High diversity of crustose coralline algae microbiomes across species and islands, and implications for coral recruits.

IF 6.2 2区 环境科学与生态学 Q1 GENETICS & HEREDITY Environmental Microbiome Pub Date : 2024-12-22 DOI:10.1186/s40793-024-00640-y
Corentin Hochart, Héloïse Rouzé, Béatrice Rivière, Hans-Joachim Ruscheweyh, Laetitia Hédouin, Xavier Pochon, Robert S Steneck, Julie Poulain, Caroline Belser, Maggy M Nugues, Pierre E Galand
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引用次数: 0

Abstract

Background: Crustose Coralline Algae (CCA) play a crucial role in coral reef ecosystems, contributing significantly to reef formation and serving as substrates for coral recruitment. The microbiome associated with CCAs may promote coral recruitment, yet these microbial communities remain largely understudied. This study investigates the microbial communities associated with a large number of different CCA species across six different islands of French Polynesia, and assess their potential influence on the microbiome of coral recruits.

Results: Our findings reveal that CCA harbor a large diversity of bacteria that had not been reported until now. The composition of these microbial communities was influenced by geographic location, and was also closely linked to the host species, identified at a fine taxonomic unit using the 16S rRNA gene of the CCA chloroplast. We demonstrate the usefulness of these ecologically meaningful units that we call CCA chlorotypes. Additionally, we observed a correlation between host phylogeny and microbiome composition (phylosymbiosis) in two CCA species. Contrary to expectations, the CCA microbiome did not act as a microbial reservoir for coral recruits. However, the microbial community of coral recruits varied according to the substrate on which they grew.

Conclusions: The study significantly expands the number of characterized CCA microbiomes, and provides new insight into the extensive diversity of these microbial communities. We show distinct microbiomes between and within CCA species, characterized by specific chloroplast 16S rRNA gene sequences. We term these distinct groups "chlorotypes", and demonstrate their utility to differentiate CCA. We also show that only few bacterial taxa were shared between CCA and coral recruits growing in contact with them. Nevertheless, we observed that the microbial community of coral recruits varied depending on the substrate they grew on. We conclude that CCA and their associated bacteria influence the microbiome composition of the coral recruits.

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跨物种和岛屿的甲壳珊瑚藻类微生物群的高度多样性及其对珊瑚招募的影响。
背景:珊瑚藻(CCA)在珊瑚礁生态系统中起着至关重要的作用,对珊瑚礁的形成有重要贡献,并作为珊瑚补充的基质。与cca相关的微生物群落可能促进珊瑚的招募,但这些微生物群落在很大程度上仍未得到充分研究。本研究调查了法属波利尼西亚六个不同岛屿上与大量不同CCA物种相关的微生物群落,并评估了它们对珊瑚群落微生物群的潜在影响。结果:我们的研究结果表明,CCA中含有大量的细菌,这是迄今为止尚未报道的。这些微生物群落的组成受地理位置的影响,并与宿主物种密切相关,利用CCA叶绿体的16S rRNA基因在一个精细分类单位上鉴定。我们证明了这些有生态意义的单位的有用性,我们称之为CCA氯型。此外,我们还观察到两种CCA物种的宿主系统发育与微生物组组成(系统共生)之间的相关性。与预期相反,CCA微生物组并没有作为珊瑚新成员的微生物储存库。然而,珊瑚的微生物群落根据它们生长的基质而变化。结论:该研究显著扩展了表征CCA微生物组的数量,并为这些微生物群落的广泛多样性提供了新的见解。我们显示不同的微生物组之间和内部的CCA物种,其特征是特定的叶绿体16S rRNA基因序列。我们将这些不同的群体称为“氯型”,并证明了它们在区分CCA方面的效用。我们还表明,CCA和与它们接触生长的珊瑚新生体之间只有少数细菌分类群是共享的。然而,我们观察到珊瑚招募的微生物群落根据它们生长的基质而变化。我们得出结论,CCA及其相关细菌影响珊瑚招募的微生物组组成。
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来源期刊
Environmental Microbiome
Environmental Microbiome Immunology and Microbiology-Microbiology
CiteScore
7.40
自引率
2.50%
发文量
55
审稿时长
13 weeks
期刊介绍: Microorganisms, omnipresent across Earth's diverse environments, play a crucial role in adapting to external changes, influencing Earth's systems and cycles, and contributing significantly to agricultural practices. Through applied microbiology, they offer solutions to various everyday needs. Environmental Microbiome recognizes the universal presence and significance of microorganisms, inviting submissions that explore the diverse facets of environmental and applied microbiological research.
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