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Nonlinear responses of ecosystem carbon fluxes and water-use efficiency to nitrogen addition in Inner Mongolia grassland
Tian, Dashuan1; Niu, Shuli1; Pan, Qingmin; Ren, Tingting; Chen, Shiping; Bai, Yongfei; Han, Xingguo2
2016
发表期刊FUNCTIONAL ECOLOGY
ISSN0269-8463
卷号30期号:3页码:490-499
摘要1. Nitrogen (N) deposition is a continuous process and likely to affect ecosystem carbon (C) and water fluxes in a nonlinear way. However, experimental evidence is still lacking because most previous studies on these impacts usually used two discrete levels of N treatment. 2. By a 12-year, 6-level N addition experiment in Inner Mongolia grassland, we found that the responses of C fluxes, including net ecosystem carbon exchange (NEE), gross ecosystem productivity (GEP), ecosystem respiration (ER), all exhibited nonlinear patterns with increasing N addition rate while that of evapotranspiration did not significantly change. As a result, the response of ecosystem water-use efficiency (EWUE) followed a similar pattern with NEE. 3. These N-induced changes in C fluxes were greatly affected by the distribution of precipitation among different stages of growing seasons and mainly driven by the alterations in biomass production rather than soil temperature and soil moisture. 4. This study highlights the importance of the nonlinearity of N addition impacts on ecosystem C fluxes, which should be incorporated into the global-C-cycling models for better predicting future C balance. Our results also have implications for the use of fertilization in restoring the degraded grasslands given that N addition can promote biomass production and ecosystem C uptake without additional water evapotranspiration but also change ecosystem composition.
关键词ecosystem carbon balance nitrogen deposition precipitation pattern saturation response threshold response water flux
学科领域Ecology
DOI10.1111/1365-2435.12513
收录类别SCI
语种英语
WOS关键词SEMIARID GRASSLAND ; FOREST ECOSYSTEMS ; EXCHANGE ; VEGETATION ; CO2 ; SEQUESTRATION ; EXPOSURE ; PULSES
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号WOS:000372949000016
出版者WILEY
文献子类Article
出版地HOBOKEN
EISSN1365-2435
资助机构Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [30970496, 31430016] ; Knowledge Innovation Program of the Chinese Academy of SciencesChinese Academy of SciencesKnowledge Innovation Program of the Chinese Academy of Sciences [KSCX2-EW-Z-5]
作者邮箱pqm@ibcas.ac.cn
作品OA属性Bronze, Green Published
引用统计
被引频次:65[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ibcas.ac.cn/handle/2S10CLM1/25199
专题植被与环境变化国家重点实验室
作者单位1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110016, Peoples R China
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GB/T 7714
Tian, Dashuan,Niu, Shuli,Pan, Qingmin,et al. Nonlinear responses of ecosystem carbon fluxes and water-use efficiency to nitrogen addition in Inner Mongolia grassland[J]. FUNCTIONAL ECOLOGY,2016,30(3):490-499.
APA Tian, Dashuan.,Niu, Shuli.,Pan, Qingmin.,Ren, Tingting.,Chen, Shiping.,...&Han, Xingguo.(2016).Nonlinear responses of ecosystem carbon fluxes and water-use efficiency to nitrogen addition in Inner Mongolia grassland.FUNCTIONAL ECOLOGY,30(3),490-499.
MLA Tian, Dashuan,et al."Nonlinear responses of ecosystem carbon fluxes and water-use efficiency to nitrogen addition in Inner Mongolia grassland".FUNCTIONAL ECOLOGY 30.3(2016):490-499.
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