[1] Piao S L,Tan K,Nan H J,et al. Impacts of climate and CO2 changes on the vegetation growth and carbon balance of Qinghai-Tibetan grasslands over the past five decades[J]. Global and Planetary Change,2012,98-99:73-80 [2] Li L,Yang S,Wang Z Y,et al. Evidence of warming and wetting climate over the Qinghai-Tibet Plateau[J]. Arctic,Antarctic,and Alpine Research,2010,42:449-457 [3] Thompson L G,Yao T,Davis M E,et al. Tropical climate instability:the last glacial cycle from a Qinghai-Tibetan Ice Core[J]. Science,1997,276:1821-1825 [4] Dentener F,Drevet J,Lamarque J F,et al. Nitrogen and sulfur deposition on regional and global scales:A multimodel evaluation[J]. Global Biogeochemistry Cycles,2006,20:GB4003 [5] Lu C Q,Tian H Q. Half-century nitrogen deposition increase across China:A gridded time-series data set for regional environmental assessments[J]. Atmospheric Environment,2014,97:68-74 [6] Liu Y W,Xu R,Wang Y S,et al. Wet deposition of atmospheric inorganic nitrogen at five remote sites in the Tibetan Plateau[J]. Atmospheric Chemistry and Physics,2015,15:11683-11700 [7] Hou S G,Qin D H,Zhang D Q,et al. A 154a high-resolution ammonium record from the Rongbuk Glacier,north slope of Mt. Qomolangma (Everest),Tibet-Himal region[J]. Atmospheric Environment,2003,37:721-729 [8] Kang S,Mayewski P A,Qin D H,et al. Glaciochemical records from a Mt. Everest ice core:relationship to atmospheric circulation over Asia[J]. Atmospheric Environment,2002,36:3351-3361 [9] Hu Z J,Anderson N J,Yang X D,et al. Catchment-mediated atmospheric nitrogen deposition drives ecological change in two alpine lakes in SE Tibet[J]. Global Change Biology,2014,20:1614-1628 [10] Chen X P,Wang G X,Zhang T,et al. Effects of warming and nitrogen fertilization on GHG flux in the permafrost region of an alpine meadow[J]. Atmospheric Environment,2017,157:111-124 [11] Zhang T,Wang G X,Yang Y,et al. Grassland types and season-dependent response of ecosystem respiration to experimental warming in a permafrost region in the Tibetan Plateau[J]. Agricultural and Forest Meteorology,2017,247:271-279 [12] Janssens I A,Dieleman W,Luyssaert S,et al. Reduction of forest soil respiration in response to nitrogen deposition[J]. Nature Geoscience,2010,3:315-322 [13] Jiang L L,Wang S P,Pang Z,et al. Plant organic N uptake maintains species dominance under long-term warming[J]. Plant Soil,2018:433,243-255 [14] 张晓琳,翟鹏辉,黄建辉. 降水和氮沉降对内蒙古半干旱草地羊草和大针茅叶片碳交换的影响[J]. 草地学报,2019,27(4):977-986 [15] Liu L L,Tara L G. A review of nitrogen enrichment effects on three biogenic GHGs:the CO2 sink may be largely offset by stimulated N2O and CH4 emission[J]. Ecology Letters,2009,12:1103-1117 [16] Wei D,Xu R,Tenzin T,et al. Revisiting the role of CH4 emissions from alpine wetlands on the Tibetan Plateau:evidence from two in situ measurements at 4758 to 4320 m above sea level[J]. Journal of Geophysical Research,2015,120:1741-175 [17] Marion G M,Henry G H R,Freckman D W,et al. Open-top designs for manipulating field temperature in high-latitude ecosystems[J]. Global Change Biology,1997,3(Supplement 1):20-32 [18] Zhang T,Wang G X,Yang Y,et al. Non-growing season soil CO2 flux and its contribution to annual soil CO2 emissions in two typical grasslands in the permafrost region of the Qinghai-Tibet Plateau[J]. European Journal of Soil Biology,2015,7:45-52 [19] Peng F,You Q G,Xu M H,et al. Effects of warming and clipping on ecosystem carbon fluxes across two hydrologically contrasting years in an alpine meadow of the Qinghai-Tibet Plateau[J]. Plos One,2014,9(10):e109319 [20] 白炜,奚晶阳,王根绪. 短期增温与施氮对青藏高原高寒沼泽草甸生态系统CO2排放的影响[J]. 生态学杂志,2019,38(4):927-936 [21] 旦增塔庆,旭日,魏学红,等. 西藏纳木错高寒草原、高寒草甸和沼泽化草甸主要温室气体通量对比研究[J]. 草地学报,2014,22(3):493-501 [22] 董斅晓,薄元超,张晓琳,等. 农牧交错带半干旱草地生态系统土壤呼吸对短期不同放牧强度的响应[J]. 草地学报,2019,27(1):53-62 [23] Piao S L,Luyssaert S,Ciais P,et al. Forest annual carbon cost:A global-scale analysis of autotrophic respiration[J]. Ecology,2010,91:652-661 [24] Haei M,Rousk J,Ilstedt U,et al. Effects of soil frost on growth,composition and respiration of the soil microbial decomposer community[J]. Soil Biology & Biochemistry,2011,43:2069-2077 [25] Scott L G,John E H,Peter M,et al. Effects of Soil Warming and Nitrogen Fertilization on Soil Respiration in a New Zealand Tussock Grassland[J]. Plos One,2014,9(3):e91204 [26] Mo J M,Zhang W,Zhu W X,et al. Nitrogen fertilization reduces soil respiration in a mature tropical forest in southern China[J]. Global Change Biology,2007,14:1-10 [27] Contosta A R,Frey S D,Cooper A B. Seasonal dynamics of soil respiration and N mineralization in chronically warmed and fertilized soils[J]. Ecosphere,2011,2(3):1-21 [28] Chen S,Hao T X,Goulding K,et al. Impact of 13-years of nitrogen addition on nitrous oxide and methane fluxes and ecosystem respiration in a temperate grassland[J]. Environmental Pollution,2019,252:675-681 [29] Oechel W C,Vourlitis G L,Hastings S J,et al. Acclimation of ecosystem CO2 exchange in the Alaskan Arctic in response to decadal climate warming[J]. Nature,406:978-981 [30] Zhou L Y,Zhou X H,Zhang B C,et al. Different responses of soil respiration and its components to nitrogen fertilization among biomes:a meta-analysis[J]. Global Change Biology,2014,20:2332-2343 |