2016 Fiscal Year Final Research Report
Assessing the effects of anthropogenic aerosols on lake ecosystems located in the central and southwest Japan during the past 100 years using paleolimnological approaches
| Project/Area Number |
26340007
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | 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 | Matsuyama University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
AGUSA Tetsuro 熊本県立大学, 環境資源学科, 准教授 (50403853)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 近過去 / 湖沼 / 古陸水学 / プランクトン / 人為起源エアロゾル / アジア / 環境影響評価 / 球状炭化粒子 |
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| Outline of Final Research Achievements |
Paleolimnological studies using sediment cores were carried out to assess the effects of anthropogenic aerosols on mountain lake ecosystems from the central to southwest Japan. In the Lake Shirakoma and Lake Odano, plankton biomasses increased around since the 1990s. In Lake Odano, the concentration of sedimentary SCPs (spheroidal carbonaceous particles) derived from fossil fuel combustion also increased around the 1990s, which indicates that coal combustion dust further expanded into this mountain area around that time. Additionally, sedimentary values of δ15N in this lake prominently decreased around since the 1990s. No continuous changes were detected in watershed and climate conditions around the lake at this time. All these results and previous studies suggest the increase of anthropogenically produced dust may impart damaging impacts on pristine mountain lakes in a wide area from Kyushu to Tohoku even if they are protected in national parks.
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| Free Research Field |
古陸水学・古海洋学
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