Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1038/ncomms5799 |
Aridity threshold in controlling ecosystem nitrogen cycling in arid and semi-arid grasslands | |
Wang, Chao1,2; Wang, Xiaobo1,2,3; Liu, Dongwei1,2; Wu, Honghui1; Lu, Xiaotao1; Fang, Yunting1; Cheng, Weixin1,4; Luo, Wentao1,2; Jiang, Ping1; Shi, Jason3; Yin, Huaqun3; Zhou, Jizhong3,5,6; Han, Xingguo1; Bai, Edith1 | |
通讯作者 | Han, Xingguo |
来源期刊 | NATURE COMMUNICATIONS |
ISSN | 2041-1723 |
出版年 | 2014 |
卷号 | 5 |
英文摘要 | Higher aridity and more extreme rainfall events in drylands are predicted due to climate change. Yet, it is unclear how changing precipitation regimes may affect nitrogen (N) cycling, especially in areas with extremely high aridity. Here we investigate soil N isotopic values (delta N-15) along a 3,200 km aridity gradient and reveal a hump-shaped relationship between soil delta N-15 and aridity index (AI) with a threshold at AI = 0.32. Variations of foliar delta N-15, the abundance of nitrification and denitrification genes, and metabolic quotient along the gradient provide further evidence for the existence of this threshold. Data support the hypothesis that the increase of gaseous N loss is higher than the increase of net plant N accumulation with increasing AI below AI = 0.32, while the opposite is favoured above this threshold. Our results highlight the importance of N-cycling microbes in extremely dry areas and suggest different controlling factors of N-cycling on either side of the threshold. |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000342928700003 |
WOS关键词 | SOIL MICROBIAL BIOMASS ; PRECIPITATION GRADIENT ; ENVIRONMENTAL CONTROLS ; EXTRACTION METHOD ; GLOBAL PATTERNS ; PLANT NITROGEN ; WATER ; DELTA-N-15 ; GEOCHIP ; PULSES |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
来源机构 | 清华大学 ; University of California, Berkeley |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/183964 |
作者单位 | 1.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110164, Peoples R China; 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; 3.Univ Oklahoma, Inst Environm Genom, Dept Microbiol & Plant Biol, Norman, OK 73019 USA; 4.Univ Calif Santa Cruz, Dept Environm Studies, Santa Cruz, CA 95064 USA; 5.Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA; 6.Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Chao,Wang, Xiaobo,Liu, Dongwei,et al. Aridity threshold in controlling ecosystem nitrogen cycling in arid and semi-arid grasslands[J]. 清华大学, University of California, Berkeley,2014,5. |
APA | Wang, Chao.,Wang, Xiaobo.,Liu, Dongwei.,Wu, Honghui.,Lu, Xiaotao.,...&Bai, Edith.(2014).Aridity threshold in controlling ecosystem nitrogen cycling in arid and semi-arid grasslands.NATURE COMMUNICATIONS,5. |
MLA | Wang, Chao,et al."Aridity threshold in controlling ecosystem nitrogen cycling in arid and semi-arid grasslands".NATURE COMMUNICATIONS 5(2014). |
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