Hou Dongwei, Zhou Renjun, Deng Zhixuan, Zeng Shenzheng, Weng Shaoping, He Jianguo, Huang Zhijian
State Key Laboratory of Biocontrol, School of Marine Sciences, Sun Yat-sen University, Guangzhou, 510275 China.
School of Life Sciences, China-ASEAN Belt and Road Joint Laboratory on Mariculture Technology, Sun Yat-sen University, Guangzhou, 510275 China.
Mar Life Sci Technol. 2024 Jun 14;6(4):690-699. doi: 10.1007/s42995-024-00236-y. eCollection 2024 Nov.
Given the importance of the intestinal microbiota in life-long health, increasing attention has been paid to ecological mechanisms that govern microbial succession. Both environmental dispersal and host priority effect play important roles in intestinal microbiota succession of aquatic animals, but their relative importance is unknown. Here, we explore the intestinal microbiota succession and assembly of across larvae, postlarvae, juvenile, and preadult stages. We aimed to clarify the relative contributions between environmental dispersal and host priority effect on intestinal microbiota succession. We found that both α- and β-diversity of the intestinal microbiota changed dynamically along with host development. In particular, the intestinal microbiota assemblies were dominated by stochastic processes, except with the larvae stage. The succession of shrimp intestinal microbiota was clearly influenced by internal communities in the intestines of larvae, as well as the external communities in water and sediment. Importantly, the impact of environmental dispersal on the intestinal microbiota succession outweighed the host priority effect during the larvae and postlarvae stages. However, this situation was largely reversed during the juvenile and preadult stages. The possible reason is that, during the larvae and postlarvae stages, shrimp mainly feed on plankton from the environment, and their digestive system remains underdeveloped, the host recruits numerous microbes from the environment and selects specific microbes to aid digestion and nutrient absorption. These findings enhance our understanding of alternate effects of environmental and host factors on the intestinal microbiota succession of aquatic animals and provide a foundation for developing microecological management strategies in shrimp culture.
The online version contains supplementary material available at 10.1007/s42995-024-00236-y.
鉴于肠道微生物群在终身健康中的重要性，人们越来越关注控制微生物演替的生态机制。环境扩散和宿主优先效应在水生动物肠道微生物群演替中都起着重要作用，但其相对重要性尚不清楚。在这里，我们探讨了虾在幼体、后期幼体、幼虾和成虾前期阶段的肠道微生物群演替和组装。我们旨在阐明环境扩散和宿主优先效应在肠道微生物群演替中的相对贡献。我们发现，肠道微生物群的α多样性和β多样性都随着宿主发育而动态变化。特别是，除了幼体阶段外，肠道微生物群的组装主要由随机过程主导。虾肠道微生物群的演替明显受到幼体肠道内群落以及水和沉积物中外群落的影响。重要的是，在幼体和后期幼体阶段，环境扩散对肠道微生物群演替的影响超过了宿主优先效应。然而，在幼虾和成虾前期阶段，这种情况在很大程度上发生了逆转。可能的原因是，在幼体和后期幼体阶段，虾主要以环境中的浮游生物为食，其消化系统仍未发育完全，宿主从环境中招募大量微生物并选择特定微生物来帮助消化和营养吸收。这些发现增强了我们对环境和宿主因素对水生动物肠道微生物群演替的交替效应的理解，并为虾类养殖中制定微生态管理策略提供了基础。
在线版本包含可在10.1007/s42995-024-00236-y获取的补充材料。
