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Diversity and Composition of Soil Microbes Associated with Barringtonia racemosa Communities

文献类型： 外文期刊

作者： Lin, Yutong 1 ; Tan, Xiaohui 3 ; Hu, Ju 5 ; Yu, Yanping 3 ; Yang, Xiuling 5 ; Li, Lin 5 ; Tan, Yanfang 5 ; Dong, Zeting 5 ; Wei, Yilan 5 ; Liang, Fang 5 ;

作者机构： 1.Yulin Normal Univ, Coll Biol & Pharm, Yulin 537000, Peoples R China

2.Yulin Normal Univ, Educ Dept Guangxi Zhuang Autonomous Reg, Key Lab Mt Biodivers Conservat, Yulin 537000, Peoples R China

3.Guangxi Acad Agr Sci, Guangxi Subtrop Crops Res Inst, Nanning 530001, Peoples R China

4.Guangxi Key Lab Qual & Safety Control Subtrop Frui, Nanning 530001, Peoples R China

5.Yulin Normal Univ, Coll Smart Agr, Yulin 537000, Peoples R China

6.Guangxi Zhuang Autonomous Reg Engn Res Ctr Facil A, Yulin 537000, Peoples R China

关键词： microbial assembly; fungal beta-diversity; nutrient stoichiometry; rhizosphere effect; coastal conservation

期刊名称：DIVERSITY-BASEL （ 影响因子：2.1； 五年影响因子：2.3 ）

ISSN：

年卷期： 2025 年 17 卷 4 期

页码：

收录情况： SCI

摘要： Understanding soil microbial community assembly in endangered mangrove ecosystems is crucial for ecological conservation. This study investigated the diversity and drivers of soil microbiomes across Barringtonia racemosa communities (pure: T1; associated: T2, T3) in China's Leizhou Peninsula, using SMRT sequencing and phospholipid fatty acid analysis. The results reveal that pure B. racemosa communities (T1) harbored the highest microbial diversity (Chao1: 2980 bacteria, 14,378 fungal OTUs), with Pseudomonadota (37.6%) and Ascomycota (52.6%) as dominant phyla. Fungal communities exhibited 3.2-fold higher beta-diversity variability than bacteria across communities (Bray-Curtis; p < 0.01). Redundancy analysis identified soil organic carbon (SOC), available nitrogen (SAN), and leaf manganese as primary drivers, collectively explaining 72.4% of microbial variation (p = 0.003). Notably, pure communities showed an elevated SOC (74.3 mg/kg) and fungal: bacterial ratio (0.19 vs. 0.13-0.14 in associated communities), indicating fungal dominance in carbon-rich sediments. Conversely, rice field controls displayed distinct SAP/SAK patterns reflecting agricultural impacts. These findings demonstrate that the B. racemosa community structure differentially regulates fungal assemblages more strongly than bacterial communities, providing critical insights for mangrove restoration through microbial-informed management.

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