Development of evaluation protocols on ecological functions of forested catchments for water quality conservation

森林流域水质保护生态功能评价方案的制定

• 批准号: 18380093
• 负责人: OHTE Nobuhito
• 金额: $ 11.6万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18380093/
• 关键词: 森林集水域; 生態系機能; 水質浄化機能; 安定同位体; 微生物生態学; 森林流域; 物質循環

Achievements of this study are summarized as follows:(1) By using newly applied novel method for simultaneous measurements of N and O stable isotope ratios of NO_3^- (microbial denitrifier method), contribution and its mechanisms of atmospherically derived NO_3^- in soil nitrogen dynamics were described.(2) Stable carbon isotope ratio of dissolved organic (DOC) of soil and groundwaters were extensively surveyed, and was able to clarify the mechanisms generating the dissolved organic matter in soil profiles.(3) A long-term simulation model for nitrogen and carbon discharge from forested watersheds were developed with combining a catchment-scale biogeochemical and hydrological models. Using this model, the ecosystem functions for water quality conservation can be evaluated based on the process model for nutrient cycle in the forest ecosystem.

本研究取得的主要成果如下：(1)采用微生物反硝化法同时测定土壤中NO_3~-稳定同位素比值的新方法，阐述了大气来源的NO_3~-在土壤氮素动态变化中的贡献及其机理。(2)广泛调查了土壤和地下水中溶解有机碳的稳定碳同位素比值，阐明了土壤剖面中溶解有机质的生成机制。(3)结合流域尺度的生物地球化学和水文模型，建立了森林流域氮碳排放的长期模拟模型。利用该模型，可以在森林生态系统养分循环过程模型的基础上，对森林生态系统的水质保持功能进行评价。

项目成果

Seasonal patterns of nitrate discharge from forested catchments : Suggestions based on Japanese case studies

森林流域硝酸盐排放的季节性模式：基于日本案例研究的建议

• 发表时间: 2010
• 期刊: Geography Compass (in press)
• 作者: Ohte;N.;N. Tokuchi;M. Fujimoto
• 通讯作者: M. Fujimoto

Effects of hillslope topography on hydrological responses in a weathered granite mountain, Japan: comparison of the runoff response between the valley-head and the side clone

山坡地形对日本风化花岗岩山水文响应的影响：谷头与侧克隆径流响应的比较

• 发表时间: 2008
• 期刊: Hydrological Processes 22
• 作者: Itoh M.;Ohte N.;Koba K.;Sugimoto A.and Tani M.;福田秀志・高山元・井口雅史・柴田叡弌;Fujimoto M. et al.
• 通讯作者: Fujimoto M. et al.

Denitrification activity and relevant bacteria revealed by nitrite reductase gene fraaments in soil of temperate mixed forest

温带混交林土壤亚硝酸还原酶基因片段揭示的反硝化活性及相关细菌

• 发表时间: 2008
• 期刊: Microbes and Environments 23
• 作者: Shibata;E. and Torazawa;Y;Katsuyama C. et al.
• 通讯作者: Katsuyama C. et al.

Impacts of forest defoliation by pine wilt diseases on biogeochemical cycling and streamwater chemistry in a headwater catchment in central Japan, in Advances in Geosciences : Hydrological Sciences, AOGS (Asia Oceania Geosciences Society) publication, edi

松枯病导致的森林落叶对日本中部源头流域的生物地球化学循环和河水化学的影响，载于《地球科学进展：水文科学》，AOGS（亚洲大洋洲地球科学学会）出版物，edi

• 发表时间: 2006
• 期刊: World Scientific, Singapore
• 作者: Ohte;N.;N. Tokuchi;S. Hobara
• 通讯作者: S. Hobara

Methane flux characteristics in forest soils under an East Asian monsoon climate

• DOI: 10.1016/j.soilbio.2008.12.003
• 发表时间: 2009-02
• 期刊: Soil Biology & Biochemistry
• 影响因子: 9.7
• 作者: Masayuki Itoh;N. Ohte;K. Koba