Spatial distribution of bacterial communities driven by environmental factors in the sediment of Lateolabrax japonicus ponds

• Published in: Aquaculture 2025-02, Vol.596, p.741738, Article 741738
• Main Authors: Xu, Yu-Min, Zhu, Zheng, Luo, Wu-Lang, Huang, Wei, Liang, Jun-Han, Sun, Hong-Yan, Qin, Qi-Wei
• Format: Article
• Language: English
• Subjects: aquaculture; bacteria; bacterial communities; China; community structure; denitrification; Diversity; dominant species; Environmental factors; farmed fish; fish ponds; genes; Lateolabrax japonicus; Nitrobacter; nitrogen content; nitrogen cycle; Nitrosospira; perch; Sediment; sediments; total organic carbon; water quality
• ISSN: 0044-8486
• DOI: 10.1016/j.aquaculture.2024.741738

Dynamic changes of bacterial communities in the sediment are very important for preventing diseases and water quality in aquaculture ponds. In this study, bacterial communities in the sediment of Sea perch Lateolabrax japonicus, an important farmed fish in China, ponds were studied using 16S rRNA Illumina sequencing and functional gene array. At the phylum level, Pseudomonadota, Actinomycetota and Chloroflexota were the dominant species. The bacterial community composition was different in spatial variation. Among the environmental factors, the concentration of nitrogen related factors (TN, NO3−-N NH3-N, NO2−N) and total organic carbon was the main impact on the composition of bacterial community, especially denitrifying bacterial community. Nitrifying and denitrifying bacteria accounted for 4.81 %, and bacteria related to nitrogen cycle accounted for 18.36 %. Higher diversity of bacteria in healthy fish pond than that of the diseased fish pond. In the diseased fish pond, lower abundance of Nitrosospira and higher abundance of Nitrobacter were found, and the contents of NH3-N, NO2−-N and total organic carbon were significantly higher. This study would help to reveal that microbial community structure could reflect the health of cultured animal and surroundings, and it could provide a theoretical reference for the healthy environments in the sediment of Sea perch ponds in South China. •Spatial distribution of Bacterial communities in the sediment of sea bass culture pond were analyzed.•Nitrifying and denitrifying bacteria was explored.•The relationship between environmental factors and bacterial communities was evaluated.