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Diverse responses of belowground internal nitrogen cycling to increasing aridity
Kou, Dan1; Peng, Yunfeng; Wang, Guanqin1; Ding, Jinzhi1; Chen, Yongliang; Yang, Guibiao1; Fang, Kai1; Liu, Li1; Zhang, Beibei; Mueller, Christoph2,3; Zhang, Jinbo4; Yang, Yuanhe1
AbstractBelowground microbial nitrogen (N) processes play key roles in regulating terrestrial ecosystem services such as vegetation production, however, our understanding of their responses to climate change remains limited. We determined patterns and controls of five gross N transformation processes along a typical aridity gradient on the Tibetan Plateau. Potential gross N transformation rates responded diversely to the changing aridity. Both mineralization (M-N, average rate: 2.87 mg N kg(-1) soil d(-1)) and ammonium inunobilization (I-NH4, 3.35 mg N kg(-1) soil d(-1)) declined as aridity increased. Autotrophic nitrification (O-NH4, 1.72 mg N kg(-1) soil d(-1)) exhibited a bell-shaped pattern along the gradient, with an optimum aridity of 0.53 (1- aridity index (AI)). By contrast, rates of nitrate immobilization (I-NO3, 0.46 mg N kg(-1) soil d(-1)) and dissimilatory nitrate reduction to ammonium (DNRA, 0.10 mg N kg(-1) soil d(-1)) did not respond to the changing aridity. These results suggest that predicted increases in aridity will exert different effects on various soil internal N cycling processes, and thus potentially have profotmd impact on structure and function of dryland ecosystems.
KeywordAmmonia oxidation archaea Drylands Mineralization Microbial inunobilization Nitrification Nitrogen cycle
Subject AreaSoil Science
Indexed BySCI
WOS IDWOS:000419417900022
Publication PlaceOXFORD
Funding OrganizationNational Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31670482, 41371213] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences [QYZDB-SSW-SMC049] ; Chinese Academy of Sciences-Pelting University Pioneer Cooperation Team ; Thousand Young Talents ProgramChinese Academy of Sciences
Corresponding Author Emailzhangjinbo@njnu.edu.cn ; yhyang@ibcas.ac.cn
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Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Justus Liebig Univ Giessen, Dept Plant Ecol, Heinrich Buff Ring 26, D-35392 Giessen, Germany
4.Univ Coll Dublin, Sch Biol & Environm Sci, Dublin, Ireland
5.Nanjing Normal Univ, Sch Geog Sci, Nanjing 210047, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Kou, Dan,Peng, Yunfeng,Wang, Guanqin,et al. Diverse responses of belowground internal nitrogen cycling to increasing aridity[J]. SOIL BIOLOGY & BIOCHEMISTRY,2018,116:189-192.
APA Kou, Dan.,Peng, Yunfeng.,Wang, Guanqin.,Ding, Jinzhi.,Chen, Yongliang.,...&Yang, Yuanhe.(2018).Diverse responses of belowground internal nitrogen cycling to increasing aridity.SOIL BIOLOGY & BIOCHEMISTRY,116,189-192.
MLA Kou, Dan,et al."Diverse responses of belowground internal nitrogen cycling to increasing aridity".SOIL BIOLOGY & BIOCHEMISTRY 116(2018):189-192.
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