Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL072867 |
Global bounds on nitrogen gas emissions from humid tropical forests | |
Brookshire, E. N. J.1; Gerber, S.2; Greene, W.1; Jones, R. T.3; Thomas, S. A.4 | |
2017-03-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Denitrification and hydrologic leaching are the two major pathways by which nitrogen (N) is lost from the terrestrial biosphere. Humid tropical forests are thought to dominate denitrification losses from unmanaged lands globally, but there is large uncertainty about the range and key drivers of total N gas emissions across the biome. We combined pantropical measures of small watershed stream chemistry with ecosystem modeling to determine total N gas losses and associated uncertainty across humid tropical forests. Our calculations reveal that denitrification in soils and along hydrologic flow paths contributes on average >45% of total watershed N losses. However, when denitrification occurs exclusively in shallow soils, simulations indicate that gas emissions would exceed N inputs and render plants severely N limited, which contradicts observations of widespread N sufficiency in tropical forests. Our analyses suggest an upper bound on soil denitrification of similar to 80% of total external N losses beyond which tropical plant growth would be compromised. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398183700051 |
WOS关键词 | RAIN-FORESTS ; TERRESTRIAL ECOSYSTEMS ; INORGANIC NITROGEN ; CARBON SINK ; PATTERNS ; LOSSES ; CYCLE ; DENITRIFICATION ; FIXATION ; SOIL |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/27896 |
专题 | 气候变化 |
作者单位 | 1.Montana State Univ, Dept Land Resources & Environm Sci, Bozeman, MT 59717 USA; 2.Univ Florida, Dept Soil & Water Sci, Gainesville, FL USA; 3.Ctr Large Landscape Conservat, Bozeman, MT USA; 4.Univ Nebraska Lincoln, Sch Nat Resources, Lincoln, NE USA |
推荐引用方式 GB/T 7714 | Brookshire, E. N. J.,Gerber, S.,Greene, W.,et al. Global bounds on nitrogen gas emissions from humid tropical forests[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(5). |
APA | Brookshire, E. N. J.,Gerber, S.,Greene, W.,Jones, R. T.,&Thomas, S. A..(2017).Global bounds on nitrogen gas emissions from humid tropical forests.GEOPHYSICAL RESEARCH LETTERS,44(5). |
MLA | Brookshire, E. N. J.,et al."Global bounds on nitrogen gas emissions from humid tropical forests".GEOPHYSICAL RESEARCH LETTERS 44.5(2017). |
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