2003 Fiscal Year Final Research Report Summary
Effect of volcanic activities on the terrestrial ecosystem of Miyake-Jima Island and the recovery process after the eruption
| Project/Area Number |
13440229
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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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| Research Field |
生態
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| Research Institution | The University of Tokyo |
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Principal Investigator |
HIGUCHI Hiroyoshi The University of Tokyo, Graduate School of Agricultural and Life Sciences, Professor, 大学院・農学生命科学研究科, 教授 (10111486)
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| Co-Investigator(Kenkyū-buntansha) |
HASEGAWA Masami Toho University, Graduate School of Science, Associate Professor, 大学院・理学研究科, 助教授 (40250162)
KATOH Kazuhiro The University of Tokyo, Graduate School of Agricultural and Life Sciences, Associate Professor, 大学院・農学生命科学研究科, 助教授 (60242161)
TSUNEKAWA Atsushi The University of Tokyo, Graduate School of Agricultural and Life Sciences, Associate Professor, 大学院・農学生命科学研究科, 助教授 (60227452)
KAMIJO Takashi The University of Tsukuba, Institute of Agriculture and Forestry, Lecturer, 農林学系, 講師 (10301079)
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| Project Period (FY) |
2001 – 2003
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| Keywords | Miyake-jima Island / Volcano / Eruption / Stem sprouting / Species richness |
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| Research Abstract |
In July-August 2000, serious volcanic irruptions occurred on Miyake-jima Island of the Izu Islands. Large crater appeared on top of the island, a lot of ashes fell on the vegetation and ground, and landslides occurred here and there. Even now, May 2004, three and a half years after the irruption, a huge amount of gas is coming out from the crater. We studied the effect of the irruption and continuing volcanic activity on the flora and fauna of the island. It was shown that vegetation disappeared from the upper one third of the island and few animals inhabited there. In middle height of the island, greater damage of flora and fauna was found in higher area. Along the sea coast, vegetation was not damaged to large extent, and animals such as birds were found in species richness and population density similar to those before irruption. After the irruption, young leaves appeared directly from the trunks of some tree species, but some of them died through later gas spouting. There was a remarkable difference in the resistance to gas spouting between different tree species. Some particular fern and sedge plant species became dominant in some heavily damaged areas.
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