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首页> 外文期刊>Marine biology >Shift in bacterial taxa precedes morphological plasticity in a larval echinoid
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Shift in bacterial taxa precedes morphological plasticity in a larval echinoid

机译：幼虫类棘突中细菌类群的变化先于形态可塑性

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摘要

Morphological plasticity is an adaptive response to heterogenous environments when a fitness advantage is conferred. Larval sea urchins, for example, are hypothesized to increase individual fitness in dilute feeding environments by elongating their feeding structure relative to their body size. Morphological plasticity for larval sea urchins is also coupled with significant shifts in the associated bacterial community, but whether this change to the associated microbiota occurs before, during, or following the expression of morphological plasticity is unclear. Using the sea urchin Lytechinus variegatus, we compare the temporal pattern of the microbial community and how it relates to the timing of morphological plasticity for larvae cultured in different food concentrations. From prefeeding through the expression of morphological plasticity, we observed that the microbiota associated with L. variegatus larvae exhibit a four-stage successional pattern, where changes in this community shift prior to the expression of the environment-specific morphology. The high food treatment, which results in the short-arm phenotype, deviated from the microbial trajectory of larval siblings prior to measurable morphological plasticity. These data suggest that a holobiont may exhibit shifts in the associated bacterial community corresponding with variation in the feeding environment that could occur in anticipation of or prior to morphological plasticity.
机译：当赋予适应性优势时，形态可塑性是对异质环境的适应性反应。例如，据推测，幼虫海胆可通过延长其进食结构相对于它们的体型来增加其在稀饲料环境中的适应性。幼体海胆的形态可塑性还与相关细菌群落的显着变化有关，但是对相关微生物群的这种变化是否发生在形态可塑性表达之前，之中或之后尚不清楚。使用海胆Lytechinus variegatus，我们比较了不同食物浓度下培养的幼虫的微生物群落的时间模式及其与形态可塑性时间的关系。从预进食到形态可塑性的表达，我们观察到与变异乳杆菌幼虫相关的微生物群表现出四个阶段的连续模式，其中该群落的变化先于环境特异性形态的表达。高食物处理会导致短臂表型，在可测量的形态可塑性之前会偏离幼虫兄弟姐妹的微生物轨迹。这些数据表明，全盐菌可能在相关的细菌群落中发生移动，这与在预期或在形态可塑性之前可能发生的进食环境变化相对应。

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  • 来源
    《Marine biology》 |2019年第12期|164.1-164.10|共10页
  • 作者

    Carrier Tyler J.; Reitzel Adam M.;

  • 作者单位

    Univ N Carolina Dept Biol Sci Charlotte NC 28223 USA;

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