2019 Fiscal Year Final Research Report
Effects of climate and geomorphological changes on the formation and development of mountain wetlands
| Project/Area Number |
19K20842
|
|---|
| Project/Area Number (Other) |
18H05636 (2018)
|
|---|
| Research Category |
Grant-in-Aid for Research Activity Start-up
|
| Allocation Type | Multi-year Fund (2019)
Single-year Grants (2018) |
|---|
| Review Section |
0104:Geography, cultural anthropology, folklore, and related fields
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
Sasaki Natsuki 東京大学, 大学院新領域創成科学研究科, 助教 (40823381)
|
|---|
| Project Period (FY) |
2018-08-24 – 2020-03-31
|
| Keywords | 涵養水 / 土壌水分 / 湿地形成年代 / 気候変動 / 地形変化 / 大規模地すべり地 |
|---|
| Outline of Final Research Achievements |
Mountain wetlands in the Hachimantai volcanic area were classified into three types: snow patch type wetlands, local flat-inflow type wetlands, and landslide wetlands, then the soil moisture variation throughout the year were clarified by observation, and the relationship between development processes of wetlands and climate change were examined from sediment analysis. The snow patch type wetlands are recharged mainly by meteoric water, and the supply of snowmelt water, which continues until mid-June, played an important role in maintaining wetlands. Formation of the wetlands was affected by centennial-to-millennial scale climate change. The other two are recharged by groundwater in addition to meteoric water, and they survived for a longer period than the snow patch type. In particular, development processes and rates of landslide wetlands varied among the wetlands within the same large-scale landslide, controlled by local topographical stability after the initial landslide activity.
|
| Free Research Field |
自然地理学
|
| Academic Significance and Societal Importance of the Research Achievements |
山岳湿地の存在は山岳地域の生物多様性に貢献し，生態学的に価値が高いことが認識されつつある．さらに，近年の気候変動が山岳環境に与える影響が懸念され，脆弱性が高いとされる山岳湿地が，過去の気候変動に対してどのように応答してきたかを明らかにし，湿地動態の将来予測をおこなうことは喫緊の課題である．本研究は，八幡平火山地域の山岳湿地を対象に，湿地周辺の地形，気候，水文環境を含む一つの系で自然環境を包括的に捉えて，湿地の外的変化への応答性を評価した．気候変動による生態系への影響を検討するための基礎情報を与える研究である．
|
