尕海湿地CH4、CO2和N2O通量特征初步研究

doi:10.11686/cyxb2014350

摘要/Abstract

摘要： 2011年7月-2012年7月,采用静态箱-气相色谱法同步研究了尕海4种典型湿地类型的CH₄、CO₂和N₂O通量及其与温度因子的关系,并估算了其全球变暖潜势值(GWP)。结果表明,尕海湿地的CH₄、CO₂和N₂O通量具有明显的空间变化特征,CH₄、CO₂和N₂O通量最小值分别为亚高山草甸(-0.014±0.126) mg/(m²·h),沼泽湿地(137.17±284.51) mg/(m²·h)和高山湿地(-0.008±0.022) mg/(m²·h),而最大值分别为沼泽湿地(0.498±0.682) mg/(m²·h),高山湿地(497.81±473.09) mg/(m²·h)和草本泥炭地(0.094±0.117) mg/(m²·h);同时CH₄、CO₂通量有明显的时间变化特征,通量最大值分别出现在2011年的7-10月和2012年的5-7月,而后降低并维持相对稳定的变化趋势;5 cm地温、气温、地表温度及箱内温度与4种类型湿地CO₂通量呈极显著正相关关系(P<0.01),与高山湿地CH₄通量均存在显著正相关关系(P<0.05),与其他3种湿地类型CH₄通量的相关性均较差,但与4种湿地类型N₂O通量无显著相关性;尕海草本泥炭地、沼泽湿地、高山湿地和亚高山草甸4种类型湿地的温室效应贡献潜力依次为35.311,13.520,34.816和30.236 t CO₂/(hm² ·a), 沼泽湿地能够显著降低温室效应。

Abstract: A study has been undertaken to estimate fluxes of the greenhouse gases carbon dioxide (CO₂), methane (CH₄) and nitrous oxide (N₂O) in wetlands, to understand the effects of temperature factors on these processes and to estimate global warming potential (GWP). Using static chamber techniques, we measured CH₄, CO₂, and N₂O fluxes from four wetland types in Gansu Gahai Wetlands, China, from July 2011 to July 2012. The results showed high variations in CH₄, CO₂ and N₂O fluxes between the four wetlands, with the smallest values in the subalpine meadow (-0.014±0.126 mg/m²·h), marsh wetland (137.17±284.51 mg/m²·h) and mountain wetland (-0.008±0.022 mg/m²·h) respectively. The highest values of CH₄, CO₂ and N₂O fluxes were in marsh wetland (0.498±0.682 mg/m²·h), mountain wetland (497.81±473.09 mg/m²·h) and herbaceous peat (0.094±0.117 mg/m²·h) respectively. CH₄ and CO₂ fluxes varied seasonally. Maximal fluxes occurred between July-October 2011 and May-July 2012, then decreased and remained relatively steady, with some slight fluctuations during the winter and thawing or freezing periods. Further analysis showed that air temperature, soil temperature (at 5 cm), surface temperature and temperature inside the box were highly significantly positively correlated with CO₂ flux from the four wetlands. These variables were significantly positively correlated with CH₄ flux from mountain wetland but not from the other wetland types. They were significantly negatively correlated with N₂O flux from all four wetland types. The GWP estimates were 35.311, 13.520, 34.816 and 30.236 t CO₂/(hm² ·a) from herbaceous peat, marsh wetland, mountain wetland and subalpine meadow respectively. These results show that marsh wetland could significantly decrease the emission of greenhouse gases from the Gahai Wetlands.

马维伟, 王辉, 李广, 赵锦梅, 王跃思. 尕海湿地CH₄、CO₂和N₂O通量特征初步研究[J]. 草业学报, 2015, 24(8): 1-10.

MA Wei-Wei, WANG Hui, LI Guang, ZHAO Jin-Mei, WANG Yue-Si. A preliminary study of carbon dioxide, methane and nitrous oxide fluxes from the Gahai wetland[J]. Acta Prataculturae Sinica, 2015, 24(8): 1-10.

