Coupling Relationships Between Alpine Wetland Ecosystem CO2 and Vapor Fluxes around the Qinghai Lake

Cao Shengkui; Cao Guangchao; Chen Kelong; Feng Qi; Li Zhongqing; Zhang Jing; Han Gaungzhao; Lin Yangyang

doi:10.7522/j.issn.1000-694X.2016.00029

Journal of Desert Research >

2016 , Vol. 36 >Issue 5: 1286 - 1295

DOI: https://doi.org/10.7522/j.issn.1000-694X.2016.00029

Coupling Relationships Between Alpine Wetland Ecosystem CO₂ and Vapor Fluxes around the Qinghai Lake

Cao Shengkui ,
Cao Guangchao ,
Chen Kelong ,
Feng Qi ,
Li Zhongqing ,
Zhang Jing ,
Han Gaungzhao ,
Lin Yangyang

Expand

1. College of Life and Geographical Science/Qinghai Province Key Laboratory of Physical Geography and Environmental Process, Qinghai Normal University, Xining 810008, China;
2. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

Received date: 2015-12-23

Revised date: 2016-03-07

Online published: 2016-09-20

Fold

Abstract

This paper studied the coupling relationships between alpine wetland ecosystem CO₂ fluxes and vapor fluxes on the different time scales with the eddy covariance techniques in Qinghai Lake. Results showed that alpine wetland ecosystem half-hour CO₂ fluxes and vapor fluxes in Qinghai Lake existed in extreme significant negative relationships (P<0.0001), as well as extreme significant and positive linear relationships between half-hour gross ecosystem productivities (GEPs) and vapor fluxes, which the ratio of vapor fluxes participating in ecosystem net CO₂ exchanges (NEE) and ecosystem total carbon absorption in the cloudy days was highest. The alpine wetland ecosystem monthly average half-hour NEEs and vapor fluxes showed an extreme significant negative relationship (R²=0.71,P<0.0001). From vegetation green up stage, growing stage to wilt stage, monthly average half-hour GEPs and vapor fluxes not only showed extreme significant positive linear relationship(P<0.0001), but also a quadratic polynomial one(P<0.0001) at growing stage and withering stage. On the daily scale, the alpine wetland ecosystem daily total NEE and evapotranspiration in Qinghai Lake existed in an extreme significant negative a quadratic polynomial nonlinear relationship (R²=0.58,P<0.0001). The alpine wetland ecosystem daily total GEP and evapotranspiration showed an extreme significant positive exponential correlation (R²=0.42,P<0.0001). On the monthly scale, the alpine wetland ecosystem monthly total NEE and evapotranspiration in Qinghai Lake showed an extreme significant negative linear relationship (R²=0.60,P<0.0001), as well as a quadratic polynomial nonlinear negative relationship (R²=0.63,P<0.0001). The alpine wetland ecosystem monthly total GEPs and evapotranspiration showed an extreme significant positive linear correlation (R²=0.51,P<0.0001) as well as a positive exponential relationship (R²=0.64,P<0.0001).

Key words： ecosystem net CO₂ exchange; gross ecosystem productivity(GEP); vapor flux; coupling relationships; alpine wetland; Qinghai Lake

Cite this article

Cao Shengkui , Cao Guangchao , Chen Kelong , Feng Qi , Li Zhongqing , Zhang Jing , Han Gaungzhao , Lin Yangyang . Coupling Relationships Between Alpine Wetland Ecosystem CO₂ and Vapor Fluxes around the Qinghai Lake[J]. Journal of Desert Research, 2016 , 36(5) : 1286 -1295 . DOI: 10.7522/j.issn.1000-694X.2016.00029

