Microbial communities within the gut can markedly impact host health and fitness. To what extent environmental influences affect the differential distribution of these microbial populations may therefore significantly impact the successful farming of the host. Using a sea-based container culture (SBCC) system for the on-growing of European lobster (Homarus gammarus), we tracked the bacterial gut microbiota over a 1-year period. We compared these communities with lobsters of the same cohort, retained in a land-based culture (LBC) system to assess the effects of the culture environment on gut bacterial assemblage and describe the phylogenetic structure of the microbiota to compare deterministic and stochastic assembly across both environments. Bacterial gut communities from SBCCs were generally more phylogenetically clustered, and therefore deterministically assembled, compared to those reared in land-based systems. Lobsters in SBCCs displayed significantly more species-rich and species-diverse gut microbiota compared to those retained in LBC. A reduction in the bacterial diversity of the gut was also associated with higher infection prevalence of the enteric viral pathogen Homarus gammarus nudivirus (HgNV). SBCCs may therefore benefit the overall health of the host by promoting the assembly of a more diverse gut bacterial community and reducing the susceptibility to disease.

中文翻译：

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空间和时间轴影响幼年欧洲龙虾（Homarus gammarus）肠道微生物组的生态学。

肠道内的微生物群落可以显着影响宿主的健康和健康。因此，环境影响在多大程度上影响这些微生物种群的差异分布可能会显着影响宿主的成功养殖。我们使用海基容器培养 (SBCC) 系统培养欧洲龙虾 (Homarus gammarus)，跟踪了 1 年期间的细菌肠道微生物群。我们将这些群落与同一队列的龙虾进行比较，保留在陆基培养 (LBC) 系统中，以评估培养环境对肠道细菌组合的影响，并描述微生物群的系统发育结构，以比较两者的确定性和随机性组装环境。来自 SBCC 的细菌肠道群落通常在系统发育上更加聚集，因此，与在陆基系统中饲养的那些相比，它们是确定性组装的。与 LBC 中保留的龙虾相比，SBCC 中的龙虾显示出更多物种丰富和物种多样化的肠道微生物群。肠道细菌多样性的减少也与肠道病毒病原体 Homarus gammarus nudivirus (HgNV) 的较高感染率有关。因此，SBCC 可能通过促进更多样化的肠道细菌群落的组装和降低对疾病的易感性来有益于宿主的整体健康。肠道细菌多样性的减少也与肠道病毒病原体 Homarus gammarus nudivirus (HgNV) 的较高感染率有关。因此，SBCC 可能通过促进更多样化的肠道细菌群落的组装和降低对疾病的易感性来有益于宿主的整体健康。肠道细菌多样性的减少也与肠道病毒病原体 Homarus gammarus nudivirus (HgNV) 的较高感染率有关。因此，SBCC 可能通过促进更多样化的肠道细菌群落的组装和降低对疾病的易感性来有益于宿主的整体健康。