参考文献

[1] Wang M X, Zhang R J, Zheng X H. The source and sink of greenhouse gas. Climatic and Environmental Research, 2000, 5(1): 75-79.
[2] Han Q T, Xu X S, Lu C Q, et al . Net exchanges of CO 2 , CH 4 , and N 2 O between China’s terrestrial ecosystems and the atmosphere and their contributions to global climate warming. Journal of Geophysical Research, 2011, 116: G02011, doi:10. 1029/2010 JG001393.
[3] Aselmann I, Crutzen P J. Global distribution of natural freshwater wetlands and rice paddies, their net primary production, seasonality and possible methane emissions. Journal of Atmospheric Chemistry, 1989, 8: 307-358.
[4] Whiting G J, Chanton J P. Greenhouse carbon balance of wetlands: methane emission versus carbon equestration. Tellus, 2001, B53: 521-528.
[5] Bridgham S D, Megonigal J P, Keller J K. The carbon balance of North American wetlands. Wetlands, 2006, 26: 889-916.
[6] Brix H, Sorrell B K, Lorenzen B. Are phragmites-dominated wetlands a net source or net sink of greenhouse gases. Aquatic Botany, 2001, 69: 313-324.
[7] Bubier J L, Moore T R. An ecological perspective on methane emission from northern wetlands. Trends in Ecology and Evolution, 1994, 9: 460-464.
[8] Bubier J L, Bhatia G, Moore T R, et al . Spatial and temporal variability in growing-season net ecosystem carbon dioxide exchange at a large peatland in Ontario, Canada. Ecosystem, 2003, 6: 353-367.
[9] Alm J, Schulman J, Walden H, et al . Carbon balance of a boreal bog during a year with an exceptionally dry summer. Ecology, 1999, 80: 161-174.
[10] Alm J, Talanov A, Saamio S, et al . Reconstruction the carbon balance for microsites in a boreal oligotrophic pine fen, Finland. Oecologia, 1997, 110: 423-431.
[11] Whiting G J. Exchange in the Hudson-Bay lowlands-community characteristics and multispectral reflectance properties. Journal of Geophysical Research, 1994, 99: 1519-1528.
[12] Wand J L, Zhong Z M, Wang Z H, et al . Soil C/P distribution characteristics of alpine steppe ecosystems in the Qinhai-Tibetan Plateau. Acta Prataculturae Sinica, 2014, 23(2): 9-19.
[13] Zhao P, Dai W A, Du M X, et al . Response of Amorpha fruiticosa planting to soil nutrients in the Tibetan Plateau. Acta Prataculturae Sinica, 2014, 23(3): 175-181.
[14] Wei W B, Li T, Li J Z. Gahai wetland ecosystem conservation and managment. Wetland Science and Management, 2010, 6(3): 32-34.
[15] Juutinen S, Alm J, Martikainen P, et al . Effects of spring flood and water level draw-down on methane dynamics in the littoral zone of boreal lakes. Freshw Biology, 2001, 46: 855-869.
[16] Kaki T, Ojala A, Kankaala P. Diel variation in methane emissions from stands of Phragmites australis (Cav.) Trin. ex Steud. and Typha latifolia L. in a boreal lake. Aquat Bottany, 2001, 71(4): 259-271.
[17] Hirota M Y, Tang Y, Hu Q, et al . Methane emissions from different vegetation zones in a Qinghai-Tibetan Plateau wetland. Soil Biology and Bio-chemistry, 2004, 36: 737-748.
[18] Chen H, Yao S, Wu N, et al . Determinants influencing seasonal variations of methane emissions from alpine wetlands in Zoige Plateau and their implications. Journal of Geophysical Research: Atmospheres, 2008, 113:D12303, doi:10.1029/2006JD008072.
[19] Mosier A R. Impact of agriculture on soil consumption of atmospheric CH 4 and a comparison of CH 4 and N 2 O flux in subarctic, temperate and tropical grasslands. Nutrient Cycling in Agro-ecosystems, 1997, 49(1-3): 71-83.
[20] West A E, Schmidt S K. Acetate stimulates atmospheric CH 4 oxidation by an alpine tundra soil. Soil Biology and Biochemistry, 1999, 31: 1649-1655.
[21] Pei Z Y, Hua Q Y, Zhou C P, et al . Fluxes of CO 2 , CH 4 and N 2 O from alpine grassland in the Tibetan Plateau. Journal of Geographical Sciences, 2003, 13(1): 27-34.
[22] Dong Y, Zhang S, Qi Y. Fluxes of CO 2 , N 2 O and CH 4 from typical temperate grassland in Inner Mongolia and its daily variation. Chinese Science Bulletin, 2000, 45(17): 1590-1594.
[23] Kammann C. Methane flux from differentially managed grassland study plots: the important role of CH 4 oxidation in grassland with a high potential for CH 4 production. Environmental Pollution, 2001, 115: 261-273.
