Spatiotemporal successions of shrimp gut microbial colonization: high consistency despite distinct species pool
Spatiotemporal successions of shrimp gut microbial colonization: high consistency despite distinct species pool
复制标题
虾肠道微生物定植的时空连续性：尽管物种库不同，但一致性较高
DOI：
10.1111/1462-2920.14578
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发表时间：
2019-04-01
影响因子：
5.1
通讯作者：
Chen, Jiong
中科院分区：
文献类型：
--
作者：
Xiong, Jinbo;Xuan, Lixia;Chen, Jiong
水生动物在发育过程中会遇到一组新的浮游微生物。虽然寄主已被证明从周围环境中对其肠道微生物区系施加了强烈的选择，但肠道微生物区系和潜在的生态过程受到生物和非生物变异的影响在多大程度上和一般情况下仍不清楚。在这里，通过将肠道和养殖水生细菌群落的时空数据与空间遥远地点对虾生活阶段的环境变量相结合来探索这些问题。对虾肠道微生物群落发生了显著的变化，反映了对虾肠道微生物的发育，对虾生活期肠道细菌特征对分层准确率的贡献率为95.5%。对虾肠道微生物区系的来源很少(2.6%-15.8%)来自饲养水。这种微生物抗性反映在对虾养殖场空间上不同的地点之间的微弱成分差异，这些地点的物种池不同。一直以来，对虾肠道微生物区系的组装不能用饲养水变量和细菌群落来充分解释，而是用与寄主年龄相关的生物特征来解释。对虾肠道微生物区系的演替是由替换(βsim)驱动的，而不是由嵌套性(Beta Nes)驱动的，而浮游细菌群落的演替同样受替换和嵌套性的支配。我们的研究强调了对虾肠道细菌群落组装是如何与它们的发展、饲养种库相耦合的，并且寄主相关群落的演替模式不同于自由生活的细菌。
Aquatic animals encounter suites of novel planktonic microbes during their development. Although hosts have been shown to exert strong selection on their gut microbiota from surrounding environment, to what extent and the generality that the gut microbiota and the underlying ecological processes are affected by biotic and abiotic variations are largely unclear. Here, these concerns were explored by coupling spatiotemporal data on gut and rearing water bacterial communities with environmental variables over shrimp life stages at spatially distant locations. Shrimp gut microbiotas significantly changed mirroring their development, as evidenced by gut bacterial signatures of shrimp life stage contributing 95.5% stratification accuracy. Shrimp sourced little (2.6%-15.8%) of their gut microbiota from their rearing water. This microbial resistance was reflected by weak compositional differences between shrimp farming spatially distinct locations where species pools were distinct. Consistently, the assembly of shrimp gut microbiota was not adequately explained by the rearing water variables and bacterial community, but rather by host-age-associated biotic features. The successions of shrimp gut microbiota were droved by replacement (beta sim), rather than by nestedness (beta nes), while those of bacterioplankton communities were equally governed by replacement and nestedness. Our study highlights how shrimp gut bacterial community assembly is coupled to their development, rearing species pool, and that the successional pattern of host-associated communities is differed from that of free-living bacteria.