentrations of 12 elements (Mg, P, Ca, V, Mn, Fe, Zn, As, Rb, Sr, Cd, Ba) in seaweeds from Japan (Sanriku and Naruto), China, and South Korea to compare the ecological characteristics in each area. In addition, we collected seaweeds in the same area from 2011 to 2013 and evaluated interannual variations of their stable-isotope ratio and trace-element. The wakame seaweeds from Sanriku, the coastline along northeast Japan, had relatively lower concentrations of all elements. Although the Sanriku area was damaged by the tsunami caused by the massive earthquake on March 11, 2011, there was no significant difference in the stable isotope values and trace element compositions of Sanriku seaweeds before and after the earthquake. On the basis of the carbon and nitrogen isotopic ratios along with the concentrations of the 12 elements, the wakame seaweeds were divided into four groups: Sanriku, Naruto, China, and South Korea.
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