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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

Keywords: 河口湿地,碳循环,碳汇,克隆文库

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Abstract:

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。

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