Metagenomic Views of Microbial Communities in Sand Sediments Associated with Coral Reefs
Metagenomic Views of Microbial Communities in Sand Sediments Associated with Coral Reefs
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与珊瑚礁相关的沙沉积物中微生物群落的宏基因组观点
DOI：
10.1007/s00248-021-01957-8
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发表时间：
2022-02-03
影响因子：
3.6
通讯作者：
Yang, Ying
中科院分区：
文献类型：
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作者：
Dong, Xiyang;Lan, Haoyu;Yang, Ying
珊瑚礁沉积物是高丰度微生物的家园，为珊瑚礁的生长和维持提供了重要的碳酸盐和营养物质来源。然而，目前缺乏系统的研究，在不同的地理位置的沉积物中的微生物群落的组成及其对营养循环和珊瑚礁生态系统的健康的潜在影响。结合生物地球化学测量与基因和基因组为中心的宏基因组学，我们评估了微生物群落组成和功能多样性，以及抗生素耐药基因在南海西沙群岛的16个珊瑚礁站点在不同深度的表层沉积物的配置文件。珊瑚礁沉积物微生物群落是多样的和新的较低的分类等级，占主导地位的变形菌和浮游菌。大多数礁沉积物细菌可能通过氧化各种有机和无机化合物作为能源参与生态地球化学循环。高丰度的变形菌门（主要是根瘤菌目和维酵母目）具有代谢灵活性，并含有视紫红质基因。不同种类的抗生素耐药基因，由不同的细菌谱系，被确定为赋予耐药性的多药，氨基糖苷类，和其他抗生素。总体而言，我们的发现扩大了对珊瑚礁沉积物微生物生态学的了解，并为它们与珊瑚礁生态系统健康的联系提供了见解。
Reef sediments, the home for microbes with high abundances, provide an important source of carbonates and nutrients for the growth and maintenance of coral reefs. However, there is a lack of systematic research on the composition of microbial community in sediments of different geographic sites and their potential effect on nutrient recycling and health of the coral reef ecosystem. In combination of biogeochemical measurements with gene- and genome-centric metagenomics, we assessed microbial community compositions and functional diversity, as well as profiles of antibiotic resistance genes in surface sediments of 16 coral reef sites at different depths from the Xisha islands in the South China Sea. Reef sediment microbiomes are diverse and novel at lower taxonomic ranks, dominated by Proteobacteria and Planctomycetota. Most reef sediment bacteria potentially participate in biogeochemical cycling via oxidizing various organic and inorganic compounds as energy sources. High abundances of Proteobacteria (mostlyRhizobialesandWoeseiales) are metabolically flexible and contain rhodopsin genes. Various classes of antibiotic resistance genes, hosted by diverse bacterial lineages, were identified to confer resistance to multidrug, aminoglycoside, and other antibiotics. Overall, our findings expanded the understanding of reef sediment microbial ecology and provided insights for their link to the coral reef ecosystem health.