2012 Fiscal Year Final Research Report
Factors determining stream nitrate concentration and nitrogen loss in Japanese forest ecosystems: toward a better prediction of nitrogen saturation
| Project/Area Number |
22780145
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Forest science
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| Research Institution | Kyoto University |
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Principal Investigator |
FUKUSHIMA Keitaro 京都大学, フィールド科学教育研究センター, 特定研究員 (60549426)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 森林集水域 / 渓流水質 / 窒素飽和 / 硝酸態窒素 / 広域比較 / 土壌窒素動態 |
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| Research Abstract |
This study aimed to elucidate the factors controlling stream nitrate concentration and its seasonality, and annual nitrogen loss in several forested watersheds with various climatic conditions. Nitrate concentration in streamwater was not related with annual rainfall and atmospheric nitrogen deposition, while its seasonality was controlled by rainfall and snowfall pattern. Simulating nitrogen cycling and loss using PnET -CN model, which was developed in northern America and modified with data collected in this study, revealed that not only hydrological processes, but also land use history until at least 100 years can be important for more precise prediction of nitrogen loss.
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Research Products
(45 results)
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[Journal Article] Nematomorph parasites indirectly alter the food web and ecosystem function of streams through behavioral manipulation of their cricket hosts2012
Author(s)
Sato T, Egusa T, Fukushima K, Oda T, Ohte N, Tokuchi N, Watanabe, K, Kanaiwa M,Murakami I, Lafferty KD
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Journal Title
Ecology Letters
Volume: 15
Pages: 786-793
Peer Reviewed
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[Presentation] Gradual changes in stream nitrate discharge along with nitrogen deposition, forest biomass and productivity in a headwater catchment of a natural cool-temperate forest2012
Author(s)
Fukushima, K., Nakashima, T., Fujiki, Y., Nakamura, S., Koide, K., Yamanaka, N, Tokuchi, N., Oohata, S
Organizer
5th EAFES
Place of Presentation
Shiga, Japan
Year and Date
2012-03-20
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[Presentation] Deer over-browsing of forest understory vegetation alters the pattern of nitrate loss to streamwater in forested watersheds in Ashiu, Japan2011
Author(s)
Fukushima, K., Sakai, M., Sakaguchi, S., Iwai, Y., Hasegawa, A., Nishioka, Y., Fujii, H., Tokuchi, N., Yoshioka, T., Takayanagi, A
Organizer
B13G-0649.44th AGU Fall Meeting 2011
Place of Presentation
San Francisco, USA
Year and Date
2011-12-05
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