The marine fish farming industry is growing at a significant rate, yet a number of concerns still remain with regards to environmental impacts on the surrounding coastal sea and its biota. Here, we assessed the impact of intensive farming on benthic prokaryotic communities at a Mediterranean sea bass and sea bream intensive aquaculture site over a period of 10 months, in relation to the increase in fish biomass within the cage together with the organic matter enrichment in the sediments. We report positive relationships between prokaryotic abundance and both organic matter and fish biomass, and a contextual decrease in prokaryotic diversity below the cages. A significant shift in microbial community composition occurred in fish farm sediments (FF) over time, indicating a likely impact of ongoing aquaculture activity on prokaryotic communities. Among the dominant taxa at the impacted site, we found Epsilonproteobacteria and Bacteroidetes, which showed a general increase with fish biomass. Analyses on specialist taxa underlined significant contributions of Clostridiales and Bacteroidales in the farmed sediments. Finally, sea bream and sea bass gut microbiome-related taxa were detected during the sampling period. Our results indicate that prokaryotic community composition underneath the cages is related to fish biomass and organic enrichment over the course of production, and confirms that the study of benthic microbial communities at aquaculture sites represents a useful tool to assess the impact of intensive mariculture on the surrounding environment.

中文翻译：

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养鱼场沉积物下微生物群落的时间变化与生产周期中的有机富集和鱼类生物量有关

海水鱼类养殖业正在以显着的速度增长，但对周围沿海海域及其生物群的环境影响仍然存在许多担忧。在这里，我们评估了 10 个月内集约化养殖对地中海鲈鱼和鲷鱼集约化养殖场的底栖原核生物群落的影响，这与网箱内鱼类生物量的增加以及池中有机物的富集有关。沉积物。我们报告了原核生物丰度与有机物质和鱼类生物量之间的正相关关系，以及网箱下方原核生物多样性的减少。随着时间的推移，养​​鱼场沉积物 (FF) 中微生物群落组成发生了显着变化，表明正在进行的水产养殖活动可能对原核生物群落产生影响。在受影响地点的主要分类群中，我们发现了 Epsilonproteobacteria 和 Bacteroidetes，它们随着鱼类生物量的增加而普遍增加。对专业分类群的分析强调了梭菌目和拟杆菌目在养殖沉积物中的重要贡献。最后，在采样期间检测到鲷鱼和鲈鱼肠道微生物组相关的分类群。我们的结果表明，网箱下方的原核生物群落组成与生产过程中的鱼类生物量和有机富集有关，并证实水产养殖场底栖微生物群落的研究是评估集约化海水养殖对周围环境影响的有用工具。环境。这表明鱼类生物量普遍增加。对专业分类群的分析强调了梭菌目和拟杆菌目在养殖沉积物中的重要贡献。最后，在采样期间检测到鲷鱼和鲈鱼肠道微生物组相关的分类群。我们的结果表明，网箱下方的原核生物群落组成与生产过程中的鱼类生物量和有机富集有关，并证实水产养殖场底栖微生物群落的研究是评估集约化海水养殖对周围环境影响的有用工具。环境。这表明鱼类生物量普遍增加。对专业分类群的分析强调了梭菌目和拟杆菌目在养殖沉积物中的重要贡献。最后，在采样期间检测到鲷鱼和鲈鱼肠道微生物组相关的分类群。我们的结果表明，网箱下方的原核生物群落组成与生产过程中的鱼类生物量和有机富集有关，并证实水产养殖场底栖微生物群落的研究是评估集约化海水养殖对周围环境影响的有用工具。环境。