Coupling of element cycling based on element distribution and microbial metabolism in the eutrophic lake watershed facing sea
| Project/Area Number |
26281011
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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 | Akita Prefectural University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
村野 宏達 名城大学, 農学部, 准教授 (00570798)
浅野 亮樹 東北大学, 農学研究科, 教育研究支援者 (20646137)
石川 祐一 秋田県立大学, 生物資源科学部, 准教授 (60315603)
日高 伸 秋田県立大学, 生物資源科学部, 教授 (60457760)
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000)
Fiscal Year 2016: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2014: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
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| Keywords | 生物地球化学 / 微生物生態 / 硫黄脱窒 / 海成堆積岩 / 酸化還元 / リン動態 / 硫化物 / イオン交換反応 / 地下水リン動態 / 形態別硫黄 / 細菌群集構造 / リン循環 / リン溶出メカニズム / 窒素循環 / 高濃度リン / 海水‐淡水相互作用 / 硫黄安定同位体 / 地下水リン / カップリング |
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| Outline of Final Research Achievements |
・We detected sulfur denitrification signal and the sulfur oxidizing bacteria in the sulfide rich soil layer in the headwater catchment with marine sedimentary rock area in the western part of Akita.
・SRP (soluble reactive phosphorus) concentration in stream water was significantly higher in marine sedimentary rock catchments (23 μg/L, n=66) than those in igneous rock catchments (8 μg/L, n=55). The marine sedimentary rock area in the western part of Akita was revealed to be a source of phosphorus in stream water in the headwater catchments.
・Water quality of the ground water that detected high SRP concentration in Hachirogata reclaimed land was NaHCO3 type. As a result of 3 years field monitoring, SRP concentration had a clear cyclic variation that increased from spring to summer and decreased in winter. The inflow of lake water (freshwater) to the groundwater was expected to be a trigger of the cyclic variation of SRP concentration.
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Report
(5 results)
Research Products
(20 results)
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[Journal Article] Spatial and temporal variation in nutrients in water and riverbed sediments at the mouths of rivers that enter Lake Hachiro, a shallow eutrophic lake in Japan.2015
Author(s)
Hayakawa, A., Ikeda, S., Tsushima, R., Ishikawa, Y., Hidaka, S.
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Journal Title
Catena
Volume: 133
Pages: 486-494
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Presentation] Catchment topography and the distribution of electron donors for denitrification control the concentration of nitrate in headwater streams of the Lake Hachiro watershed2016
Author(s)
Hayakawa, A., Funaki, Y., Sudo, T., Asano, R., Watanabe, S., Ishikawa, Y., Hidaka, S.
Organizer
INI2016 7th International Nitrogen Initiative Conference
Place of Presentation
Melbourne Cricket Ground, Melbourne, Australia
Year and Date
2016-12-04
Related Report
Int'l Joint Research
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[Presentation] Investigation of analysis methods for sulfur compounds and their isotopic compositions in soils and sediments2016
Author(s)
Murano, H., Yamano, Y., Suzuki, N., Yasuda, R., Asano, R., Hayakawa, A., Isoi, T.
Organizer
GOLDSCHMIDT
Place of Presentation
Pacifico Yokohama, Yokohama, Japan
Year and Date
2016-06-26
Related Report
Int'l Joint Research
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[Presentation] Investigation of analysis methods for sulfur compounds and their isotopic compostions in soils and sediments2016
Author(s)
MURANO, H., YAMANO, Y., SUZUKI, N., YASUDA, M., ASANO, R., HAYAKAWA, A., ISOI, T.
Organizer
Goldschmidt Conference
Place of Presentation
横浜市
Year and Date
2016-06-26
Related Report
Int'l Joint Research
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