| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Research Abstract |
To examine whether plants change nitrogen sources during boreal forest succession, I measured nitrogen isotopic signatures of plants and soil nitrogen across two chronosequences of time frame of approximately 400 years and 5000 years in northern Sweden. I found that the nitrogen isotopic signatures significantly changed along the forest succession. Based on the preliminary results on nitrogen isotope ratios of dissolved nitrogen sources in soil, these results suggest that the importance of dissolved organic nitrogen, biological nitrogen fixation by mosses, and nitrogen derived from mycorrhizal fungi as plant nitrogen source change along the forest succession.
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