Sun Wei, Jiao Lijing, Wu Jiapeng, Ye Jiaqi, Wei Mingken, Hong Yiguo
Guangdong University of Petrochemical Technology, Maoming 525000, P.R.China.
Institute of Environmental Research at Greater Bay Area, Guangzhou University, Guangzhou 510006, P.R. China.
iScience. 2022 Aug 8;25(9):104895. doi: 10.1016/j.isci.2022.104895. eCollection 2022 Sep 16.
In the biological nitrogen cycle, nitrite oxidation is performed by nitrite oxidation bacteria, of which is widespread and diverse. Communities of were collected at 25-1500 m depths in the South China Sea. Phylogenetic diversity, community composition, and environmental factors were investigated using high-throughput sequencing targeting the B gene and statistical analyses. The community composition of varied spatially and by depth. Among the 24 OTUs with relatively high abundance, 70% were unclassified and not affiliated with the known genus, suggesting a previously unrecognized high diversity of marine . Five known genera were detected, of which the common marine was not the dominant species, whereas and dominated in shallow habitats. Comammox Nitrospira nitrosa was discovered in the marine ecosystem. The niche differentiation of versatile species was mainly shaped by nitrate, temperature, and DO.
在生物氮循环中，亚硝酸盐氧化由亚硝酸盐氧化细菌进行，这类细菌分布广泛且种类多样。在南海25 - 1500米深度采集了亚硝酸盐氧化细菌群落。使用针对B基因的高通量测序和统计分析方法，研究了系统发育多样性、群落组成和环境因素。亚硝酸盐氧化细菌的群落组成随空间和深度而变化。在24个相对丰度较高的操作分类单元（OTU）中，70%未分类且与已知的亚硝酸盐氧化细菌属无关，这表明海洋亚硝酸盐氧化细菌存在此前未被认识到的高度多样性。检测到了5个已知的亚硝酸盐氧化细菌属，其中常见的海洋亚硝酸盐氧化细菌不是优势物种，而硝化螺旋菌属和硝化刺菌属在浅海栖息地占主导地位。在海洋生态系统中发现了完全氨氧化菌硝化螺菌。多功能亚硝酸盐氧化细菌物种的生态位分化主要受硝酸盐、温度和溶解氧的影响。
