2023 Fiscal Year Final Research Report
Adaptive significance of morphologically complex flowers in natural grassland communities
| Project/Area Number |
19H03303
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 45040:Ecology and environment-related
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| Research Institution | Kobe University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
石井 博 富山大学, 学術研究部理学系, 教授 (90463885)
岡本 朋子 岐阜大学, 応用生物科学部, 准教授 (50588150)
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | 複雑花 / 進化 / 送粉者 / 開花密度 / 送粉成功 |
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| Outline of Final Research Achievements |
In this study, data on corolla tube length and flower color of entomophilous plants were obtained in the Sugadaira Highland, and analyzed together with data from five other survey sites. In plant communities with frequent visitation by large bees (e.g.,bumblebees) and butterflies, complex flowers were more abundant. In complex flowers, large bees with strong flower constancy visited more frequently in the field, while simple flowers were more frequently visited by moderately constant bees such as honeybees and small bees. For several simple flowers, the visitation frequency of pollinators and pollen receipt increased with increasing conspecific floral density. On the other hand, for complex flowers, conspecific floral density did not affect the visitation frequency of pollinators or pollen receipt. Overall, our results support the hypothesis that complex flowers have the advantage of stable reproduction even with low conspecific floral density, due to specialization of pollinators.
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| Free Research Field |
植物生態学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で取り組んだ課題は、総説論文等で繰り返し議論された重要性な課題であるが、野外における実証研究は非常に少なかった。本研究は、申請者らが長年蓄積してきたデータに新データを加えた新しいデータセットで花形質と送粉者相の解析を定量的に行い、曖昧な議論がなされてきた仮説の頑強性について検討できた。まず、野外においてマルハナバチ類が小型ハナバチやハナアブに比べて定花性が高いことを定量的に示した点は新規性が高い。さらに、複雑花が低密度環境下でも安定した送粉成功を得ることができる点を複数の種を比較しながら明らかにした点も、送粉生態学の重要課題を解くのに必要な成果を得ることができた
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