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热带海洋学报

• • 上一篇    

浙江西门岛红树林细菌群落季节性特征及环境驱动因素

蒋守殿1, 胡鑫2, 蓝珮心1, 姚李勤1, 水柏年1, 纪建达3, 何茂求1   

  1. 1. 浙江海洋大学 水产学院, 浙江 舟山 316022

    2. 广东省海洋发展规划研究中心, 广东 广州 510220

    3. 自然资源部第三海洋研究所, 厦门 福建 361000


  • 收稿日期:2025-07-11 修回日期:2025-09-08 接受日期:2025-09-15
  • 通讯作者: 何茂求
  • 基金资助:

    龙港市河口红树林生态系统监测项目, 自然资源部2024年度部省合作项目(2024ZRBSHZ103), 崂山实验室科技创新项目(LSKJ202202905)

Seasonal distribution characteristics and environmental driving factors of bacterial communities in mangrove sediments of Ximen Island, Zhejiang Province

JIANG Shoudian1, HU Xin2, LAN Peixin1, YAO Liqin1, SHUI Bonian1, JI Jianda3, HE Maoqiu1   

  1. 1 Zhejiang Ocean University, Fisheries College, Zhoushan 316022, China

    2. Guangdong Center for Marine Development Research, Guangzhou 510220, China

    3. Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361000, China
  • Received:2025-07-11 Revised:2025-09-08 Accepted:2025-09-15
  • Supported by:
    Monitoring Project of the Mangrove Ecosystem at the Estuary of Longgang; Science and Technology Projects of Guangdong Provincial Department of Natural Resources(2024ZRBSHZ103); Lao Shan Laboratory's Scientific and Technological Innovation Project(LSKJ202202905)

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摘要： 红树林位于热带、亚热带地区海洋与陆地的交汇处, 其高生产力环境孕育了丰富的微生物群落, 在维持红树林生态功能与驱动元素循环等过程中发挥关键性作用。本研究以浙江省西门岛红树林生态系统为研究对象, 采用高通量测序技术对表层沉积物细菌群落进行了系统分析, 探究细菌多样性的季节特征及其与环境参数的关联性。研究结果表明, 西门岛红树林沉积物细菌群落组成中, 变形菌门(Proteobacteria, 39.11%)、脱硫杆菌门(Desulfobacterota, 10.02%)、拟杆菌门(Bacteroidota, 9.17%)等共同构成优势菌群。细菌群落的多样性指数呈现显著的季节性动态变化: Richness指数在冬季达到峰值(2136±235), 而Shannon指数显示春季(8.736±0.213)显著低于秋冬两季(P＜0.05)。β多样性结果表明春季、秋季和冬季样品的细菌群落组成差异显著，呈现出明显的季节特异性。此外，温度和总碳是驱动细菌群落季节性变化的关键环境因子。本研究系统阐明了西门岛红树林微生物群落的季节演替规律, 不仅加强了对亚热带北缘红树林生态系统的理解, 同时也为浙江省红树林生态修复工程的成效评估和可持续发展策略提供了数据支撑。

关键词: 红树林, 沉积物, 细菌多样性, 西门岛

Abstract: Mangrove forests, located at the interface of marine and terrestrial ecosystems in tropical and subtropical regions, harbor highly productive environments that support diverse microbial communities. These communities play a pivotal role in sustaining mangrove ecological functions and driving biogeochemical cycles. This study investigated the Ximen Island mangrove ecosystem in Zhejiang Province, employing high-throughput sequencing to systematically analyze the bacterial communities in surface sediments. We explored seasonal variations in bacterial diversity and assessed their correlations with environmental parameters. Results revealed that the sediment bacterial community in Ximen Island mangroves was dominated by Proteobacteria (39.11%), Desulfobacterota (10.02%), and Bacteroidota (9.17%). Bacterial diversity exhibited significant seasonal dynamics: Richness index peaked in winter (2136±235), while the Shannon index in spring (8.736±0.213) was significantly lower than in autumn and winter (P＜0.05). Principal component analysis (PCA) and Linear discriminant analysis effect size analyses (LefSe) results demonstrated seasonal specificity in bacterial community composition across spring, autumn and winter. Temperature and total carbon content were identified as key environmental drivers of these variations. By elucidating the seasonal succession patterns in microbial communities at Ximen Island, this study enhances the fundamental understanding of subtropical mangrove ecosystems at their northern distributional limit. Furthermore, it provides critical data for evaluating mangrove wetland restoration efficiency in Zhejiang Province and informs future conservation strategies.

Key words: Mangrove, Sediment, Bacterial diversity, Ximen Island