| 长江口潮滩土壤呼吸季节变化及其影响因素 |
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| 引用本文： | 聂明华,刘敏,侯立军,林啸,李勇,晏彩霞,杨毅.长江口潮滩土壤呼吸季节变化及其影响因素[J].环境科学学报,2011,31(4):824-831. |
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| 作者姓名： | 聂明华 刘敏 侯立军 林啸 李勇 晏彩霞 杨毅 |
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| 作者单位： | 1. 华东师范大学资源与环境科学学院,教育部地理信息科学重点实验室,上海,200062
2. 华东师范大学河口海岸学国家重点实验室,上海,200062 |
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| 基金项目： | 国家自然科学基金项目，中央高校基本科研业务费专项基金资助项目，海洋公益性行业科研专项经费项目 |
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| 摘 要： | 采用静态箱-气相色谱法,于2007年7月至2008年5月对长江口潮滩土壤呼吸通量进行了观测,同时对潮滩气温、土壤温度、近岸水体盐度等环境参数进行了观测.结果表明,长江口潮滩上壤是大气CO2的排放源.土壤呼吸速率具有明妊的季节变化规律,呈单峰形变化.并于7～8月出现排放峰值.气温和各层土壤温度与士壤呼吸速率作用之间具有显...
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| 关 键 词： | 长江口潮滩 土壤呼吸 季节变化 温度 土壤含水量 近岸水体盐度 |
| 收稿时间： | 7/6/2010 12:00:00 AM |
| 修稿时间： | 9/5/2010 12:00:00 AM |
Seasonal variation of soil respiration and its influence factors in tidal flat of Yangtze Estuary |
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| NIE Minghu,LIU Min,HOU Lijun,LIN Xiao,LI Yong,YAN Caixia and YANG Yi.Seasonal variation of soil respiration and its influence factors in tidal flat of Yangtze Estuary[J].Acta Scientiae Circumstantiae,2011,31(4):824-831. |
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| Authors: | NIE Minghu LIU Min HOU Lijun LIN Xiao LI Yong YAN Caixia and YANG Yi |
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| Institution: | Department of Geography, Key Laboratory of Geographic Information Science of the Ministry of Education, East China Normal University, Shanghai 200062,Department of Geography, Key Laboratory of Geographic Information Science of the Ministry of Education, East China Normal University, Shanghai 200062,State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062,Department of Geography, Key Laboratory of Geographic Information Science of the Ministry of Education, East China Normal University, Shanghai 200062,Department of Geography, Key Laboratory of Geographic Information Science of the Ministry of Education, East China Normal University, Shanghai 200062,Department of Geography, Key Laboratory of Geographic Information Science of the Ministry of Education, East China Normal University, Shanghai 200062 and Department of Geography, Key Laboratory of Geographic Information Science of the Ministry of Education, East China Normal University, Shanghai 200062 |
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| Abstract: | Soil respiration in the tidal flat of Yangtze Estuary was investigated from July 2007 to May 2008,using a static chamber combined with a gas chromatograph.Environmental factors including air temperature,soil temperature,soil water content and coastal water salinity were also measured during the sampling periods.The results showed that soils from the tidal flat of the Yangtze Estuary were net sources of atmospheric CO2,and soil respiration fluctuated with distinct seasonal patterns.Seasonal variation of soil respiration was characterized by a mono-peak pattern with the highest rate in July through August.Soil respiration was observed to significantly correlate to air temperature and soil temperature,probably indicating that soil respiration at the study area was predominantly controlled by air temperature and soil temperature.In contrast,no significant correlation was found between soil respiration and soil water content.The highest soil respiration rate appeared at Station WSK,followed by BLG,DHand FX.This spatial difference in soil respiration implied that soil respiration rates generally decreased with the increasing water salinity.In conclusion,the seasonal change of soil respiration in the Yangtze Estuary was co-effected mainly by temperature and water salinity. |
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| Keywords: | tidal flat of the Yangtze Estuary soil respiration seasonal variation temperature soil water content coastal water salinity |
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