Factors controlling the relationship between dissolved organic matter and iron from the forest soil to the sea
| Project/Area Number |
26660127
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Forest science
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| Research Institution | Tokyo Metropolitan University |
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Principal Investigator |
Fukushima Keitaro 首都大学東京, 都市環境科学研究科, 特任助教 (60549426)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 溶存有機物 / 溶存全鉄 / 河川水質 / 森川里海 / EEM-PARAFAC / 腐植様物質 / 汽水域 / 土地利用 / タンパク様物質 / 溶存鉄 / 塩分 / 二価鉄 / 三価鉄 / フルボ酸様物質 |
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| Outline of Final Research Achievements |
Dissolved organic matter (DOM) is of key importance in delivering dissolved iron (DFe) from river to the ocean. In forested watersheds, DFe concentration was positively correlated with the fluorescence intensity of humic-like substances, indicating that DFe and humic substances exhibit the same behavior in the forested streamwater. Moreover, a small, flat swamp existing nearby the streamwater is likely the main source of DFe. The spatial distribution of DOM and DFe from river to the sea were examined to elucidate their controlling factors in the Kesennuma Bay. DOM derived from humic-like substances and DFe increased with an increased proportion of cropland area to total watershed areas. DFe concentrations sharply declined as the salinity in river water increased. The salinity control and solar light irradiation experiment revealed that Fe-binding ligands extracted from cropland soil may have a higher resistance to degradation by sea salt, but be readily decomposed by sun light.
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Report
(4 results)
Research Products
(54 results)
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[Journal Article] Estimation of field soil nitrogen mineralization and nitrification rates using soil N transformation parameters obtained through laboratory incubation2017
Author(s)
Urakawa R, Ohte N, Shibata H, Tateno R, Inagaki Y, Oda T, Toda H, Fukuzawa K, Watanabe T, Hishi T, Oyanagi N, Nakata M, Fukushima K, Nakanishi A
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Journal Title
Ecological Research
Volume: 32
Issue: 2
Pages: 279-285
DOI
NAID
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Sources of uncertainty in estimating stream solute export from headwater catchments at three sites.2015
Author(s)
Yanai RD, Tokuchi N, Campbell JL, Green MB, Matsuzaki E, Laseter SN, Brown CL, Bailey AS, Lyons P, Levine CR, Buso DC, Likens GE, Knoepp JD, Fukushima K.
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Journal Title
Hydrological Processes
Volume: 29
Issue: 7
Pages: 1793-1805
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Ecological Research2015
Author(s)
Urakawa R, Ohte N, Shibata H, Tateno R, Hishi T, Fukushima K, Inagaki Y, Hirai K, Oda T, Oyanagi N, Nakata M, Toda Hayakawa A, Kotani A, Kuroiwa M, Isobe K., Tanaka K, Fukuzawa K, Watanabe T, Tokuchi N, Nakaji T, Saigusa N, Yamao Y, Nakanishi A, Enoki T, Ugawa S, H
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Journal Title
Ecological Research
Volume: 30
Issue: 1
Pages: 1-2
DOI
Related Report
Peer Reviewed
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[Journal Article] Effects of freeze-thaw cycles resulting from winter climate change on soil nitrogen cycling in ten temperate forest ecosystems throughout the Japanese archipelago2014
Author(s)
Urakawa R, Shibata H, Kuroiwa M, Inagaki Y, Tateno R, Hishi T, Fukuzawa K, Hirai K, Toda H, Oyanagi N, Nakata M, Nakanishi A, Fukushima K, Enoki T, Suwa Y.
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Journal Title
Soil Biology & Biochemistry
Volume: 74
Pages: 82-94
DOI
Related Report
Peer Reviewed
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