| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2020: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2019: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2018: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2017: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Outline of Final Research Achievements |
To clarify the changes in the forest ecosystem with invasion and eradication of invasive tree species based on “Novel ecosystem” concept, we focused on the combination of water cycle and community structure in the ecosystem. We evaluated effects of dominance of a nonnative tree, Casuarina equisetifolia on soil water environments. We compared the relationship between community structure and the soil water environment with a combination of dominance of C. equisetifolia and presence of its eradication.
Results of the study suggested that the invasion of C. equisetifolia would reduce the surface soil water contents through the acceleration of the loss of water from the soil with drought. In addition, it was suggested that the invasion and eradication of C. equisetifolia greatly altered the soil water environment and plant community composition, and the possibility that the eradication did not necessarily return to the pre-invasion state.
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