Larvae of Deep-Sea Invertebrates Harbor Low-Diversity Bacterial Communities
Larvae of Deep-Sea Invertebrates Harbor Low-Diversity Bacterial Communities
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DOI：
10.1086/715669
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发表时间：
2021-08
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影响因子：
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通讯作者：
Tyler J. Carrier;S. Beaulieu;S. Mills;L. Mullineaux;A. Reitzel
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文献类型：
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作者：
Tyler J. Carrier;S. Beaulieu;S. Mills;L. Mullineaux;A. Reitzel
微生物共生体是海洋无脊椎动物及其发育阶段的常见生活历史。沿海海洋无脊椎动物的卵，胚胎和幼虫相关的细菌群落倾向于特定物种，并且与宿主生物学和生态学方面相关。与沿海海洋无脊椎动物的发育阶段相关的细菌涵盖了四个数量级，从单个共同主义者到数千个独特的分类单元。这种理解主要源于沿海物种的发展阶段。如果它们是海洋无脊椎动物的广泛代表，那么我们可能会期望深海物种与多样性相似的细菌群落相关。为了进行测试，我们使用了Amplicon测序来介绍来自多个分类群的无脊椎动物幼虫的细菌群落（Annelids，Annelids，Molluscs，甲壳类动物），从2500到3670 m的深度到3670 m，靠近底部的水域附近的底部底部水域（Pacific Pacific Ocess）的Pacific anderaa and the Pacific assina and the Pacific and back and the Marad and the Marad and the the Marad and the the the pacific and the the pacific and back and pack and the the pacific and。我们发现，深海无脊椎动物的幼虫与低多样性细菌群落（〜30个细菌分类群）相关，这些群体缺乏分类群体之间缺乏特殊性。这些社区的多样性估计比沿海无脊椎动物幼虫低约7.9倍，但该结果取决于分类群。与低多样性社区相关联可能意味着深海无脊椎动物幼虫对微生物组没有很大的依赖，并且假设缺乏共生贡献与对沿海海洋无脊椎动物幼虫的期望会有所不同。
Microbial symbionts are a common life-history character of marine invertebrates and their developmental stages. Communities of bacteria that associate with the eggs, embryos, and larvae of coastal marine invertebrates tend to be species specific and correlate with aspects of host biology and ecology. The richness of bacteria associated with the developmental stages of coastal marine invertebrates spans four orders of magnitude, from single mutualists to thousands of unique taxa. This understanding stems predominately from the developmental stages of coastal species. If they are broadly representative of marine invertebrates, then we may expect deep-sea species to associate with bacterial communities that are similar in diversity. To test this, we used amplicon sequencing to profile the bacterial communities of invertebrate larvae from multiple taxonomic groups (annelids, molluscs, crustaceans) collected from 2500 to 3670 m in depth in near-bottom waters near hydrothermal vents in 3 different regions of the Pacific Ocean (the East Pacific Rise, the Mariana Back-Arc, and the Pescadero Basin). We find that larvae of deep-sea invertebrates associate with low-diversity bacterial communities (~30 bacterial taxa) that lack specificity between taxonomic groups. The diversity of these communities is estimated to be ~7.9 times lower than that of coastal invertebrate larvae, but this result depends on the taxonomic group. Associating with a low-diversity community may imply that deep-sea invertebrate larvae do not have a strong reliance on a microbiome and that the hypothesized lack of symbiotic contributions would differ from expectations for larvae of coastal marine invertebrates.