黄河中游芦苇群落土壤CO_2排放及其影响因素
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摘要
对黄河中游滨河湿地芦苇群落土壤CO_2排放速率数据进行采集,按相对水位、气温及群落状况进行筛选,旨在评价研究区CO_2排放水平,分析气候变化对其造成的影响。各条件下,低矮芦苇群落土壤CO_2排放速率平均为353.30 mmol·m~(-2)·h~(-1),成熟群落的为17.62 mmol·m~(-2)·h~(-1);随水位上升,CO_2排放速率逐渐下降,但成熟群落的在相对水位为-10~10 cm时有上升波动,低矮芦苇群落土壤的CO_2排放速率下降幅度大于成熟群落的;随气温上升,各类型湿地CO_2排放速率有下降趋势,其变化幅度排序为低矮干>低矮湿>成熟群落;低矮芦苇群落CO_2排放速率受水位、气温的影响都远大于成熟群落的。
Through collecting CO_2 emission rate data in riverside reed wetland in the middle reaches of the Yellow River,and screening the data according to the conditions of water level,temperature and the community,this study evaluated CO_2 emission levels in the study area,and also analyzed the impacts of climate change. Under different conditions,the emission rate is 353.30 mmol·m~(-2)·h~(-1) for low reed communities averagely,and 17.62 mmol·m~(-2)·h~(-1) for mature communities; With the water levels rising,CO_2 emission decreases gradually,but appears a fluctuation for mature communities in near-10-10 cm water level,the change range of CO_2 emission rate suggests low > mature community. Along with the temperature rising,CO_2 emissions of various type sites have a falling trend,the change range shows low-dry>lowwet>mature community; CO_2 emissions rates well as influences of water level and temperature of low community is obviously greater than those of mature community.
Through collecting CO_2 emission rate data in riverside reed wetland in the middle reaches of the Yellow River,and screening the data according to the conditions of water level,temperature and the community,this study evaluated CO_2 emission levels in the study area,and also analyzed the impacts of climate change. Under different conditions,the emission rate is 353.30 mmol·m~(-2)·h~(-1) for low reed communities averagely,and 17.62 mmol·m~(-2)·h~(-1) for mature communities; With the water levels rising,CO_2 emission decreases gradually,but appears a fluctuation for mature communities in near-10-10 cm water level,the change range of CO_2 emission rate suggests low > mature community. Along with the temperature rising,CO_2 emissions of various type sites have a falling trend,the change range shows low-dry>lowwet>mature community; CO_2 emissions rates well as influences of water level and temperature of low community is obviously greater than those of mature community.
引文
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[21]董成仁,郗敏,李悦,等.湿地生态系统CO2源/汇研究综述[J].地理与地理信息科学,2015,31(2):109-114.
[22]汪青,刘敏,侯立军,等.崇明东滩湿地CO2、CH4和N2O排放的时空差异[J].地理研究,2010,29(5):935-946.
[23]AURELA M,LAURILA T,TUOVINEN J P.The Timing of Snow Melt Controls the Annual CO2Balance in a Subarctic Fen[J].Geophysical Research Letters,2004,31:16119.
[24]CORRADI C,KOLLE O,WALTER K,et al.Carbon Dioxide and Methane Exchange of a North-East Siberian Tussock Tundra[J].Global Change Biology,2005,11(11):1910-1925.
[2]IPCC.Climate change 2001:The science basis[M].Cambridge:Cambridge University Press,2001:152-166
[3]韩帅,黄玲玲,王昭艳,等.长江安庆段河流湿地生态系统呼吸及其影响因子[J].生态学报,2009,29(7):3621-3628.
[4]胡启武,幸瑞新,朱丽丽,等.鄱阳湖苔草湿地非淹水期CO2排放特征[J].应用生态学报,2011,22(6):1431-1436.
[5]张艺,王春梅,许可,等.若尔盖湿地土壤温室气体排放对模拟氮沉降增加的初期响应[J].北京林业大学学报,2016,38(8):54-63.
[6]宋长春,杨文燕,徐小锋,等.沼泽湿地生态系统土壤CO2和CH4排放动态及影响因素[J].环境科学,2004,25(4):1-6.
[7]胡泓,王东启,李杨杰,等.崇明东滩芦苇湿地温室气体排放通量及其影响因素[J].环境科学研究,2014,27(1):43-50.
[8]汪旭明,任洪昌,仝川.盐度对河口潮汐湿地温室气体产生和排放的影响研究进展[J].湿地科学,2014,12(6):814-820.
[9]牟晓杰,刘兴土,仝川,等.闽江河口短叶茳芏湿地CH4和N2O排放对氮输入的短期响应[J].环境科学,2012,33(7):2482-2489.
[10]胡敏杰,邹芳芳,任鹏,等.河口潮滩湿地CH4、CO2排放通量对氮硫负荷增强的响应[J].环境科学学报,2016,36(4):1359-1368.
[11]曾昭文,刘赢男,倪红伟.土地利用变化对湿地生态系统温室气体排放的影响[J].国土与自然资源研究,2009(3):42-43.
[12]王洋,刘景双,窦晶鑫,等.温度升高对湿地系统温室气体排放的影响[J].安全与环境学报,2010,10(5):122-126.
[13]万忠梅.水位对小叶章湿地CO2、CH4排放及土壤微生物活性的影响[J].生态环境学报,2013,22(3):465-468.
[14]陈冬冬,戴永久.近五十年我国西北地区降水强度变化特征[J].大气科学,2009,33(5):923-935.
[15]张文,寿绍文,杨金虎,等.近45a来中国西北汛期降水极值的变化分析[J].干旱区资源与环境,2007,21(12):126-132.
[16]HAN G,XING Q,YU J,et al.Agricultural Reclamation Effects on Ecosystem CO2Exchange of a Coastal Wetland in the Yellow River Delta[J].Agriculture,Ecosystems&Environment,2014,196:187-198.
[17]SCHNEIDER J,KUTZBACHL,WILMKING M.Carbon Dioxide Exchange Fluxes of a Boreal Peatland over a Complete Growing Season,Komi Republic,NW Russia[J].Biogeochemistry,2012,111(1-3):485-513.
[18]VAN DER NAT F J,MIDDELBURG J J.Seasonal Variation in Methane Oxidation by the Rhizosphere of Phragmites Australis and Scirpus Lacustris[J].Biogeochemistry,1998,43:79-104.
[19]BURKETT V,KUSLER J.Climate Change:Potential Impacts and Interactions in Wetlands of the United States[J].Jawra Journal of the American Water Resources Association,2000,36(2):313-320.
[20]SILVOLA J,ALM J,AHLHOLM U,et al.Martikainen PJ CO2Fluxes from Peat in Boreatin Mires Under Varying Temperature and Moisture Conditions[J].The Journal of Ecology,1996,84(2):219-228.
[21]董成仁,郗敏,李悦,等.湿地生态系统CO2源/汇研究综述[J].地理与地理信息科学,2015,31(2):109-114.
[22]汪青,刘敏,侯立军,等.崇明东滩湿地CO2、CH4和N2O排放的时空差异[J].地理研究,2010,29(5):935-946.
[23]AURELA M,LAURILA T,TUOVINEN J P.The Timing of Snow Melt Controls the Annual CO2Balance in a Subarctic Fen[J].Geophysical Research Letters,2004,31:16119.
[24]CORRADI C,KOLLE O,WALTER K,et al.Carbon Dioxide and Methane Exchange of a North-East Siberian Tussock Tundra[J].Global Change Biology,2005,11(11):1910-1925.