九段沙湿地潮间带水域有机碳与无机碳含量的空间分布特征  

The Spatial Distribution Characteristics of Organic and Inorganic Carbon Content of Intertidal Water in Jiuduansha Wetland

作　　者：唐玉姝[1,2,3] 王磊[1] 席雪飞[1] 胡煜[1] 张艳楠[1] 陈金海[1] 陈秀芝 孙瑛 

机构地区：[1]同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室,上海200092 [2]上海市农业科技服务中心 [3]上海市科技兴农重点攻关项目管理办公室,上海200335 [4]上海市九段沙湿地自然保护区管理署,上海200135

出　　处：《农业环境科学学报》2012年第12期2459-2465,共7页Journal of Agro-Environment Science

基　　金：国家科技支撑计划项目(2010BAK69B13);上海市重大科技攻关项目(10dz1200803);上海市重大科技攻关项目(10dz1200805)

摘　　要：研究分析了九段沙3个主要沙洲潮间带水域有机与无机碳含量的空间分布特征。结果表明,九段沙湿地各沙洲潮间带水域有机碳含量之间有差异但不显著,无机碳含量从江亚南沙到下沙依次显著降低(P<0.05);不同深度(-1、-3、-5m)的有机和无机碳含量分布均无显著差异,但随深度逐渐减小。综合考虑有机碳和无机碳发现,江亚南沙潮间带水域的碳含量最高。从江亚南沙至下沙,盐度和pH也有较显著变化。潮间带水域沉积物中细菌群落多样性为江亚南沙>下沙>上沙,且与有机碳含量呈显著负相关。上沙潮间带水域有机碳最高可能是因为随着向海洋的过渡,浑浊度下降,透光性增强,有利于光合作用,水中的盐分又不至于使溶解态有机碳发生絮凝,且缺乏具有高有机碳降解能力的β-proteobacteria。江亚南沙潮间带水域无机碳最高可能是由于较低的盐度使其维持了界面较高浓度的CO2,且使得溶解态的无机碳不易发生沉降。Global warming caused by elevated atmospheric CO 2 concentration has been one of the most seriously environmental problems the human beings are facing at present.An undisturbed natural wetland is considered as a very important ＂ Carbon Sink＂.Jiuduansha Wetland with its carbon sequestration functions is of great significance to the balance of Shanghai carbon emissions.Clarfying the carbon content of intertidal water is of great meaning to understand the carbon sink and storage of Jiuduansha Wetland.In the experiment,the inorganic and or-ganic carbon contents of three different types of intertidal water body in Jiuduansha Wetland were analyzed.The results showed that there were differences but non-significant in organic carbon content among three intertidal water.The inorganic carbon content decreased from Jiangyanansha to Xiasha（P0.05）.There were differences but also non-significant in organic and inorganic carbon among different depths（-1 m,-3 m and-5 m） and decreased from above to below.Both considering of organic and inorganic carbon content,intertidal water area of Jiangyanansha has the highest carbon capacity among three intertidal water areas.From Jiangyanansha to Xiasha,water salinity and pH were also significantly different.The bacterical community diversity of three intertidal water was JiangyananshaXiashaShangsha,and has a sig-nificant correlation with organic carbon content in intertidal water.The highest organic carbon content occurred in intertidal water area of Shangsha due to lack of heterotrophic β-proteobacteria there.This might be because intertidal water area of Shangsha has higher light trans-mission efficiency due to lower sands comparing to Jiangyanansha,and lower salinity comparing to Xiasha,which was beneficial for photo-synthesis.The highest inorganic carbon in intertidal water of Jiangyanansha might be because the lower salinity kept the higher dissolved CO 2 concentration,as well as let the dissolved inorganic carbon suspension.

关 键 词：河口湿地 碳循环 碳汇 克隆文库 

分 类 号：X832[环境科学与工程—环境工程]