Global biogeography of prokaryotes in mangrove sediments: Spatial patterns and ecological insights from 16S rDNA metabarcoding

IF 2.6 3区 地球科学 Q1 MARINE & FRESHWATER BIOLOGY
Emma Jamon-Haon, Philippe Cuny, Alix Rossi, Léa Sylvi, Maud Fiard, Cécile Militon
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Abstract

The global asymmetry in mangrove floristic diversity is well-documented, yet the biogeography of sediment microbial communities remains overlooked. This meta-analysis of 16S rDNA datasets from 12 countries investigates the diversity, composition, and distribution of prokaryotic communities across mangrove bioregions. We found no significant correlation between tree richness and microbial diversity, but identified a microbial hotspot in the Indo-West Pacific. Microbiota associated with different mangroves displayed opposite latitudinal diversity gradients and beta-dispersions. Random forest models highlighted key microbial taxa, while shared OTUs across bioregions suggested a core mangrove microbiota. Importantly, substantial heterogeneity in microbiota composition was strongly influenced by methodological factors such as molecular protocols used in the different studies. While these variations limit direct dataset comparisons, they underscore the urgent need for more consistent and harmonized sampling and sequencing approaches in future research. Despite these challenges, the observed distance-decay relationship supports the role of dispersal barriers in shaping mangrove sediment microbiota. This study provides insights into the potential influence of environmental factors, beyond plant diversity alone, in structuring prokaryotic communities in mangrove sediments. By acknowledging methodological biases and proposing standardized frameworks for future research, we aim to refine our understanding of mangrove microbiome dynamics and their ecological implications.

Abstract Image

红树林沉积物中原核生物的全球生物地理学:来自16S rDNA元条形码的空间格局和生态学见解
红树林植物区系多样性的全球不对称性已被充分证明,但沉积物微生物群落的生物地理学仍然被忽视。本研究对来自12个国家的16S rDNA数据集进行了荟萃分析,调查了红树林生物区原核生物群落的多样性、组成和分布。我们发现树木丰富度与微生物多样性之间没有显著的相关性,但在印度-西太平洋发现了一个微生物热点。与不同红树林相关的微生物群表现出相反的纬向多样性梯度和β -分散。随机森林模型突出了关键的微生物类群,而跨生物区域的共享otu则表明了一个核心的红树林微生物群。重要的是,微生物群组成的实质性异质性受到不同研究中使用的分子协议等方法学因素的强烈影响。虽然这些差异限制了直接的数据集比较,但它们强调了在未来的研究中迫切需要更一致和协调的采样和测序方法。尽管存在这些挑战,观察到的距离-衰减关系支持了扩散屏障在塑造红树林沉积物微生物群中的作用。本研究提供了环境因素对红树林沉积物中原核生物群落结构的潜在影响,而不仅仅是植物多样性。通过承认方法上的偏差,并为未来的研究提出标准化框架,我们的目标是完善我们对红树林微生物群动力学及其生态影响的理解。
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来源期刊
CiteScore
5.60
自引率
7.10%
发文量
374
审稿时长
9 months
期刊介绍: Estuarine, Coastal and Shelf Science is an international multidisciplinary journal devoted to the analysis of saline water phenomena ranging from the outer edge of the continental shelf to the upper limits of the tidal zone. The journal provides a unique forum, unifying the multidisciplinary approaches to the study of the oceanography of estuaries, coastal zones, and continental shelf seas. It features original research papers, review papers and short communications treating such disciplines as zoology, botany, geology, sedimentology, physical oceanography.
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