Microbiome divergence of marine gastropod species separated by the Isthmus of Panama.

IF 3.9 2区 生物学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Applied and Environmental Microbiology Pub Date : 2024-10-31 DOI:10.1128/aem.01003-24
Alexander T Neu, Mark E Torchin, Eric E Allen, Kaustuv Roy
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Abstract

The rise of the Isthmus of Panama separated the populations of many marine organisms, which then diverged into new geminate sister species currently living in the Eastern Pacific Ocean and the Caribbean Sea. However, we know very little about how such evolutionary divergences of host species have shaped the compositions of their microbiomes. Here, we compared the microbiomes of whole-body and shell-surface samples of geminate species of marine gastropods in the genera Cerithium and Cerithideopsis to those of congeneric outgroups. Our results suggest that the effects of ~3 million years of separation and isolation on microbiome composition varied among host genera and between sample types within the same hosts. In the whole-body samples, microbiome compositions of geminate species pairs tended to be similar, likely due to host filtering, although the strength of this relationship varied among the two groups and across similarity metrics. Shell-surface microbiomes show contrasting patterns, with co-divergence between the host taxa and a small number of microbial clades evident in Cerithideopsis but not Cerithium. These results suggest that (i) isolation of host populations after the rise of the Isthmus of Panama affected microbiomes of geminate hosts in a complex and host-specific manner, and (ii) host-associated microbial taxa respond differently to vicariance events than the hosts themselves.IMPORTANCEWhile considerable work has been done on evolutionary divergences of marine species in response to the rise of the Isthmus of Panama, which separated two previously connected oceans, how this event shaped the microbiomes of these marine hosts remains poorly known. Using whole-body and shell-surface microbiomes of closely related gastropod species from opposite sides of the Isthmus, we show that divergences of microbial taxa after the formation of the Isthmus are often not concordant with those of their gastropod hosts. Our results show that evolutionary responses of marine gastropod-associated microbiomes to major environmental perturbations are complex and are shaped more by local environments than host evolutionary history.

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被巴拿马地峡分隔的海洋腹足类物种的微生物组分化。
巴拿马地峡的兴起分离了许多海洋生物种群,这些生物随后分化成新的姐妹物种,目前生活在东太平洋和加勒比海。然而,我们对宿主物种的这种进化分化如何影响其微生物组的组成知之甚少。在这里,我们比较了Cerithium属和Cerithideopsis属海洋腹足类宝石种全身和贝壳表面样本的微生物组与同属外群的微生物组。我们的研究结果表明,约 300 万年的分离和隔离对微生物组组成的影响在宿主属之间和同一宿主的不同样本类型之间各不相同。在全身样本中,同源物种对的微生物组组成趋于相似,这可能是由于宿主的过滤作用,尽管这种关系的强度在两组之间和不同相似度指标之间存在差异。贝壳表面微生物组显示出截然不同的模式,宿主类群和少量微生物支系之间的共同分化在 Cerithideopsis 中很明显,但在 Cerithium 中并不明显。这些结果表明:(i) 巴拿马地峡崛起后宿主种群的隔离以一种复杂和宿主特异的方式影响了雌雄同体宿主的微生物组;(ii) 宿主相关的微生物类群对沧海桑田事件的反应与宿主本身不同。我们利用地峡两侧亲缘关系密切的腹足纲物种的全身和贝壳表面微生物组表明,地峡形成后微生物类群的分化往往与其腹足纲宿主的分化不一致。我们的研究结果表明,海洋腹足动物相关微生物群对重大环境扰动的进化反应是复杂的,更多是由当地环境而不是宿主进化史决定的。
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来源期刊
Applied and Environmental Microbiology
Applied and Environmental Microbiology 生物-生物工程与应用微生物
CiteScore
7.70
自引率
2.30%
发文量
730
审稿时长
1.9 months
期刊介绍: Applied and Environmental Microbiology (AEM) publishes papers that make significant contributions to (a) applied microbiology, including biotechnology, protein engineering, bioremediation, and food microbiology, (b) microbial ecology, including environmental, organismic, and genomic microbiology, and (c) interdisciplinary microbiology, including invertebrate microbiology, plant microbiology, aquatic microbiology, and geomicrobiology.
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