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青藏高原高寒湿地温室气体释放对水位变化的响应
Responses of greenhouse gas emissions to water table fluctuations in an alpine wetland on the Qinghai-Tibetan Plateau

查看参考文献26篇

文摘 为了探究水位变化对青藏高原高寒湿地温室气体释放的影响,以高原东部若尔盖典型高寒湿地为研究对象,采用"中型实验生态系"的技术手段,研究了两种不同水位情形[稳定水位(SW,0 cm)和波动水位(DW,从0 cm下降到45 cm,再复原到0 cm)]对高寒湿地二氧化碳(CO_2)、甲烷(CH_4)和氧化亚氮(N_2O)三种温室气体释放的影响。结果表明,1)高寒湿地水位变化对土壤(0~10 cm)可溶性有机碳(DOC)没有显著影响;水位从0 cm下降到45 cm,再复原到0 cm,对铵态氮(NH_4~+-N)和硝态氮(NO_3~--N)的转化起到了促进作用;2)水位变化对高寒湿地CO_2释放影响不显著,SW和DW处理下CO_2累积释放量分别为235.2和209.7 g/m~2;3)水位变化对CH_4释放有显著影响,CH_4累积释放量从SW处理的1.79 g/m~2下降到DW处理的0.86 g/m~2,下降了52.18%;4)水位波动处理抑制了N_2O的释放,其在SW和DW条件下的累积释放量分别是6.72和-7.36 mg/m~2;5)高寒湿地土壤温度在10 ℃以上,CO_2和CH_4释放量与其呈显著正相关性,水位下降提高了CO_2和CH_4释放与温度的拟合度。
其他语种文摘 A mesocosm experiment was conducted to study the effect of water table level on greenhouse gas (CO_2, CH_4, N_2O) emissions in alpine wetland on the Qinghai-Tibetan Plateau. Two treatments were adopted; stable water table (SW; about 0 cm or at soil surface) and dynamic water table (DW; 0 cm reducing to 45 cm and returning to 0 cm). The results showed that alpine wetland water table changes had no significant effect on soil dissolved organic carbon (DOC), but promoted transformations of ammonium (NH_4~+-N) and nitrate (NO_3~--N). The cumulative emissions of CO_2 were 235.2 and 209.7 g/m~2 for SW and DW treatment, respectively but were not significantly different. However, there was a significant treatment difference on CH_4 emissions. Cumulative emission of CH_4 for DW (0.86 g/m~2) decreased by 52.18%, compared with SW (1.79 g/m~2). The cumulative emission of N_2O for SW (6.72 mg/m~2) was significantly higher than that for DW (7.36 mg/m~2). There was a positive correlation between CO_2/CH_4 release and soil temperature in the alpine wetland with soil temperatures below about 10 ℃. The drop in the water table increased the sensitivity of CO_2/CH_4 release to soil temperature. Models of the response of CO_2, CH_4 and N_2O emissions to water table changes were different in alpine wetland on the Qinghai-Tibetan Plateau.
来源 草业学报 ,2016,25(8):27-35 【核心库】
DOI 10.11686/cyxb2016012
关键词 高寒湿地 ; 水位 ; 温室气体 ; DOC ; 全球变化
地址

中国科学院水利部成都山地灾害与环境研究所, 四川, 成都, 610041

语种 中文
文献类型 研究性论文
ISSN 1004-5759
学科 环境科学基础理论
基金 国家973计划 ;  国家自然科学基金项目
文献收藏号 CSCD:5780639

参考文献 共 26 共2页

1.  Bragg O M. Hydrology of peat-forming wetlands in Scotland. The Science of the Total Environment,2002,294(1/3):111-129 被引 2    
2.  Maltby E. Carbon dynamics in peatlands and other wetland soils:regional and global perspectives. Chemosphere,1993,27(6):999-1023 被引 62    
3.  高俊琴. 水分梯度对若尔盖高寒湿地土壤活性有机碳分布的影响. 水土保持学报,2008,22(3):126-131 被引 20    
4.  王根绪. 青藏高原草地土壤有机碳库及其全球意义. 冰川冻土,2002,24(6):694-698 被引 9    
5.  何奕忻. 青藏高原东北部5000年来气候变化与若尔盖湿地历史生态学研究进展. 生态学报,2014,34(7):1615-1625 被引 9    
6.  熊远清. 若尔盖湿地退化过程中土壤水源涵养功能. 生态学报,2011,31(19):5780-5788 被引 49    
7.  Gao Y H. Release of carbon and nitrogen from alpine soils during thawing periods in the eastern Qinghai-Tibet Plateau. Water, Air & Soil Pollution,2015,226:209 被引 3    
8.  Freeman C. Fluxes of CO_2, CH_4 and N_2O from a Welsh peatland following simulation of water table drawdown:potential feedback to climatic change. Biogeochemistry,1993,19(1):51-60 被引 22    
9.  高俊琴. 若尔盖高寒湿地土壤氮矿化对温度和湿度的响应. 湿地科学,2008,6(2):229-234 被引 32    
10.  Muhr J. Manipulative lowering of the water table during summer does not affect CO_2 emissions and uptake in a fen in Germany. Ecological Applications,2011,21(2):391-401 被引 9    
11.  Dinsmore K J. Effect of water table on greenhouse gas emissions from peatland mesocosms. Plant and Soil,2009,318(1/2):229-242 被引 20    
12.  Chimner R A. Influence of water table levels on CO_2 emissions in a Colorado subalpine fen:an in situ microcosm study. Soil Biology & Biochemistry,2003,35(3):345-351 被引 37    
13.  欧强. 滨海湿地不同水位梯度下的土壤CO_2通量比较. 应用与环境生物学报,2014,20(6):992-998 被引 15    
14.  青烨. 若尔盖高寒退化湿地土壤碳氮磷比及相关性分析. 草业学报,2015,24(3):38-47 被引 66    
15.  万忠梅. 水位对小叶章湿地CO_2、CH_4排放及土壤微生物活性的影响. 生态环境学报,2013,22(3):465-468 被引 20    
16.  汪浩. 青藏高原海北高寒湿地土壤呼吸对水位降低和氮添加的响应. 植物生态学报,2014,38(6):619-625 被引 18    
17.  Bubier J L. Predicting methane emission from bryophyte distribution in northern Canadian peatlands. Ecology,1995,76(3):677-693 被引 4    
18.  Hogg E H. Decay potential of hummock and hollow Sphagnum peats at different depths in a Swedish raised bog. Oikos,1993,66(2):269-278 被引 2    
19.  李英臣. 湿地土壤N_2O排放研究进展. 湿地科学,2008,6(2):124-129 被引 11    
20.  刘合满. 土壤呼吸日动态特征及其与大气温度、湿度的响应. 水土保持学报,2013,27(1):193-202 被引 16    
引证文献 10

1 孙翼飞 模拟水位下降与刈割对高寒湿地土壤氨氧化与反硝化微生物的影响 农业环境科学学报,2017,36(11):2356-2364
被引 3

2 张梦瑶 高寒湿地水体溶解性碳氮磷对水位变化的响应 环境科学与技术,2017,40(12):25-31
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