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首页> 外文期刊>Applied Microbiology >Diversity, Abundance, and Spatial Distribution of Sediment Ammonia-Oxidizing Betaproteobacteria in Response to Environmental Gradients and Coastal Eutrophication in Jiaozhou Bay, China
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Diversity, Abundance, and Spatial Distribution of Sediment Ammonia-Oxidizing Betaproteobacteria in Response to Environmental Gradients and Coastal Eutrophication in Jiaozhou Bay, China

机译：胶州湾沉积物氨氧化性贝塔蛋白细菌的多样性，丰度和空间分布对环境梯度和沿海富营养化的响应

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Ongoing anthropogenic eutrophication of Jiaozhou Bay offers an opportunity to study the influence of human activity on bacterial communities that drive biogeochemical cycling. Nitrification in coastal waters appears to be a sensitive indicator of environmental change, suggesting that function and structure of the microbial nitrifying community may be associated closely with environmental conditions. In the current study, the amoA gene was used to unravel the relationship between sediment aerobic obligate ammonia-oxidizing Betaproteobacteria (Beta-AOB) and their environment in Jiaozhou Bay. Protein sequences deduced from amoA gene sequences grouped within four distinct clusters in the Nitrosomonas lineage, including a putative new cluster. In addition, AmoA sequences belonging to three newly defined clusters in the Nitrosospira lineage were also identified. Multivariate statistical analyses indicated that the studied Beta-AOB community structures correlated with environmental parameters, of which nitrite-N and sediment sand content had significant impact on the composition, structure, and distribution of the Beta-AOB community. Both amoA clone library and quantitative PCR (qPCR) analyses indicated that continental input from the nearby wastewater treatment plants and polluted rivers may have significant impact on the composition and abundance of the sediment Beta-AOB assemblages in Jiaozhou Bay. Our work is the first report of a direct link between a sedimentological parameter and the composition and distribution of the sediment Beta-AOB and indicates the potential for using the Beta-AOB community composition in general and individual isolates or environmental clones in the Nitrosomonas oligotropha lineage in particular as bioindicators and biotracers of pollution or freshwater or wastewater input in coastal environments.
机译：胶州湾持续的人为富营养化为研究人类活动对驱动生物地球化学循环的细菌群落的影响提供了机会。沿海水域的硝化作用似乎是环境变化的敏感指标，表明微生物硝化群落的功能和结构可能与环境条件密切相关。在当前的研究中，amoA基因用于揭示胶州湾沉积物好氧性专性氨氧化贝塔蛋白细菌（Beta-AOB）与周围环境之间的关系。从aomoA基因序列推导的蛋白质序列分为亚硝基梭菌谱系的四个不同簇，包括一个推定的新簇。另外，还鉴定了属于亚硝基螺菌谱系中三个新定义的簇的AmoA序列。多元统计分析表明，所研究的Beta-AOB群落结构与环境参数相关，其中亚硝酸盐氮和沉积物沙含量对Beta-AOB群落的组成，结构和分布具有重要影响。 amoA克隆文库和定量PCR（qPCR）分析均表明，附近废水处理厂和污染河流的大陆输入可能对胶州湾沉积物Beta-AOB组合的组成和丰度产生重大影响。我们的工作是第一个关于沉积学参数与沉积物Beta-AOB的组成和分布之间直接联系的报告，并指出了在低嗜盐亚种（Nitrosomonas oligotrophapha）世系的一般分离株或环境分离株中使用Beta-AOB群落组成的潜力特别是在沿海环境中作为污染或淡水或废水输入的生物指示剂和生物示踪剂。

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