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Diet-induced shifts in the crown-of-thorns (Acanthaster sp.) larval microbiome

机译：饮食引起的荆棘（Acanthaster sp。）幼虫微生物组的转变

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Predation by the crown-of-thorns seastar (CoTS; Acanthaster sp.) is a pervasive stressor attributing to the decline of coral reefs. These outbreaks are suggested to be linked to eutrophy-driven recruitment pulses, where increased nutrients enhance larval success. CoTS larvae, however, are tolerant of oligotrophic conditions typical of tropical ecosystems and outbreaks occur in regions isolated from eutrophy, highlighting the resilience of these larvae to oligotrophic conditions. Here, we test the hypothesis that CoTS larvae associate with bacterial communities that are dynamic across an oligotrophic-eutrophic continuum and are specific to each feeding regime. Our analysis of the CoTS larval microbiome suggests that CoTS larvae associate with a bacterial community distinct from the environmental microbiota and that this community experiences a community-level shift in response to differential feeding that is maintained over development. Symbioses with a diverse and dynamic, and a potentially phototrophic, bacterial community may contribute to resilience of CoTS larvae that enable the success of CoTS and, perhaps, other tropical marine larvae in oligotrophic seas.
机译：荆棘冠海星（CoTS； Acanthaster sp。）的捕食是一种普遍的压力源，归因于珊瑚礁的衰退。建议将这些暴发与富营养化的募集脉冲联系起来，其中增加的营养素可以提高幼虫的成功率。然而，COTS幼虫可以忍受热带生态系统特有的贫营养条件，而暴发发生在与富营养质隔离的区域，突出了这些幼虫对贫营养条件的适应力。在这里，我们测试了CoTS幼虫与细菌群落相关联的假说，该细菌群落在贫营养-富营养化连续体中是动态的，并且对每种喂养方式都是特定的。我们对CoTS幼虫微生物组的分析表明，CoTS幼虫与不同于环境微生物群的细菌群落相关联，并且该群落经历了群落水平的转变，以响应发育过程中维持的差异饲养。具有多样且动态的，潜在的光养细菌群落的共生体可能有助于CoTS幼虫的复原力，从而使CoTS以及其他热带海洋幼虫在贫营养海域获得成功。

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