Nitrogen nutrient salts are considered the major environmental factors (RNH4+-N0.92, RTN0.85) affecting the structure and distribution of denitrogen bacteria. We aimed to investigate the mechanisms by which wetland bacteria adapt to environmental factors in different types of habitats. High-throughput sequencing technology was used to study the microbial community structure of sediments in three wetland habitats [fish ponds, surface flow wetlands (cattails and reeds), and ditches] of the Yongding River, China. The microbial community structure differed across different habitats. Species richness of nitrifying bacteria increased, while that of denitrifying bacteria decreased, with ammonium salt and total nitrogen concentrations increasing from surface flow wetland to ditch wetland. The characteristics of the three habitat types and their distribution in the Yongding River wetland are beneficial to the differential distribution of microbial communities across the wetland, and to the existence and denitrification of different dominant bacteria. Overall, these results help explain the natural filtering function of wetlands.

中文翻译：

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永定河湿地不同生境的反硝化细菌特征

氮营养盐被认为是影响脱氮细菌结构和分布的主要环境因素（RNH4 + -N0.92，RTN0.85）。我们旨在研究湿地细菌适应不同类型栖息地环境因素的机制。高通量测序技术被用来研究永定河三个湿地生境[鱼塘，地表流湿地（香蒲和芦苇）和沟渠]中的沉积物微生物群落结构。不同生境的微生物群落结构不同。从地表流湿地到沟渠湿地，铵盐和总氮浓度增加，硝化细菌的物种丰富度增加，反硝化细菌的物种丰富度下降。永定河湿地三种生境类型的特征及其分布，有利于整个湿地微生物群落的差异分布，有利于优势菌的存在和反硝化。总体而言，这些结果有助于解释湿地的自然过滤功能。