DOI: 10.1016/j.scitotenv.2019.135818
论文题名: Effects of increased precipitation combined with nitrogen addition and increased temperature on methane fluxes in alpine meadows of the Tibetan Plateau
作者: Wu H. ; Wang X. ; Ganjurjav H. ; Hu G. ; Qin X. ; Gao Q.
刊名: Science of the Total Environment
ISSN: 489697
出版年: 2020
卷: 705 语种: 英语
英文关键词: CH4 uptake
; Climate warming
; Interaction effects
; Nitrogen addition
; Precipitation addition
Scopus关键词: Atmospheric chemistry
; Ecosystems
; Methane
; Nitrogen
; Soil moisture
; Anthropogenic activity
; CH4 uptake
; Climate warming
; Increased temperature
; Interaction effect
; Methyl-coenzyme M reductase
; Nitrogen additions
; Precipitation controls
; Climate change
; ammonia
; ammonium nitrogen
; bacterial protein
; methane
; methane monooxygenase alpha subunit
; methyl coenzyme M reductase alpha subunit
; molecular marker
; nitrate nitrogen
; nitrogen
; nitrogen derivative
; organic carbon
; rain
; unclassified drug
; climate change
; concentration (composition)
; future prospect
; global warming
; methane
; precipitation (chemistry)
; research
; air pollution
; air temperature
; alpine meadow
; Article
; atmospheric diffusion
; atmospheric nitrogen addition
; bacterial count
; bacterial gene
; bacterium identification
; biogeochemical cycle
; carbon footprint
; carbon sink
; climate warming
; controlled study
; denitrifying bacterium
; ecosystem restoration
; environment
; environmental impact
; gas chromatography
; gene amplification
; gene dosage
; gene identification
; geographic distribution
; greenhouse effect
; land biome
; mcrA gene
; methane flux
; methane sink
; methanogen
; methanotroph
; microbiome
; nonhuman
; particulate matter
; plateau
; pmoA gene
; population abundance
; priority journal
; quantitative analysis
; real time polymerase chain reaction
; seasonal variation
; sediment
; soil analysis
; soil moisture
; soil property
; soil temperature
; soil water content
; Tibet
; trend study
; China
; Qinghai-Xizang Plateau
英文摘要: Climate change and anthropogenic activities have resulted in increased atmospheric methane (CH4) concentration. Increased nitrogen deposition and precipitation accompanies climate warming and can change soil carbon and nitrogen dynamics and microbial processes and alter CH4 fluxes. To quantify the sink of the vast alpine meadows of the Tibetan Plateau and to examine how precipitation addition (P), warming (W), and nitrogen addition (N) affect CH4 fluxes in alpine meadows, we conducted continuous 3-growing season experiments in an alpine meadow using the static chamber and gas chromatograph method. Soil CH4 samples were collected during the early, peak, and late stages of the growing season from 2015 to 2017. Our results suggested that neither P, W, nor N had an interaction effect on soil CH4 uptake. P significantly increased and decreased the copies number of particulate methane monooxygenase alpha subunit (pmoA) and methyl-coenzyme M reductase alpha subunit (mcrA), respectively. However, P significantly decreased CH4 uptake, particularly under the combined treatment of P and N. Compared with the control, CH4 uptake decreased under P, N, PW, and PN by 50.64%, 6.24%, 39.37%, and 75.06%, respectively, whereas under W and WN CH4 uptake increased by 16.19% and 7.56%, respectively. Soil CH4 uptake was positively correlated with soil temperature and pmoA and negatively correlated with soil moisture and NH4 +-N content. CH4 uptake was significantly affected by the sampling period. CH4 uptake was significantly lower rates during peak growing season compared with those during the early and late stages of the growing season. Our results suggest that, (1) CH4 fluxes of alpine grassland ecosystems are more sensitive to P than W or N, and (2) precipitation controls CH4 flux response to increasing nitrogen deposition in alpine meadows on the Tibetan Plateau. Therefore, future research should focus on the response and feedback of CH4 uptake to changes in precipitation. © 2019 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159206
Appears in Collections: 气候变化与战略
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作者单位: Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
Recommended Citation:
Wu H.,Wang X.,Ganjurjav H.,et al. Effects of increased precipitation combined with nitrogen addition and increased temperature on methane fluxes in alpine meadows of the Tibetan Plateau[J]. Science of the Total Environment,2020-01-01,705