2023 Fiscal Year Final Research Report
Advanced winter flooding paddy field management for the conservation of Sympetrum frequens adapted to dry rice paddies
| Project/Area Number |
19K06296
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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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| Review Section |
Basic Section 41030:Rural environmental engineering and planning-related
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| Research Institution | Fukushima University (2020-2023)
Miyagi University (2019) |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2024-03-31
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| Keywords | アキアカネ / 冬期湛水水田 / 気候変動 / 乾田 / 水管理 |
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| Outline of Final Research Achievements |
Sympetrum frequens eggs overwinter in rice paddies feilds without irrigation water. We conducted an experiment to determine the effects of winter flooding of rice paddies on the eggs of Sympetrum frequens.We found that the synchronized
hatching coefficients of S. frequens and S. infuscatum exposed to flooding were significantly lower than that of the control. There was no significant difference in the hatching rate of S. frequens eggs between the control and any of the inundation treatments.
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| Free Research Field |
農業農村工学、水田生態工学
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| Academic Significance and Societal Importance of the Research Achievements |
水田の象徴種とも言えるアキアカネの全国的な減少傾向が進んでいる。本研究により、環境保全効果の高いとされる冬期湛水水田が、本来は非かんがい期に水の無い状態の水田を生息環境とするアキアカネの卵には影響を及ぼすことが明らかになった。孵化の斉一性の低下は、水田の水管理の影響を受けて水田から羽化ができない状態を招く恐れがある。アキアカネ保全に有効な冬期湛水水田のあとの水田栽培管理を考える必要がある。
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