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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 被引量:10

Effect of Salinity on Production and Emission of Greenhouse Gases in Estuarine Tidal Wetlands:A Review
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摘要 盐度是影响河口潮汐湿地温室气体动态的一个重要的环境因子。本文论述了盐度对河口潮汐湿地温室气体的产生和排放的影响及机制。盐水入侵通过带来丰富的SO42-引起的硫酸盐效应、离子强度增加引起的离子效应影响CH4和CO2的产生。盐水入侵通过影响湿地的硝化作用、反硝化作用及硝化细菌反硝化作用进而影响N2O产生量,影响方式主要包括:(1)通过物理化学机制加强沉积物中铵的释放;(2)通过生理机制增加沉积物氮素释放量,直接影响硝化细菌、反硝化细菌活性,进而影响硝化作用和反硝化作用;(3)通过提高硝酸盐异化还原为铵的速率影响反硝化速率。最后提出了今后应加强研究的方向。 Salinity is an important environmental factor affecting dynamics of greenhouse gases of estuarine tidal wetlands.CH4 and CO2production is influenced by abundant SO42-and increased ionic stress with saltwater intrusion.Saltwater intrusion affects the amount of N2 O production by nitrification,denitrification and nitrification-denitrification bacteria.Three main mechanisms include to enhance ammonium release from sediment by physical and chemical process;to increase nitrogen release from sediment by physiological process,further affect nitrification,denitrification by direct effects on nitrifying bacteria,denitrifying bacteria activity;to strengthen rate of dissimilatory nitrate reduction to ammonium.Finally,the direction of future research was strengthened.
出处 《湿地科学》 CSCD 北大核心 2014年第6期814-820,共7页 Wetland Science
基金 国家自然科学基金项目(41371127) 福建师范大学校级创新团队项目(IRTL1205) 福建省科技厅优势领域重点项目(2014R1101) 福建师范大学地理科学学院研究生科研创新基金项目资助
关键词 盐度 温室气体 产生与排放 机制 河口潮汐湿地 salinity greenhouse gases production and emission mechanism estuarine tidal wetlands
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