Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR021592 |
Using High-Resolution Data to Assess Land Use Impact on Nitrate Dynamics in East African Tropical Montane Catchments | |
Jacobs, Suzanne R.1,2,3,4; Weeser, Bjoern3,5; Guzha, Alphonce C.6; Rufino, Mariana C.2,7; Butterbach-Bahl, Klaus1,4; Windhorst, David3; Breuer, Lutz3,5 | |
2018-03-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:3页码:1812-1830 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Kenya; England |
英文摘要 | Land use change alters nitrate (NO3-N) dynamics in stream water by changing nitrogen cycling, nutrient inputs, uptake and hydrological flow paths. There is little empirical evidence of these processes for East Africa. We collected a unique 2 year high-resolution data set to assess the effects of land use (i.e., natural forest, smallholder agriculture and commercial tea plantations) on NO3-N dynamics in three subcatchments within a headwater catchment in the Mau Forest Complex, Kenya's largest tropical montane forest. The natural forest subcatchment had the lowest NO3-N concentrations (0.44 +/- 0.043 mg N L-1) with no seasonal variation. NO3-N concentrations in the smallholder agriculture (1.09 +/- 0.11 mg N L-1) and tea plantation (2.13 +/- 0.19 mg N L-1) subcatchments closely followed discharge patterns, indicating mobilization of NO3-N during the rainy seasons. Hysteresis patterns of rainfall events indicate a shift from subsurface flow in the natural forest to surface runoff in agricultural subcatchments. Distinct peaks in NO3-N concentrations were observed during rainfall events after a longer dry period in the forest and tea subcatchments. The high-resolution data set enabled us to identify differences in NO3-N transport of catchments under different land use, such as enhanced NO3-N inputs to the stream during the rainy season and higher annual export in agricultural subcatchments (4.9 +/- 0.3 to 12.0 +/- 0.8 kg N ha(-1) yr(-1)) than in natural forest (2.6 +/- 0.2 kg N ha(-1) yr(-1)). This emphasizes the usefulness of our monitoring approach to improve the understanding of land use effects on riverine N exports in tropical landscapes, but also the need to apply such methods in other regions. |
英文关键词 | tropical native forest annual crops grazing Lake Victoria basin tropical soils |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430364900023 |
WOS关键词 | HIGH-FREQUENCY WAVE ; WATER-QUALITY ; ORGANIC-CARBON ; LAKE VICTORIA ; NUTRIENT CONCENTRATIONS ; DISSOLVED NITROGEN ; FOREST ECOSYSTEM ; LOAD ESTIMATION ; SOLUTE EXPORT ; KENYA |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21851 |
专题 | 资源环境科学 |
作者单位 | 1.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, Atmospher Environm Res KIT IMK IFU, Garmisch Partenkirchen, Germany; 2.Ctr Int Forestry Res CIFOR, Nairobi, Kenya; 3.Justus Liebig Univ, Inst Landscape Ecol & Resources Management ILR, Giessen, Germany; 4.Int Livestock Res Inst, Mazingira Ctr, Nairobi, Kenya; 5.Justus Liebig Univ, Ctr Int Dev & Environm Res ZEU, Giessen, Germany; 6.US Forest Serv, Int Programs, Nairobi, Kenya; 7.Univ Lancaster, Lancaster Environm Ctr, Lancaster, England |
推荐引用方式 GB/T 7714 | Jacobs, Suzanne R.,Weeser, Bjoern,Guzha, Alphonce C.,et al. Using High-Resolution Data to Assess Land Use Impact on Nitrate Dynamics in East African Tropical Montane Catchments[J]. WATER RESOURCES RESEARCH,2018,54(3):1812-1830. |
APA | Jacobs, Suzanne R..,Weeser, Bjoern.,Guzha, Alphonce C..,Rufino, Mariana C..,Butterbach-Bahl, Klaus.,...&Breuer, Lutz.(2018).Using High-Resolution Data to Assess Land Use Impact on Nitrate Dynamics in East African Tropical Montane Catchments.WATER RESOURCES RESEARCH,54(3),1812-1830. |
MLA | Jacobs, Suzanne R.,et al."Using High-Resolution Data to Assess Land Use Impact on Nitrate Dynamics in East African Tropical Montane Catchments".WATER RESOURCES RESEARCH 54.3(2018):1812-1830. |
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