Differences in distributions, assembly mechanisms, and putative interactions of AOB and NOB at a large spatial scale

文献类型： 外文期刊

第一作者： Zhang, Bing

作者： Zhang, Bing;Lin, Huimin;Chen, Tan;Yang, Ting;Zhang, Bing;Sun, Chenxiang;Liu, Wei;Qin, Wentao;Wen, Xianghua;Qin, Wentao

作者机构：

关键词： Activated sludge; Spatial distributions; Microbial assembly; Co-occurrence patterns; Nitrifying bacteria

期刊名称：FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING （ 影响因子：6.4； 五年影响因子：5.6 ）

ISSN： 2095-2201

年卷期： 2023 年 17 卷 10 期

页码：

收录情况： SCI

摘要： Ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) play crucial roles in removing nitrogen from sewage in wastewater treatment plants (WWTPs) to protect water resources. However, the differences in ecological properties and putative interactions of AOB and NOB in WWTPs at a large spatial scale remain unclear. Hence, 132 activated sludge (AS) samples collected from 11 cities across China were studied by utilizing 16S rRNA gene sequencing technology. Results indicated that Nitrosomonas and Nitrosospira accounted for similar ratios of the AOB community and might play nearly equal roles in ammonia oxidation in AS. However, Nitrospira greatly outnumbered other NOB genera, with proportions varying from 94.7% to 99.9% of the NOB community in all WWTPs. Similar compositions and, hence, a low distance-decay turnover rate of NOB (0.035) across China were observed. This scenario might have partly resulted from the high proportions of homogenizing dispersal (similar to 13%). Additionally, drift presented dominant roles in AOB and NOB assembling mechanisms (85.2% and 81.6% for AOB and NOB, respectively). The partial Mantel test illustrated that sludge retention time and temperature were the primary environmental factors affecting AOB and NOB communities. Network results showed that NOB played a leading role in maintaining module structures and node connections in AS. Moreover, most links between NOB and other microorganisms were positive, indicating that NOB were involved in complex symbioses with bacteria in AS.

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