多梯度增温对青藏高原高寒草甸温室气体通量的影响
Response of Greenhouse Gases Flux to Multi-level Warming in an Alpine Meadow of Tibetan Plateau
查看参考文献55篇
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文摘
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高寒草甸是青藏高原重要的草地类型之一。目前增温对高寒草甸温室气体通量影响的研究较少,尤其在不同尺度的增温条件下,温室气体通量的响应尚不明确。因此,设置多梯度增温实验,模拟未来不同幅度增幅情况,对预测高寒草甸温室气体通量的变化具有重要意义。为深入地认识气候变暖对高寒草甸温室气体通量的影响,假设高寒草甸温室气体通量的周转速率在增温条件下随增温梯度而加快。在青藏高原纳木错地区高寒草甸,采用开顶箱法(Open-top chambers,OTCs)设置对照(T0,不增温)以及4个不同程度的增温处理(T1、T2、T3、T4,分别增温1、2、3、4 ℃),结合静态箱-气相色谱法对增温处理后的CO_2、CH_4和N2O通量进行同步观测。对3个生长季(2013—2015年)进行连续观测发现:(1)地下5 cm土壤3年的平均温度相对于对照处理分别增加1.73 ℃(T1)、1.83 ℃(T2)、3.03 ℃(T3)和3.53 ℃(T4);(2)高寒草甸生长季平均呼吸(CO_2)为(42.6±9.11) mg·m~(-2)·h~(-1),同时具有较强的CH_4吸收能力,达到(-47.96±8.76) μg·m~(-2)·h~(-1),其N2O通量维持在较低水平,为(0.3±0.46) μg·m~(-2)·h~(-1);(3)在高寒草甸生长季,温室气体通量与温度以及水分均具有显著的相关关系,但增温未能显著改变生长季温室气体平均通量。以上结果表明,增温所引起的其他环境因素的改变(如伴随不同梯度增温下土壤水分变化的不确定性),导致高寒草甸在短期内进行内部调节,并维持温室气体通量稳定。 |
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其他语种文摘
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The alpine meadow, a main type of grassland on Tibetan Plateau, playing a key role in regulating greenhouse gases(GHGs) flux. To date, it remains unclear how GHGs flux of the alpine meadow responses to warming, especially to multi-level warming. Simulated multi-level warming experiment, therefore, improves the prediction of GHGs flux dynamics. For further understanding the effects of climate warming on GHGs flux in the alpine meadow, we hypothesized that the major GHGs flux, including ecosystem soil CO_2 respiration, CH_4 consumption and N_2O emissions all might be enhanced under warming, we then conducted a simulated gradient warming experiment (T0, no warming; T1~T4 represent the temperature increased by 1, 2, 3 and 4 ℃, respectively) and GHGs flux measurements in an alpine meadow in Namtso of Tibetan Plateau, using open-top chambers(OTCs) and static chamber method, respectively, for the following there growing seasons from year 2013 to 2015. The observations showed that: (1) When compared to the control plots, the three year averaged below ground 5 cm soil temperature increased 1.73 ℃(T1), 1.83 ℃ (T2), 3.03 ℃ (T3) and 3.53 ℃ (T4), respectively for the four warming treatments; (2) The averaged flux of CO_2, CH_4 and N_2O for growing season in alpine meadow were (42.6±9.11) mg·m~(-2)·h~(-1), (-7.96±8.76) μg·m~(-2)·h~(-1) and (0.3±0.46) μg·m~(-2)·h~(-1), respectively; And (3) the GHGs flux were regulated by both soil temperature and moisture, leading to a non-significant response to warming because of the relative variability in soil moisture. Our results suggested that alpine meadow can keep its GHGs flux stable to warming in short term by internal modification (e.g. uncertainty in soil moisture variability accompanied with various warming conditions). |
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来源
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生态环境学报
,2017,26(3):445-452 【核心库】
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DOI
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10.16258/j.cnki.1674-5906.2017.03.012
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关键词
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增温
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高寒草甸
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呼吸
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甲烷
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氧化亚氮
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地址
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1.
中国科学院青藏高原研究所, 中国科学院高寒生态学与生物多样性重点实验室, 北京, 100101
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中国科学院水利部成都山地灾害与环境研究所, 中国科学院山地表生过程与生态调控重点实验室, 四川, 成都, 610041
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1674-5906 |
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学科
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环境科学基础理论 |
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基金
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中国科学院科技先导专项
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国家自然科学基金项目
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文献收藏号
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CSCD:5996890
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参考文献 共
55
共3页
|
|
1.
