互花米草入侵对广西北部湾盐沼湿地土壤微生物的影响  

Effects of Spartina alterniflora invasion on soil microbial community structure in salt marsh wetland in Beibu Gulf, Guangxi

作　　者：徐惠民 陈振华 王俊健 谭沉艳 蒙泓吉 戴梦菁 张燕 丛丕福[4] XU Huimin;CHEN Zhenhua;WANG Junjian;TAN Chenyan;MENG Hongji;DAI Mengjing;ZHANG Yan;CONG Peifu(College of Marine Sciences,Beibu Gulf University,Qinzhou 535011,China;Guangxi Key Laboratory of Marine Environmental Change and Disaster in Beibu Gulf,Qinzhou 535011,China;Beibu Gulf Marine Ecological Environment Field Observation and Research Station of Guangxi,Qinzhou 535011,China;National Marine Environmental Monitoring Center,Dalian 116023,China)

机构地区：[1]北部湾大学海洋学院,广西钦州535011 [2]广西北部湾海洋环境变化与灾害研究重点实验室,广西钦州535011 [3]北部湾海洋生态环境广西野外科学观测研究站,广西钦州535011 [4]国家海洋环境监测中心,辽宁大连116023

出　　处：《海洋环境科学》2025年第1期1-9,共9页Marine Environmental Science

基　　金：广西自然科学基金(2024JJH130005);广西自然科学基金(2020JJA150012);广西重点研发计划(AB21076016);广西北部湾海洋环境变化与灾害研究重点实验室自主课题(2022ZD05);北部湾海洋生态环境广西野外科学观测研究站(科研能力建设)(桂科23-026-271)。

摘　　要：为探究互花米草入侵后土壤微生物群落结构的变化机制,在广西北部湾盐沼湿地选择4组互花米草盐沼湿地土壤和光滩盐沼湿地土壤对照站位,采集土样进行16S rDNA测序,分析土壤微生物群落组成和多样性差异,利用典范对应分析方法(CCA)研究微生物与理化因子间的关系。结果表明,互花米草入侵广西北部湾盐沼湿地后,土壤微生物群落优势种发生改变,丰度(门水平)居前5位的微生物为Proteobacteria> Acidobacteria> Chloroflexi> Actinobacteria> Bacteroidetes。其中,互花米草的指示性物种(Chloroflexi)由第4位上升至第3位;土壤微生物多样性波动明显;CCA分析表明,土壤盐度和土壤湿度是互花米草入侵后土壤微生物群落变化的主要因素(P<0.05)。To explore the regime shift of soil microbial community structure after Spartina alterniflora invasion,four soil samples were collected from mudflats with and without S.alterniflora in Beibu Gulf,Guangxi.16S rDNA was used to analyze the differences in soil microbial community composition and diversity.Canonical correspondence analysis was used to study the correlation between soil microorganisms and soil physio-chemical characteristics.The results showed that the rank of dominant species of soil microbial community changed after S.alterniflora invasion in the mudflat of Beibu Gulf,Guangxi.The top five phylum in abundance were Proteobacteria>Acidobacteria>Chloroflexi>Acinobacteria>Bacteroidetes.Among them,the indicator species of S.alterniflora,i.e.,Chloroflexi increased from the top fourth to the third.Soil microbial diversity fluctuated significantly.CCA analysis showed that soil salinity and humidity were the main factors affecting the regime shift of microbial community after S.alterniflora invasion(P<0.05).

关 键 词：互花米草 土壤微生物 盐沼湿地 环境效应 土壤理化因子 北部湾 

分 类 号：X171[环境科学与工程—环境科学]