Spatial variation in bacterial community in natural wetland-river-sea ecosystems.
Spatial variation in bacterial community in natural wetland-river-sea ecosystems.
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自然湿地-河海生态系统细菌群落的空间变异
DOI：
10.1002/jobm.201700041
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Liu Fanghua
中科院分区：
文献类型：
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作者：
Zhang Hongxia;Zheng Shiling;Ding Jiawang;Wang Oumei;Liu Fanghua
湿地-河口-海洋环境是典型的好氧/缺氧过渡区，在淡水与海水相互作用的混合区内具有复杂的水流路径。人们对这种相互作用对细菌群落结构的影响或在这种过渡混合环境中细菌群落与地球化学因素之间的关系知之甚少。因此，我们通过分析13个有序站点的39个样品，调查了黄河口-滨海湿地-渤海过渡区细菌群落的分布格局和多样性。 16S rRNA基因的高通量测序揭示了从黄河口到渤海沉积物中细菌群落多样性和分布的显着变化。黄河沉积物以氢、氮、铁循环细菌为主，如噬氢菌、硝化螺菌、假单胞菌和硫杆菌。滨海湿地存在不同功能的盐菌群落，如浮霉菌、海杆菌、盐单胞菌、盐弧菌、盐杆菌等。渤海沉积物中Lutimonas、Desulfococcus、Photobacteria、Propionigenium和Vibrio的相对丰度较高。细菌群落的空间变化与此类沿海环境中的 pH、盐度和硫酸盐浓度相关。湿地、河口和沿海海洋生态系统的主要细菌类群存在显着差异，表明这三个生态系统之间存在显着的空间异质性。统计分析揭示了细菌群落结构的变化与生态系统类型之间的密切联系。我们的结果证明了地理和地球化学因素在构建自然环境中细菌群落中的重要性。
Wetland‐estuarine‐marine environments are typical oxic/anoxic transition zones and have complex water flow‐paths within the zone of mixing where freshwater interacts with ocean water. Little is known about the impact of this interaction on bacterial community structures or the relationship between bacterial community and geochemical factors in such transitional mixing environments. Hence, we investigated the distribution patterns and diversity in bacterial communities in the Yellow River estuary‐coastal wetland‐Bohai Sea transition zone by analyzing 39 samples from 13 ordered sites. High‐throughput sequencing of the 16S rRNA gene revealed significant shifts in diversity and distribution of bacterial community in sediments from the Yellow River estuary to the Bohai Sea. Yellow River sediment was dominated by hydrogen‐, nitrogen‐, and iron‐cycling bacteria, such asHydrogenophaga,Nitrospira,Pseudomonas, andThiobacillus. The coastal wetland had a haloduric community associated with different functions, such asPlanctomyces,Marinobacter,Halomonas,Salinivibrio, andSalinibacter. The Bohai Sea sediment had a higher relative abundance ofLutimonas,Desulfococcus,Photobacterium,Propionigenium, andVibrio. Spatial variation in bacterial community was correlated with pH, salinity and sulfate () concentration in such coastal environments. The major bacterial taxa were significantly different across the wetland, estuary, and coastal marine ecosystems, indicating substantial spatial heterogeneity among the three ecosystems. Statistical analysis revealed strong links between variation in bacterial community structure and ecosystem type. Our results demonstrate the importance of geographic and geochemical factors in structuring the bacterial community in natural environments.