References

[1] 于贵瑞,王秋凤,于振良.陆地生态系统水-碳耦合循环与过程管理研究[J].地球科学进展,2004,19(5):831-838.
[2] 赵风华,于贵瑞.陆地生态系统碳-水耦合机制初探[J].地理科学进展,2008,27(1):32-38.
[3] Xiao J,Sun G,Chen J,et al.Carbon fluxes,evapotranspiration,and water use efficiency of terrestrial ecosystems in China[J].Agricultural and Forest Meteorology,2013,182:76-90.
[4] 宋春林,孙向阳,王根绪.森林生态系统碳水关系及其影响因子研究进展[J].应用生态学报,2015,26(9):2891-2902.
[5] 王玉辉,井长青,白洁,等.亚洲中部干旱区3个典型生态系统生长季水碳通量特征[J].植物生态学报,2014,38(8):795-808.
[6] 刘冉,李彦,王勤学,等.盐生荒漠生态系统二氧化碳通量的年内、年际变异特征[J].中国沙漠,2011,31(1):108-114.
[7] 周琪,李平衡,王权,等.西北干旱区荒漠生态系统通量贡献区模型研究[J].中国沙漠,2014,34(1):98-107.
[8] 张法伟,刘安花,李英年,等.青藏高原高寒湿地生态系统CO₂通量[J].生态学报,2008,28(2):453-462.
[9] Hao Y B,Cui X Y,Wang Y F,et al.Predominance of precipitation and temperature controls on ecosystem CO₂ exchange in Zoige alpine wetlands of southwest China[J].Wetlands,2011,31:413-422.
[10] Kayranli B,Scholz M,Mustafa A,et al.Carbon storage and fluxes within freshwater wetlands:A critical review[J].Wetlands,2010,30:111-124.
[11] Meyers T P.A comparison of summer time water and CO₂ fluxes over rangeland for well-watered and drought conditions[J].Agricultural and Forest Meteorology,2001,106:205-214.
[12] 曹生奎,曹广超,陈克龙,等.青海湖高寒湿地土壤有机碳含量变化特征分析[J].土壤,2013,45(3):392-398.
[13] 马瑞俊,蒋志刚.青海湖流域环境退化对野生陆生脊椎动物的影响[J].生态学报,2006,26(9):3066-3073.
[14] Webb E K,Pearman G I,Leuning R.Correction of flux measurements for density effects due to heat and water-vapor transfer[J].Quarterly Journal of the Royal Meteorological Society,1980,106:85-100.
[15] Baldocchi D,Hicks B B,Meyers T P.Measuring biosphere-atmosphere exchanges of biologically related gases with micrometeorological methods[J].Ecology,1988,69:1331-1340.
[16] Moncrieff J B,Massheder J M,de Bruin H,et al.A system to measure surface fluxes of momentum,sensible heat,water vapour and carbon dioxide[J].Journal of Hydrology,1997,188(1/4):589-611.
[17] Moncrieff J B,Clement R,Finnigan J,et al.Averaging,Detrending and Filtering of Eddy Covariance Time Series,in Handbook of Micrometeorology:A Guide for Surface Flux Measurements[M].Dordrecht,Netherlands Kluwer Academic,2004:7-31.
[18] Morgenstern K,Black T A,Humphreys E R,et al.Sensitivity and uncertainty of the carbon balance of a Pacific Northwest Douglas-fir forest dung an El Niño/La Niña cycle[J].Agricultural and Forest Meteorology,2004,123:201-219.
[19] Massman W J.Concerning the Measurement of Atmospheric Trace Gas Fluxes with Open-and Closed-path Eddy Covariance System:The WPL Terms and Spectral Attenuation,in Handbook of Micrometeorology:A Guide for Surface Flux Measurements[M].Dordrecht,Netherlands:Kluwer Academic,2004:133-160.
[20] Kljun N,Calanca P,Rotach M W,et al.A simple parameterization for flux footprint predictions[J].Boundary-Layer Meteorology,2004,112:503-523.
[21] 吴家兵,关德新,孙晓敏,等.长白山阔叶红松林CO₂交换的涡度通量修订[J].中国科学:D辑(地球科学),2004,34(增刊Ⅱ):95-102.
[22] Burba G,Schmidt A,Scott R L,et al.Calculating CO₂ and H₂O eddy covariance fluxes from an enclosed gas analyzer using an instantaneous mixing ratio[J].Global Change Biology,2012,18:385-399.
[23] Nakai T,Shimoyama K.Ultrasonic anemometer angle of attack errors under turbulent conditions[J].Agricultural and Forest Meteorology,2012,18:162-163.
[24] Burba G G,McDermitt D K,Grelle A,et al.Addressing the influence of instrument surface heat exchange on the measurements of CO₂ flux from open-path gas analyzers[J].Global Change Biology,2008,14(8):1854-1876.
[25] 吉喜斌,赵文智,康尔泗,等.仪器表面加热效应对临泽站开路涡动相关系统CO₂通量的影响[J].高原气象,2013,32(1):65-77.
[26] Kato T,Hirota M,Tang Y H,et al.Strong temperature dependence and no moss photosynthesis in winter CO₂ flux for a Kobresia meadow on the Qinghai-Tibetan plateau[J].Soil Biology & Biochemistry,2005,37:1966-1969.
[27] Wang S Y,Zhang Y,Lü S H,et al.Biophysical regulation of carbon fluxes over an alpine meadow ecosystem in the eastern Tibetan Plateau[J].International Journal of Biometeorology,2015,60(6):1-12.
[28] Lloyd J,Taylor J A.On the temperature dependence of soil respiration[J].Functional Ecology,1994,8:315-323.
[29] Xu L,Baldocchi D D.Seasonal variation in carbon dioxide exchange over a Mediterranean annual grassland in California[J].Agricultural and Forest Meteorology,2004,123:79-96.
[30] Michaelis L,Menten M L.Die kinetic der invertinwirkung[J].Biochemische Zeitschrift,1913,49:333-369.
[31] Falge E,Baldocchi D,Olson R,et al.Gap filling strategies for defensible annual sums of net ecosystem exchange[J].Agricultural and Forest Meteorology,2001,107:43-69.
[32] 李春,何洪林,刘敏,等.ChinaFLUX CO₂通量数据处理系统与应用[J].地球信息科学,2008,10(5):557-565.
[33] Barr A G,Morgenstern K,Black T A,et al.Surface energy balance closure by the eddy-covariance method above three boreal forest stands and implications for the measurement of the CO₂ flux[J].Agricultural and Forest Meteorology,2006,140:322-337.
[34] Amiro B D,Barr A G,Black T A,et al.Carbon,energy and water fluxes at mature and disturbed forest sites,Saskatchewan,Canada[J].Agricultural and Forest Meteorology,2006,136:237-251.
[35] Eichelmann E,Wagner-Riddle C,Warland J,et al.Evapotranspiration,water use efficiency,and energy partitioning of a mature switchgrass stand[J].Agricultural and Forest Meteorology,2016,217:108-119.
[36] Dixon R K,Brown S,Houghton R A,et al.Carbon pools and flux of global forest ecosystems[J].Science,1994,263:185-190.
[37] Law B E,Falge E,Gu L,et al.Environmental controls over carbon dioxide and water vapor exchange of terrestrial vegetation[J].Agricultural and Forest Meteorology,2002,113:97-120.
[38] Yu G R,Zhang L M,Sun X M,et al.Environmental controls over carbon exchange of three forest ecosystems in eastern China[J].Global Change Biology,2008,14(11):2555-2571.

Options

Outlines

模态框（Modal）标题

Abstract

Cite this article

References