PDF(Pubmed)
Abstract：
The gut microbiota of fish is crucial for their growth, development, nutrient uptake, physiological balance, and disease resistance. Yet our knowledge of these microbial communities in wild fish populations in their natural ecosystems is insufficient. This study systematically examined the gut microbial communities of seven wild fish species in Chaohu Lake, a fishing-restricted area with minimal water turnover, across four seasons. We found significant variations in gut microbial community structures among species. Additionally, we observed significant seasonal and regional variations in the gut microbial communities. The Chaohu Lake fish gut microbial communities were predominantly composed of the phyla Firmicutes, Proteobacteria(Gamma), Proteobacteria(Alpha), Actinobacteriota, and Cyanobacteria. At the genus level, Aeromonas, Cetobacterium, Clostridium sensu stricto 1, Romboutsia, and Pseudomonas emerged as the most prevalent. A co-occurrence network analysis revealed that C. auratus, C. carpio, and C. brachygnathus possessed more complex and robust gut microbial networks than H. molitrix, C. alburnus, C. ectenes taihuensis, and A. nobilis. Certain microbial groups, such as Clostridium sensu stricto 1, Romboutsia, and Pseudomonas, were both dominant and keystone in the fish gut microbial network. Our study offers a new approach for studying the wild fish gut microbiota in natural, controlled environments. It offers an in-depth understanding of gut microbial communities in wild fish living in stable, limited water exchange natural environments.
摘要：
鱼的肠道菌群对它们的生长至关重要，发展,营养吸收，生理平衡,和抗病性。然而，我们对自然生态系统中野生鱼类种群中这些微生物群落的了解还不够。本研究系统地研究了巢湖7种野生鱼类的肠道微生物群落，限制捕鱼的区域，水流量最小，跨越四个季节。我们发现物种之间的肠道微生物群落结构存在显着差异。此外,我们观察到肠道微生物群落的显著季节性和区域性变化.巢湖鱼肠微生物群落主要由厚壁门组成，变形杆菌(Gamma),变形杆菌(Alpha),放线菌,和蓝细菌。在属一级，气单胞菌,细菌杆菌,敏感梭菌1，Romboutsia，假单胞菌是最普遍的。共现网络分析显示，C.auratus，C.Carpio,短鼻梭菌比H.melitrix拥有更复杂和更强大的肠道微生物网络，C.Alburnus,C.太湖ectenes，还有A.Nobilis.某些微生物群,如敏感梭菌1，Romboutsia，和假单胞菌,在鱼肠微生物网络中既是显性的又是关键的。我们的研究提供了一种新的方法来研究自然的野生鱼肠道微生物群，受控环境。它提供了对稳定生活的野生鱼类肠道微生物群落的深入了解，有限的水交换自然环境。
