文献类型：期刊文献

中文题名：模拟水位变化对杭州湾芦苇湿地夏季温室气体日通量的影响

英文题名：Effects of simulated water levels on diurnal variation in the emission of three greenhouse gases in reed wetlands in summer

作者：盛宣才[1] 吴明[1] 邵学新[1] 李长明[2] 梁雷[2] 叶小齐[1]

第一作者：盛宣才

机构：[1]中国林业科学研究院亚热带林业研究所,国家林业局杭州湾湿地生态系统定位观测研究站,杭州310036;[2]杭州师范大学生命与环境科学学院,杭州310036

年份：2016

卷号：36

期号：15

起止页码：4792-4800

中文期刊名：生态学报

外文期刊名：Acta Ecologica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家林业公益性行业科研专项(201404305,201404210);中国林科院基本科研业务费专项(CAFYBB2014MA002);国家“十二五”科技支撑计划专题(2012BAC13B02-2)

语种：中文

中文关键词：水位;温室气体;日变化;温度;pH;Eh

外文关键词：Water level ; Greenhouse gases ; diurnal variation ; temperature ; pH ; Eh

分类号：S718.5

摘要：水位是影响湿地温室气体排放的重要因子。采用静态箱-气相色谱法研究了模拟条件下不同水位(0、5、10 cm和20 cm)对芦苇湿地温室气体(CO_2、CH_4、N_2O)夏季昼夜通量变化的影响。结果表明,1)4种不同水位CO_2通量日变化均表现为昼低夜高,且白天为汇,夜间为源,整体均表现为CO_2的汇;不同水位CH_4通量日变化则均表现为昼高夜低,且整体上均表现为CH_4的源;N_2O通量总体上水淹后均表现为昼高夜低而0cm水位表现为昼低夜高;2)随着水位的增加CH_4和CO_2平均通量呈现先增加后降低的趋势,且10cm水位下CH_4和CO_2平均通量最高,N_2O通量则在5cm水位最高;3)通过相关性和主成分分析表明,气温、水温是土壤CH_4、N_2O通量日变化的主导因子,而土壤温度是CO_2日变化通量的主导因子,同时,土壤p H、Eh及水体p H、Eh是CO_2通量日变化的重要因子之一。
Water level affects greenhouse gas fluxes in wetlands. A static chamber-gas chromatographic technique was used to study the release of three greenhouse gases, CO2, CH4, and N2O at simulated water levels （0, 5, 10, and 20 cm） of reed wetlands in the Hangzhou Bay area. The results indicated that, 1 ） the CO2 flux was higher at night and lower during the day--acting as sink during daytime and source at night--with a net flux as sink of CO2 irrespective of water level. CH4 was lower at night and higher during the day with a net flux as source of CO2. N2O flux was lower at night but higher during the day, except at 0 cm; 2） the CH4 flUX and the CO2 flux increased, followed by a decrease, with increasing water level. The water levels for the highest average fluxes were 10 cm for CH4 and 5 cm for CO2; and 3 ） correlation and principal component analysis showed that water temperature was the dominant factor for the daily variation in soil CH4 and N2O flux, and soil temperature was the dominant factor for the daily variation in CO2 flux. Meanwhile, soil pH, soil Eh, water pH, and water Eh were all important factors for the variation in CO2flux.