[1]聂兰琴,付姗,吴琴,等.鄱阳湖典型沉水植物分布区CO_2、CH_4释放日变化特征[J].江西师范大学学报(自然科学版),2014,(04):429-433.
 NIE Lan-qin,FU Shan,WU Qin,et al.The Diurnal Variation of Carbon Dioxide and Methane Enission fron TyPical Subnerged Plant Zone in Poyang Lake[J].,2014,(04):429-433.
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鄱阳湖典型沉水植物分布区CO_2、CH_4释放日变化特征()
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《江西师范大学学报》(自然科学版)[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2014年04期
页码:
429-433
栏目:
出版日期:
2014-08-31

文章信息/Info

Title:
The Diurnal Variation of Carbon Dioxide and Methane Enission fron TyPical Subnerged Plant Zone in Poyang Lake
作者:
聂兰琴;付姗;吴琴;胡启武
江西师范大学地理与环境学院,江西 南昌,330022
Author(s):
NIE Lan-qin;FU Shan;WU Qin;HU Qi-wu
关键词:
鄱阳湖沉水植物区CO2CH4
Keywords:
Poyang lakesubmerged plants zonecarbon dioxidemethane
分类号:
Q149
文献标志码:
A
摘要:
为进一步准确评估鄱阳湖湿地碳平衡,探讨不同湿地类型碳排放特征与控制因子,在鄱阳湖南矶湿地国家级自然保护区选择典型沉水植物分布区进行了 CO2、CH4释放的昼夜变化观测.结果表明:1)CO2、CH4释放均具有明显的单峰型日变化模式,释放速率变化范围分别为172.43~365.40 mg CO2· m -2·h -1、16.92~31.57 mg CH4·m -2·h -1;2)温度是影响 CO2、CH4释放的主要因子,CO2释放速率与土壤温度之间相关性最显著,而 CH4释放速率与水温相关性最显著;CO2释放基于气温和土壤温度的敏感性指数 Q 10分别为2.6,3.0;3)观测日沉水植物分布区碳排放以 CO2为主,约占总碳排放的77.2;,CH4约占22.8;,考虑到两者的增温潜能,沉水植物区 CH4释放引起的温室效应高于 CO2.
Abstract:
For further accurate evaluation of carbon balance in Poyang lake wetland,and to discuss the characteris-tics and control factors of carbon emissions from different wetland types. Carbon dioxide( CO2 )and methane (CH4 )fluxes were measured in a wetland dominated by submerged plant species in the national nature reserve, Nanji wetlands of Poyang Lake. Our results indicated that both CO2 and CH4 showed clear diurnal variation pattern. The emission rate of CO2 ranged from 172. 43 to 365. 40 mg·m - 2 ·h - 1 . The flux rate of CH4 varied from 16. 92 to 31. 57 mg·m - 2 ·h - 1 . Moreover,temperature was the main effect factor of CO2 and CH4 fluxes. The flux rate of CO2 was significantly positively related to soil temperature. But CH4 emission showed significant positive correlation with water temperature. The value of Q10 which reflected temperature sensitivity of CO2 emission was 2. 6 for air tempera-ture and 3. 0 for soil temperature,respectively,which suggested CO2 emission from submerged plants zones was more sensitive to soil temperature change than air temperature. Additionally,on the measurement day,CO2 and CH4 ac-counted for 77. 2; and 22. 8; of total carbon emission,respectively. However,due to much higher global warming potential of CH4 than CO2 ,CH4 contributed more than CO2 in greenhouse effect for submerged plants zones.

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备注/Memo

备注/Memo:
国家自然科学基金(31270522,40803022);江西省教育厅青年基金(GJJ13212);江西省研究生创新基金(YC2013-S076)
更新日期/Last Update: 1900-01-01