Microbial Community Composition and Function in Sediments from the Pearl River Mouth Basin
Microbial Community Composition and Function in Sediments from the Pearl River Mouth Basin
复制标题
珠江口盆地沉积物中微生物群落组成及功能
DOI：
10.1007/s11802-020-4225-7
复制
发表时间：
2020-08-01
影响因子：
1.6
通讯作者：
Zhen Yu
中科院分区：
文献类型：
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作者：
Chen Ye;Mi Tiezhu;Zhen Yu
对南海珠江口海盆沉积物中微生物群落的多样性和功能进行了研究。结果表明，细菌和古细菌群落随深度的变化较大。浅层沉积物（1 ~ 40 cm）以细菌群落中的变形菌属、亚硝基藻属和古细菌群落中的Woesearchaeota为主，深层沉积物（50 ~ 200 cm）以细菌群落中的Chloroflexi和古细菌群落中的Bathyarchaeia为主。在生态功能方面，基于亚转录组学数据，在所测沉积物样品中观察到参与氮代谢和硫代谢各种途径的基因。宏基因组分析显示变形菌门对几乎所有参与氮和硫代谢的基因贡献最多。此外，Thaumarchaeota对参与硝化、反硝化和同化硫酸盐还原途径的某些基因贡献最大。最丰富的细菌属，Candidatus Scalindua，对硝化，异化硝酸盐还原，反硝化和同化硫酸盐还原途径至关重要。
This study was conducted to characterize the diversity and function of microbial communities in marine sediments of the Pearl River Mouth Basin (PRMB) in the South China Sea. The results showed that the bacterial and archaeal communities varied greatly with depth. Proteobacteria in bacterial communities and Nitrososphaeria and Woesearchaeota in archaeal communities were dominant in the shallow sediments (1-40 cm), while Chloroflexi in bacterial communities and Bathyarchaeia in archaeal communities were dominant in the deep sediments (50-200 cm). Regarding ecological functions based on the metatranscriptomic data, genes involved in various pathways of nitrogen metabolism and sulfur metabolism were observed in the tested sediment samples. Metagenomic analysis revealed that Proteobacteria contribute the most to nearly all genes involved in nitrogen and sulfur metabolism. Moreover, Thaumarchaeota contribute the most to certain genes involved in nitrification, denitrification and assimilatory sulfate reduction pathways. The most abundant bacterial genus,Candidatus Scalindua, is crucial for nitrification, dissimilatory nitrate reduction, denitrification and assimilatory sulfate reduction pathways.