Alterations in bacterial structure and function in seawater due to Mytilus coruscus farming: implications for sustainable aquaculture management

• DOI: 10.3389/fmicb.2025.1567340
• Publication Date: 2025-04-04T01:14:06Z
• Authors: Fenglin Wang; Lijia Gao; Kobi Talma; Yufeng Pan; Qi Liu; Yaodong He; Zhengwei Peng; Xiumei Zhang

Microorganisms are essential for maintaining the ecological balance and supporting health of aquatic animals in aquaculture environments. This study utilized high-throughput sequencing technology to analyze diversity, composition, co-occurrence networks, assembly mechanisms, functional predictions bacterial communities seawater from both Mytilus coruscus areas (AA) non-aquaculture (NAA) across different seasons. The results indicated that number operational taxonomic units (OTUs) AA group was higher than NAA group, while Simpson index significantly lower bottom water (p < 0.05). Additionally, β-diversity (Bray-Curtis distance βMNTD) reduced compared M. farming influenced relative abundance certain genera, including Pseudoalteromonas, HIMB11, Clade Ia, with exhibiting a greater specialist species. Co-occurrence network analysis revealed had nodes, edges, modularity, whereas displayed closeness centrality betweenness centrality. Following removal 80% natural connectivity surface declined more rapidly group. Homogeneous selection primary mechanism diffusion limitation predominant FAPROTAX functions associated organic matter degradation nitrogen cycling These findings suggest activities alter structure function seawater, providing valuable data support sustainable optimize fisheries' carbon sink management strategies.