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铁异化还原在滨海潮滩沉积物的铁、硫和碳等元素生物地球化学循环过程中起着重要作用。滨海潮滩独特的地形、水文、植被和底栖生物扰动现象,使得其铁异化还原过程具有高度的时空异质性。加强滨海潮滩铁异化还原的研究,不仅能够深入理解其有机质厌氧氧化过程,同时也为估算滨海湿地温室气体排放提供重要的依据。本文在总结滨海潮滩铁异化还原对有机质厌氧氧化贡献的基础上,回顾了铁异化还原过程的有机质底物、Fe(III)的形态和空间分布、铁异化还原微生物、铁异化还原与硫酸根异化还原竞争以及铁异化还原的时间变化等方面的研究进展,提出了未来在中国滨海潮滩铁异化还原过程研究方面应加强的工作。
Iron dissimilatory reduction plays an important role in biogeochemical cycling of elements such as iron, sulfur and carbon in coastal tidal flat sediments. The unique topography, hydrology, vegetation and benthic disturbances in coastal tidal flats make the process of iron dissimilatory reduction highly time-space heterogeneous. The research on enhancing the alienation reduction of coastal tidal flats can not only deeply understand the anaerobic oxidation process of organic matter, but also provide an important basis for estimating greenhouse gas emissions in coastal wetlands. In this paper, based on the contribution of dissimilatory reduction of coastal tidal flats to the anaerobic oxidation of organic matter, the morphological and spatial distribution of Fe (III), an iron-degrading microorganism, iron dissimilatory reduction and sulfuric acid Root dissimilatory reduction competition as well as iron dissimilatory reduction time changes and other aspects of research progress, put forward in the future of China’s coastal tidal flat iron dissimilatory reduction process should be strengthened work.