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2022 Fiscal Year Final Research Report

Effects of land use history on vegetation through changes in symbiosis microbial communities.

Research Project

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Project/Area Number 19K06095
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 39060:Conservation of biological resources-related
Research InstitutionToho University

Principal Investigator

Shimono Ayako  東邦大学, 理学部, 准教授 (30401194)

Co-Investigator(Kenkyū-buntansha) 大和 政秀  千葉大学, 教育学部, 教授 (00571788)
Project Period (FY) 2019-04-01 – 2023-03-31
Keywordsアーバスキュラー菌 / 半自然草原 / 時間的連続性 / 土地利用の履歴 / メタゲノム
Outline of Final Research Achievements

The mature grassland is considered one of the most biodiverse terrestrial ecosystems. Once grasslands are destroyed or degraded, biodiversity recovery may require decades to centuries. One of the mechanisms controlling the diversity and composition of plant communities is the interaction between plants and arbuscular mycorrhizal fungi (AMF).
The old grasslands harbored higher diversity of AMF than new grasslands and the OTU compositions were significantly different between old and new grasslands. The significant effect of land-use history, rather than host-plant differences, was detected to explain the change in AMF composition. Furthermore, The covariation of plant-AMF communities was stronger in the old grasslands than in new grasslands.
Habitat temporal continuity may promote the accumulation of host species and symbiont AMF diversity and strengthen the symbiont interaction.

Free Research Field

植物生態学

Academic Significance and Societal Importance of the Research Achievements

草原を新たに再生しようとしても、本来の草原とは異なる植生が成立することから、土地利用の履歴が長期にわたり植生に影響を与えることが指摘されてきた。
本研究は、地域特異性が低く分散しやすいと考えられていたAMFも土地利用の履歴が長期にわたり影響を与えることを示した先駆的研究である。またAMFは植物群集と共変動しており、生育地の時間的連続性が長いほど、その共変性の程度が強かった。AMFは宿主特異性が低いことが知られているにも関わらず、AMFの多様性や組成は植生の変化においても重要な要因となっている可能性を示し、今後の草原生態系の保全において基盤となる知見を提供した。

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Published: 2024-01-30  

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