2014 Fiscal Year Final Research Report
Analysis of pioneer microbial community and vegetation recovery in the volcanic deposits from the Miyake-jima 2000 eruption
| Project/Area Number |
24310003
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Ibaraki University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
NARISAWA Kazuhiko 茨城大学, 農学部, 教授 (90431650)
KAMIJO Takashi 筑波大学, 大学院生命環境科学研究科, 教授 (10301079)
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| Co-Investigator(Renkei-kenkyūsha) |
NANBA Kenji 福島大学, 共生システム理工学類, 教授 (70242162)
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| Research Collaborator |
GUO Yong 東京農工大学, 大学院連合農学研究科
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 土壌微生物 / 三宅島2000年噴火 / 植生遷移 / エンドファイト / リボソームRNA遺伝子 / 微生物遷移 / 荒廃地再生 |
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| Outline of Final Research Achievements |
Volcanic eruptions offer great opportunities for understanding of terrestrial ecosystem formation. In this study, we investigated the 2000 eruption-affected sites and analyzed the newly exposed volcanic substrates in the island of Miyake. Our results showed that iron-oxidizing chemolithoautotrophic bacteria were pioneer microbes and played an important role in the input of carbon and nitrogen from the atmosphere. We identified Miscanthas condensatus as a major pioneer plant after the 2000 eruption. The rhizosphere bacterial community of this plant was predominated by Beta- and Gammaproteobacteria and gradually replaced by Alphaproteobacteria and Actinobacteria in response to the increase in the plant cover percentage. Bradyrhizobium, Rhizobium, Granulicella, and Arthrobacter were assumed as key microbes in the pioneer plant colonization. In conclusion, our study revealed the relationships between soil formation, vegetation development, and microbial community structure.
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| Free Research Field |
環境毒性化学
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