Abdalla M. Nitrous oxide fluxes and denitrification sensitivity to temperature in Irish pasture soils.
Soil Use and Management,2009,25(4):376-388
|
被引
3
次
|
|
|
|
|
2.
Billings S A. Sensitivity of soil methane fluxes to reduced precipitation in boreal forest soils.
Soil Biology & Biochemistry,2000,32(10):1431-1441
|
被引
8
次
|
|
|
|
|
3.
Blagodatskaya E. Oxygen and substrate availability interactively control the temperature sensitivity of CO_2 and N_2O emission from soil.
Biology and Fertility of Soils,2014,50(5):775-783
|
被引
4
次
|
|
|
|
|
4.
Bowden R D. Carbon dioxide and methane fluxes by a forest soil under laboratory-controlled moisture and temperature conditions.
Soil Biology & Biochemistry,1998,30(12):1591-1597
|
被引
48
次
|
|
|
|
|
5.
Chen J. Differential responses of ecosystem respiration components to experimental warming in a meadow grassland on the Tibetan Plateau.
Agricultural and Forest Meteorology,2016,220:21-29
|
被引
35
次
|
|
|
|
|
6.
Chen W W. Annual methane uptake by typical semiarid steppe in Inner Mongolia.
Journal of Geophysical Research Atmospheres,2010,115(D15):4447-4458
|
被引
1
次
|
|
|
|
|
7.
Chen Z. Covariation between gross primary production and ecosystem respiration across space and the underlying mechanisms: A global synthesis.
Agricultural and Forest Meteorology,2015,203:180-190
|
被引
9
次
|
|
|
|
|
8.
Cheng Y. Effects of soil moisture on gross N transformations and N_2O emission in acid subtropical forest soils.
Biology and Fertility of Soils,2014,50(7):1099-1108
|
被引
13
次
|
|
|
|
|
9.
Cheng Y. Effects of temperature change and tree species composition on N_2O and NO emissions in acidic forest soils of subtropical China.
Journal of Environmental Sciences-China,2014,26(3):617-625
|
被引
4
次
|
|
|
|
|
10.
Curry C L. Modeling the soil consumption of atmospheric methane at the global scale.
Global Biogeochemical Cycles,2007,21(4):5671-5674
|
被引
13
次
|
|
|
|
|
11.
Dijkstra F A. Effects of elevated carbon dioxide and increased temperature on methane and nitrous oxide fluxes: evidence from field experiments.
Frontiers in Ecology and the Environment,2012,10(10):520-527
|
被引
17
次
|
|
|
|
|
12.
Dutaur L. A global inventory of the soil CH_4 sink.
Global Biogeochemical Cycles,2007
|
被引
16
次
|
|
|
|
|
13.
Fu G. Response of Ecosystem Respiration to Experimental Warming and Clipping at Daily Time Scale in an Alpine Meadow of Tibet.
Journal of Mountain Science,2013,10(3):455-463
|
被引
15
次
|
|
|
|
|
14.
Godde M. Influence of soil properties on the turnover of nitric oxide and nitrous oxide by nitrification and denitrification at constant temperature and moisture.
Biology and Fertility of Soils,2000,32(2):120-128
|
被引
14
次
|
|
|
|
|
15.
He B. A quantitative assessment of the relationship between precipitation deficits and air temperature variations.
Journal of Geophysical Research-Atmospheres,2015,120(12):5951-5961
|
被引
5
次
|
|
|
|
|
16.
Hu Q W. Growing Season Ecosystem Respirations and Associated Component Fluxes in Two Alpine Meadows on the Tibetan Plateau.
Journal of Integrative Plant Biology,2008,50(3):271-279
|
被引
11
次
|
|
|
|
|
17.
Hu Y G. Effects of warming and grazing on N_2O fluxes in an alpine meadow ecosystem on the Tibetan plateau.
Soil Biology & Biochemistry,2010,42(6):944-952
|
被引
19
次
|
|
|
|
|
18.
Inclan R. N_2O and CH_4 fluxes in undisturbed and burned holm oak, scots pine and pyrenean oak forests in central Spain.
Biogeochemistry,2012,107(1/3):19-41
|
被引
8
次
|
|
|
|
|
19.
IPCC.
Climate change: the physical science basis,2007:996
|
被引
4
次
|
|
|
|
|
20.
Jiang C M. Short-term effect of increasing nitrogen deposition on CO_2, CH_4 and N_2O fluxes in an alpine meadow on the Qinghai-Tibetan Plateau, China.
Atmospheric Environment,2010,44(24):2920-2926
|
被引
20
次
|
|
|
|
|
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