The Distribution of Bathyarchaeota in Surface Sediments of the Pearl River Estuary Along Salinity Gradient
The Distribution of Bathyarchaeota in Surface Sediments of the Pearl River Estuary Along Salinity Gradient
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珠江口表层沉积物中深古菌沿盐度梯度的分布
DOI：
10.3389/fmicb.2020.00285
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发表时间：
2020-02
影响因子：
5.2
通讯作者：
Li Meng
中科院分区：
文献类型：
--
作者：
Zou Dayu;Pan Jie;Liu Zongbao;Zhang Chuanlun;Liu Hongbin;Li Meng
Bathya chaeota是一个新近发现的古生物门，分布于全球，在缺氧沉积物中高度丰富。Bathya chaeota成员的代谢途径是多样的，因此，这个门被认为在全球生物地球化学循环中扮演着重要的角色。Bathya chaeota成员分布在河口环境中。然而，关于它们在珠江口(Pre)的详细群落结构、丰度和功能的信息有限。在目前的研究中，我们沿着盐度梯度对表层前沉积物中的古生物群落进行了全面的调查，重点是Bathya chaeota。Bathya chaeota是优势古生物门，深海16S rRNA基因丰度为1.43×108~1.22×109拷贝/g沉积物干重(D.W.)，Bathy-8为优势亚群。Pre中的另一个主要古菌群是Thaumarocota、Lokiarocota和Eurya chaeota，包括Thermoprofundales(MBG-D古生菌)。因此，研究了高盐度和低盐度沉积物中群落分布的差异。统计分析表明，除盐度外，氨氮和总有机碳是影响Pre中古细菌群落结构的最重要的环境因子，其中Bathya chaeota也是最重要的环境因子。古细菌网络表明Bathya chaeota、Lokiarcheota和Eurya chaeota之间存在共生关系，而Bathy-6与其他深海考古亚群显示出独特的相关性。这些观察表明，Bathya chaeota可能通过微生物-微生物的相互作用在生态系统功能中发挥作用，揭示了Bathy-6在富营养化河口沉积物中可能的不同生活方式。
Bathyarchaeota, a recently proposed archaeal phylum, is globally distributed and highly abundant in anoxic sediments. Metabolic pathways of the Bathyarchaeota members are diverse and, hence, this phylum has been proposed to play an important role in global biogeochemical cycles. Bathyarchaeota members are distributed in the estuarine environments. However, limited information is available about their detailed community structure, abundance, and functions in the Pearl River estuary (PRE). In the current study, we performed a comprehensive investigation of the archaeal community in the PRE surface sediments along a salinity gradient, with a focus on Bathyarchaeota. Bathyarchaeota was the dominant archaeal phylum, with the abundance of the bathyarchaeotal 16S rRNA gene ranging from 1.43 × 108 to 1.22 × 109 copies/g sediment dry weight (d.w.), and Bathy-8 was the dominant subgroup. Thaumarchaeota, Lokiarchaeota, and Euryarchaeota, including Thermoprofundales (MBG-D archaea), were the other major archaeal groups in the PRE. The differences of community distributions in the high- and low-salinity sediments were hence investigated. Statistical analysis revealed that besides salinity, ammonium, and total organic carbon were the most important environmental factors influencing the archaea community structure, including that of Bathyarchaeota, in the PRE. The archaeal network indicated the cooccurrence among Bathyarchaeota, Lokiarchaeota, and Euryarchaeota, while Bathy-6 presented unique correlations compared with other bathyarchaeotal subgroups. These observations indicate that Bathyarchaeota may play a role in ecosystem function through microbe–microbe interactions, revealing a possible different lifestyle for Bathy-6 in eutrophic estuarine sediments.
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DOI：
10.1038/s41396-018-0321-8
发表时间：
2018-12
期刊：
The ISME Journal
影响因子：
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作者：
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期刊：
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影响因子：
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影响因子：
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