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<p>Mangrove sediments harbor a significant number and variety of microorganisms, which are crucial for plant growth and the establishment of community structure. Mudflat sediments serve as a proxy for the bacterial community present in the proximity of mangrove forests, establishing a reference framework for understanding the diversity of bacterial populations within mangrove ecosystems. To assess the susceptibility of bacterial communities and discern the disparities in microbial flora between natural and replanted mangrove forests, this study examined the diversity and composition of sediment bacterial communities from a mudflat, a native mangrove forest, and a nearby planted mangrove forest in Quanzhou Bay, China. In total, 65 bacterial phyla and 231 bacterial genera were detected across the three distinct types of mangrove wetlands. Proteobacteria, the predominant phylum, comprised roughly 50% of the total identified bacterial population. The diversity indices indicated that the sediment within the natural mangrove forest exhibited the highest bacterial α-diversity, whereas the mudflat displayed the lowest. UniFrac-based analysis demonstrated a closer relationship between the bacterial community in natural and replanted mangroves, as opposed to mudflats. The sediment samples were categorized into two primary clusters: one encompassing mudflat and the other comprising natural and replanted mangroves. The redundancy analysis demonstrated that the assembly and composition of bacterial communities in various samples were primarily influenced by total nitrogen and organic matter, two key soil environmental factors. This study provides a baseline for monitoring bacterial community structure and dynamics with changes in plant cover and environmental conditions in the mangrove.</p>

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Comparison of Soil Bacterial Communities between Replanted and Natural Mangrove Forests in Quanzhou Bay Wetland of China

  • 期刊论文

  • 发表日期：

    2025年6月13日

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  • Cailin Luo,
  • Ruohai Chen,
  • Yangmin Wen

摘要

Mangrove sediments harbor a significant number and variety of microorganisms, which are crucial for plant growth and the establishment of community structure. Mudflat sediments serve as a proxy for the bacterial community present in the proximity of mangrove forests, establishing a reference framework for understanding the diversity of bacterial populations within mangrove ecosystems. To assess the susceptibility of bacterial communities and discern the disparities in microbial flora between natural and replanted mangrove forests, this study examined the diversity and composition of sediment bacterial communities from a mudflat, a native mangrove forest, and a nearby planted mangrove forest in Quanzhou Bay, China. In total, 65 bacterial phyla and 231 bacterial genera were detected across the three distinct types of mangrove wetlands. Proteobacteria, the predominant phylum, comprised roughly 50% of the total identified bacterial population. The diversity indices indicated that the sediment within the natural mangrove forest exhibited the highest bacterial α-diversity, whereas the mudflat displayed the lowest. UniFrac-based analysis demonstrated a closer relationship between the bacterial community in natural and replanted mangroves, as opposed to mudflats. The sediment samples were categorized into two primary clusters: one encompassing mudflat and the other comprising natural and replanted mangroves. The redundancy analysis demonstrated that the assembly and composition of bacterial communities in various samples were primarily influenced by total nitrogen and organic matter, two key soil environmental factors. This study provides a baseline for monitoring bacterial community structure and dynamics with changes in plant cover and environmental conditions in the mangrove.