2022 Fiscal Year Final Research Report
Inter-island avian seed dispersal in an oceanic archipelago
Project/Area Number |
19K15859
|
Research Category |
Grant-in-Aid for Early-Career Scientists
|
Allocation Type | Multi-year Fund |
Review Section |
Basic Section 39060:Conservation of biological resources-related
|
Research Institution | National Institute for Environmental Studies |
Principal Investigator |
Ando Haruko 国立研究開発法人国立環境研究所, 生物多様性領域, 主任研究員 (70761063)
|
Project Period (FY) |
2019-04-01 – 2023-03-31
|
Keywords | 種子散布 / 鳥類 |
Outline of Final Research Achievements |
It is known that the flight ability of birds is reduced in isolated islands. However, a comparison of the population genetic structure and wing morphology of Japanese wood pigeons inhabiting the Izu and Ogasawara Islands showed that higher flight ability was maintained in the more isolated Ogasawara Islands than in the Izu Islands. Japanese wood pigeons actually move between islands in their habitat, and their inter-island movement patterns are related to food use and breeding seasons in their habitat, suggesting that their behavior is adapted to the various island environments of their habitat. The inter-island movements of the frugivore pigeons were also shown to result in long-distance seed dispersal, suggesting that inter-island movements play an important role in the island ecosystems.
Translated with www.DeepL.com/Translator (free version)
|
Free Research Field |
島嶼生物学
|
Academic Significance and Societal Importance of the Research Achievements |
島嶼の生物を対象とするこれまでの研究では、本土から隔離されることに伴う適応進化や種分化が扱われることが多かった。しかし本研究では、列島という地理的構造に着目し、本土から隔離された環境であっても、列島内の多様な島々を移動する能力を維持するという、鳥類の新しい島嶼適応の形を見出した。さらに、鳥類の島間移動が植物の移動分散に貢献し、島嶼における生態系の構成上、重要な役割を果たすことを明らかにした。これらの成果は、島嶼生物学の枠組みを捉え直すという点で学術的意義が大きく、同時に様々な島嶼環境から成る日本の地理的特性を活かした研究発展が期待される。
|