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The effects of warming and nitrogen addition on ecosystem respiration in a Tibetan alpine meadow: The significance of winter warming

文献类型：期刊论文

作者Zong, Ning1; Geng, Shoubao1,2; Duan, Cheng1,2; Shi, Peili1,2; Chai, Xi1,2; Zhang, Xianzhou1
刊名ECOLOGY AND EVOLUTION
出版日期2018-10-01
卷号8期号:20页码:10113-10125
关键词alpine meadow ecosystem respiration N addition simulated warming Tibetan Plateau
ISSN号2045-7758
DOI10.1002/ece3.4484
通讯作者Zong, Ning(zongning@igsnrr.ac.cn) ; Shi, Peili(shipl@igsnrr.ac.cn)
英文摘要In recent decades, global warming has become an indisputable fact on the Tibetan Plateau. Alpine ecosystems are very sensitive to global warming, and the impact may depend on the degree of atmospheric nitrogen (N) deposition. The previous studies have paid more attention to year-round warming, but the effect of winter warming has been unstudied. In this study, a manipulative experiment was conducted, consisting of warming and N addition. It was carried out since 2010 in an alpine meadow, and three types of warming treatments were set up: no warming (NW), year-round (YW), and winter warming (WW). Warming significantly increased air and soil temperature, but decreased soil moisture. Under no N addition, YW showed significantly decreased ecosystem respiration (Reco) in 2012, and WW decreased Reco in 2014. Under N addition, neither YW nor WW had significant effects on Reco, indicating that N addition compensated the negative effect of warming on Reco. Annually, YW and WW decreased ecosystem carbon (C) emissions, and the extent of the reduction was even larger under WW. Under no N addition, both YW and WW significantly decreased aboveground biomass. Moreover, especially under no N, YW and WW significantly decreased soil inorganic N. WW also had negative effects on soil microbial biomass C. Structure equation modeling showed that soil moisture was the most important factors controlling Reco, and soil inorganic N content and microbial biomass C could explain 46.6% and 16.8% of the variation of Reco. The findings indicate that soil property changes under warming had substantial effects on ecosystem C efflux. The inhibitory effects of winter warming on ecosystem C efflux were mainly attributed to the decline of soil N and microbial biomass. Thus, the effects of winter warming on ecosystem C emissions in this semiarid alpine meadow are not as serious as expected and largely depend on N deposition.
WOS关键词SOIL MICROBIAL BIOMASS ; TEMPERATE OLD FIELD ; FREEZE-THAW CYCLES ; CLIMATE-CHANGE ; CO2 EFFLUX ; TERRESTRIAL ECOSYSTEMS ; BIOGEOCHEMICAL CYCLES ; SPECIES COMPOSITION ; TUNDRA COMMUNITIES ; SEMIARID GRASSLAND
资助项目National Natural Science Foundation of China[41703079] ; National Natural Science Foundation of China[31870406] ; National Natural Science Foundation of China[31470506] ; West Light Foundation of the Chinese Academy of Sciences[2015] ; National Key Research and Development Program[2016YFC0501803]
WOS研究方向Environmental Sciences & Ecology ; Evolutionary Biology
语种英语
WOS记录号WOS:000449529800013
出版者WILEY
资助机构National Natural Science Foundation of China ; West Light Foundation of the Chinese Academy of Sciences ; National Key Research and Development Program
源URL[http://ir.igsnrr.ac.cn/handle/311030/52462]  
专题中国科学院地理科学与资源研究所
通讯作者Zong, Ning; Shi, Peili
作者单位1.Chinese Acad Sci, Lhasa Natl Ecol Res Stn, Key Lab Ecosyst Network Observat & Modelling, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Zong, Ning,Geng, Shoubao,Duan, Cheng,et al. The effects of warming and nitrogen addition on ecosystem respiration in a Tibetan alpine meadow: The significance of winter warming[J]. ECOLOGY AND EVOLUTION,2018,8(20):10113-10125.
APA Zong, Ning,Geng, Shoubao,Duan, Cheng,Shi, Peili,Chai, Xi,&Zhang, Xianzhou.(2018).The effects of warming and nitrogen addition on ecosystem respiration in a Tibetan alpine meadow: The significance of winter warming.ECOLOGY AND EVOLUTION,8(20),10113-10125.
MLA Zong, Ning,et al."The effects of warming and nitrogen addition on ecosystem respiration in a Tibetan alpine meadow: The significance of winter warming".ECOLOGY AND EVOLUTION 8.20(2018):10113-10125.

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来源：地理科学与资源研究所

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