Dynamics of fungi and the connection with bacteria in removing nutrients from mariculture wastewater in the integrated bioremediation systems

IF 4.1 2区 环境科学与生态学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Yingzhen Wei, Ding Shen, Wen Yang, Zhongming Zheng
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Abstract

The bacterial community has received major attention in the research on the treatment of mariculture wastewater, while the fungal community has rarely been mentioned. To fill gap, an integrated bioremediation system (IBS) was built and the fungal community was identified by high-throughput sequencing in this study. Dimension reduction analysis, network analysis, community construction analysis were used to reveal the dynamic changes, interactions, and construction process of fungal communities in each treatment unit. The results showed that after a whole set of systematic and continuous treatments, the nutrient content in mariculture wastewater reached the lowest level. The fungal community was closely related to total nitrogen (TN), total phosphorus (TP), NO3-N, and NH4+-N. In biofilm and shellfish units, Ascomycota was dominant, while in macroalgae units, Chytridiomycota was dominant. The community β-diversity of brush, ceramsite, and shellfish units showed similar trends in three time periods. In addition, some fungi showed a significant positive correlation with denitrifying bacteria, and this symbiotic relationship needs to be further studied. Finally, in the process of community construction, IBS was dominated by the stochastic process. This study aimed to more comprehensively interpret the dynamic changes of the microbial community in the mariculture wastewater treatment system and provided the theoretical reference for better understanding its potential mechanism and optimizing its process in the future.

Abstract Image

在综合生物修复系统中,真菌在去除海产养殖废水中的营养物质时的动态以及与细菌的联系
在处理海水养殖废水的研究中,细菌群落受到了广泛关注,而真菌群落却很少被提及。为了填补这一空白,本研究建立了一个综合生物修复系统(IBS),并通过高通量测序鉴定了真菌群落。通过降维分析、网络分析和群落构建分析,揭示了各处理单元中真菌群落的动态变化、相互作用和构建过程。结果表明,经过一整套系统、连续的处理后,海水养殖废水中的营养物质含量达到最低水平。真菌群落与总氮(TN)、总磷(TP)、NO-N 和 NH-N 密切相关。在生物膜和贝类单元中,真菌占优势,而在大型藻类单元中,真菌占优势。灌木丛、陶瓷岩和贝类单元的群落 β 多样性在三个时间段内呈现出相似的趋势。此外,一些真菌与反硝化细菌呈显著正相关,这种共生关系有待进一步研究。最后,在群落构建过程中,IBS 以随机过程为主。本研究旨在更全面地解读海水养殖废水处理系统中微生物群落的动态变化,为今后更好地理解其潜在机理和优化处理过程提供理论参考。
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来源期刊
CiteScore
9.60
自引率
10.40%
发文量
107
审稿时长
21 days
期刊介绍: International Biodeterioration and Biodegradation publishes original research papers and reviews on the biological causes of deterioration or degradation.
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