| 海南红树林沉积中硫酸盐还原菌群落的特征 |
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| 引用本文： | 刘文娟,陈新,李建聪,李思萍,陈英洁,唐敏.海南红树林沉积中硫酸盐还原菌群落的特征[J].热带生物学报,2023,14(1):120-128. |
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| 作者姓名： | 刘文娟 陈新 李建聪 李思萍 陈英洁 唐敏 |
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| 作者单位： | 1.海南大学 化学工程与技术学院，海口 570228 |
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| 基金项目： | 海南省自然科学基金高层次人才项目(2019RC039)；国家自然科学基金项目(32160270，31660128)；海南省高等学校科学研究项目(Hnky2019-2)。 |
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| 摘 要： | 在海南北部的红树林及其附近光滩区域，通过高通量测序技术研究了原位沉积中硫酸盐还原菌（SRB）群落结构的季节差异，检测了重金属铜和锌的赋存形态，并分析了相关生态环境因子对SRB群落的影响。结果显示，红树林沉积中SRB的多样性在旱季显著高于雨季，旱季光滩中SRB的多样性最高；在科的水平上，红树林沉积中索利氏菌科（Solibacteraceae）的相对丰度在旱季和雨季都为最大，但SRB群落组成结构在旱季和雨季显著不同；在光滩沉积中，在旱季相对丰度最大的是索利氏菌科，而雨季则为脱硫球茎菌科（Desulfobulbaceae）。相关性分析表明，沉积中的总氮、总磷、pH和特定赋存形态的铜和锌与SRB群落结构的季节性差异显著相关。本研究结果有助于阐明红树林沉积中SRB群落结构特征的季节性差异及其影响机制，为利用红树林进行重金属生态修复提供参考。
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| 关 键 词： | 红树林 硫酸盐还原菌 群落结构 重金属 |
| 收稿时间： | 2022-02-15 |
Community characteristics of sulfate-reducing bacteria in mangrove sediments in Hainan |
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| Affiliation: | 1.College of Chemical, Engineering and Technology, Hainan University, Haikou, Hainan 5702282.College of Ecology and Environment, Hainan University, Haikou, Hainan 5702283.College of Science, Hainan University, Haikou, Hainan 570228, China |
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| Abstract: | Sediments in the mangrove stands and the adjacent low-tide mudflat in the northern Hainan Island were collected, and the physio-chemical properties were determined. The seasonal variation characteristics of the community structures of sulfate-reducing bacteria (SRB) of the in-situ sediments were analyzed by using high-throughput sequencing. The speciation of heavy metal copper and zinc in the sediments were examined and the effects of relevant eco-environmental factors on the SRB communities were analyzed. The results showed that the diversity of SRB in the mangrove sediments was significantly higher in dry season than in rainy season, and the highest in the low-tide adjacent mudflat sediments in dry season. In the family level the SRB community structure in the mangrove sediments was significantly different between dry and rainy seasons, though the relative abundance of Solibacteraceae was consistently the greatest family in both dry and rainy seasons. In the low-tide adjacent mudflat sediments Solibacteraceae was the highest in relative abundance in dry season, while Desulfobulbaceae the highest in rainy season. Correlation analysis showed that the seasonal changes of SRB community structure were significantly correlated with the total nitrogen, total phosphorus, pH and the speciation of copper and zinc in the sediments. The results preliminarily illustrated the seasonal variation of SRB community structure and the related eco-environmental factors in mangrove sediments, and might provide theoretical reference for the ecological restoration of heavy metals by mangroves． |
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