| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2011: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Research Abstract |
In order to reveal mechanisms of "water source separation" between coexisting species and to establish a method to obtain reliable estimate of water uptake profile of plants, investigations were made at a pure forest of Japanese cypress and a mixed forest of Japanese red pine and Japanese white oak. As a result, it was shown that a combined use of isotopic tracer and numerical model enables us to reliably estimate water uptake profile. In addition, it is concluded that water separation is achieved to avoid reduction of water use efficiency as a whole ecosystem when soil water is not enough to meet demand of plants. Initial profiles of root density and transpiration rates of competing species affect patterns of water separation.
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