2013 Fiscal Year Final Research Report
Why water source separation is achieved between coexisting species?
| Project/Area Number |
23540508
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | University of Tsukuba |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2013
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| Keywords | 生態水文学 / 同位体 / 数値シミュレーション / 根系吸水 / 水源分化 / 種間競合 |
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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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