[24] Joabsson A, Chistensen T R. Methane emissions from wetlands and their relationship with vascular plants: an Arctic example. Global Change Biology, 2001, 7: 919-932.
[25] Zhang F W, Liu A H, Li Y N, et al . CO 2 flux in alpine wetland ecosystem on the Qingha-Tibetan Plateau. Acta Ecologica Sinica, 2008, (2): 453-462.
[26] Danevcic T, Mandic-Mulec I, Stres B, et al . Emissions of CO 2 , CH 4 and N 2 O from Southern uropean peatlands. Soil Biology and Biochemistry, 2010, 42: 1437-1446.
[27] Ojanen P, Minkkinen K R, Almb J K, et al . Soil-atmosphere CO 2 , CH 4 and N 2 O fluxes in boreal forestry-drained peatlands. Forest Ecology and Management, 2010, 260: 411-421.
[28] Salm J R, Maddison M, Tammik S, et al . Emissions of CO 2 , CH 4 and N 2 O from undisturbed, drained and mined peatlands in Estonia. Hydrobiologia, 2012, 692: 41-55.
[29] Klemedtsson L, Von-Arnold K, Weslien P, et al . Soil C, N ratio as a scalar parameter to predict nitrous oxide emissions. Global Change Biology, 2005, 11: 1142-1147.
[30] Hayden M J, Ross D S. Denitrification as a nitrogen removal mechanism in a Vermont peatland. Journal of Environment Quality, 2005, 34: 2052-2061.
[31] Li X D, Shen X K, Zhang C P, et al . Factors influencing soil respiration in a pea field in the Loess Plateau. Acta Prataculturae Sinica, 2014, 23(5): 24-30.
[32] Huttunen J T, Nykänen H, Turunen J, et al . Methane emissions from natural peatlands in the northern boreal zone in Finland, Fennosca-ndia. Atmospheric Environment, 2003, 37: 147-151.
[33] Freeman C, Nevison G B, Kang H. Contrasted effects of simulated drought on the production and oxidation of methane in a mid Wales wetland. Soil Biology and Biochemistry, 2002, 34: 61-67.
[34] Liikanen A, Huttunen J T, Karjalainen S M, et al . Temporal and seasonal changes in greenhouse gas emissions from a constructed wetland purifying peat mining runoff waters. Ecological Engineering, 2006, 26: 241-251.
[35] Koh H S, Ochs C A, Yu K. Hydrologic gradient and vegetation controls on CH 4 and CO 2 fluxes in a spring-fed forested wetland. Hydrobiologia, 2009, 630: 271-286.
[36] Hirota M, Senga Y, Seike Y, et al . Fluxes of carbon dioxide, methane and nitrous oxide in two contrastive fringing zones of coastal lagoon, Lake Nakaumi, Japan. Chemosphere, 2007, 68(3): 597-603.
[37] Sun Z G, Liu J S, Yang J S, et al . Nitrification denih-ification and N 2 O emission of typical Calamagrostis angustifolia wetland soils in San jiang Plain. Chinese Journal of Applied Ecology, 2007, 18(1): 185-192.
[38] Dowrick D J, Hughes S, Freeman C, et al . Nitrous oxide emissions from a gully mire in mid Wales, U K, under simulated summer drought. Biogeochemistry, 1999, 44: 151-162.
[39] Sun Z G, Liu J S, Yang J S, et al . N 2 O flux characteristics and emission contributions of Calamagrostis angustifolia wetland during growth and non-growth seasons. Acta Prataculturae Sinica, 2009, 18(6): 242-247.
[40] Wang L L, Sun Z G, Mou X J, et al . A preliminary study on carbon dioxide, methane and nitrous oxide fluxes from intertidal flat wetlands of the Yellow River estuary. Acta Prataculturae Sinica, 2011, 20(3): 51-61.
[41] Yang S H, Chen G X, Lin J H, et al . N 2 O emission from woody plants and its relation to their physiological activities. Chinese Journal of Applied Ecology, 1995, 6(4): 337-340.
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[12] 王建林, 钟志明, 王忠红, 等. 青藏高原高寒草原生态系统土壤碳磷比的分布特征. 草业学报, 2014, 23(2):9-19.
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[25] 张法伟, 刘安花, 李英年, 等. 青藏高原高寒湿地生态系统CO 2 通量. 生态学报, 2008, (2): 453-462.
[31] 李旭东,沈晓坤,张春平, 等. 黄土高原农田土壤呼吸特征及其影响因素. 草业学报, 2014, 23(5): 24-30.
[37] 孙志高,刘景双, 杨继松,等. 三江平原典型小叶章湿地土壤硝化-反硝化作用与氧化亚氮排放. 应用生态学报, 2007, 18(1): 185-192.
[39] 孙志高, 刘景双, 杨继松,等. 生长季与非生长季小叶章湿地N 2 O通量特征及排放贡献.草业学报, 2009, 18(6): 242-247.
[40] 王玲玲, 孙志高, 牟晓杰,等. 黄河口滨岸潮滩湿地 CO 2 、CH 4 和 N 2 O通量特征初步研究.草业学报, 2011, 20(3): 51-61.
[41] 杨思河, 陈冠雄, 林继慧,等. 几种木本植物的N 2 O释放与某些生理活动的关系. 应用生态学报, 1995, 6(4): 337-340.

尕海湿地CH₄、CO₂和N₂O通量特征初步研究

A preliminary study of carbon dioxide, methane and nitrous oxide fluxes from the Gahai wetland

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