Fungi promote cross-domain interactions even in deep anoxic mangrove sediments.

IF 5.4 2区 环境科学与生态学 Q1 GENETICS & HEREDITY
Ming Sheng Ng, Nathaniel Soon, Min Yi Chin, Sze Koy Ho, Lynn Drescher, Mohamad Azlin Bin Sani, Kiah Eng Lim, Benjamin J Wainwright, Ying Chang
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Abstract

Background: Microbial communities in mangrove sediments play vital ecological roles that underpin the functioning of the overall mangrove ecosystem. Fungal communities, in particular, are known to play crucial roles across sediment systems, yet their roles in mangrove sediments, especially in deeper layers, remain poorly understood without a comprehensive inter-domain characterization. To better understand fungal roles in sediment horizons, 10 sediment cores extending down to a depth of 1 m were taken in three mangrove sites to characterise the archaeal, bacterial, and fungal communities at 10 cm depth intervals.

Results: We demonstrate that sediment depth has distinct effects on the three microbial communities. While fungal community compositions were similar across sediment depths, bacterial and archaeal community compositions were stratified into three distinct layers, surface (10-30 cm), subsurface (40-60 cm), and deep (70-100 cm). Co-occurrence networks were then constructed to investigate the roles of fungi in these sediment layers, where fungi were consistently identified as keystone taxa in maintaining the microbial network topology, with co-domain interactions constituting more than half of all interactions. Even in the deepest layer, fungal nodes still retained high betweenness centralities, acting as network hubs to potentially augment microbial interactions vital for the functioning of the overall ecosystem.

Conclusions: Overall, our results emphasise the important role of fungi in mediating microbial interactions across sediment depths even in deep, anoxic sediment layers, and highlight the importance of cross-domain interactions as integral to a more holistic understanding of the mangrove microbiome.

真菌促进跨域相互作用,甚至在深缺氧红树林沉积物。
背景:红树林沉积物中的微生物群落对整个红树林生态系统的功能起着至关重要的生态作用。众所周知,真菌群落在沉积物系统中起着至关重要的作用,但它们在红树林沉积物中的作用,特别是在更深的层中,如果没有全面的域间表征,人们对它们的作用仍然知之甚少。为了更好地了解真菌在沉积物层中的作用,在三个红树林遗址中取了10个沉积物岩心,延伸至1米的深度,以表征10厘米深度的古细菌、细菌和真菌群落。结果:沉积物深度对三种微生物群落有不同的影响。虽然真菌群落组成在沉积物深度上相似,但细菌和古细菌群落组成分为三个不同的层,表层(10-30 cm),地下(40-60 cm)和深层(70-100 cm)。然后构建共生网络来研究真菌在这些沉积物层中的作用,真菌一直被认为是维持微生物网络拓扑结构的关键分类群,共域相互作用占所有相互作用的一半以上。即使在最深层,真菌节点仍然保持着高度的中间性中心性,作为网络枢纽,潜在地增强了对整个生态系统功能至关重要的微生物相互作用。结论:总体而言,我们的研究结果强调了真菌在跨沉积物深度甚至在深层缺氧沉积层中介导微生物相互作用的重要作用,并强调了跨域相互作用对于更全面地了解红树林微生物组不可或缺的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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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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