The bacterial diversity and community composition altered in the oxygen minimum zone of the Tropical Western Pacific Ocean
文献类型：CNKI期刊论文
| 作者 | Qiqi SUN; Jinming SONG ; Xuegang LI; Huamao YUAN; Qidong WANG
|
| 发表日期 | 2021-09-15 |
| 出处 | Journal of Oceanology and Limnology
 |
| 关键词 | bacterial diversity community composition oxygen minimum zones(OMZs) dissolved oxygen Tropical Western Pacific Ocean(TWPO) |
| 英文摘要 | The oxygen minimum zones(OMZs) are globally expanding,yet the variation pattern of microbial communities related to dissolved oxygen levels remain unclear.Spatial variability of bacterial diversity and community composition(repre sented by 16 S rRNA) of six stations was investigated within the water column in the seamount area of Tropical Western Pacific Ocean(TWPO) in May 2019.The seawater has dissolved oxygen(DO) concentration of 3.01-6.68 mg/L and the core of the oxygen minimum zones was located between the depths of 650 m and 1 750 m.The bacterial alpha-diversity showed unimodal pattern with the decreasing DO with depths and peaked in the upper oxycline(UO) of OMZs.The bacterial community structure of the mixed layer(ML) and the bottom layer clustered and separated from each other,while those of UO and the OMZ core(OM) clustered and overlapped.Overall,bacterial community composition transitioned from being Alphaproteobacteria and Gammaproteobacteria-dominant in ML to being Gammaproteobacteria and Nitrososphaeria/Deltaproteobacteria-dominant in UO and OM,and then changed to being Clostridia and unidentified Actinobacteria-dominant in the bottom layer.Moreover,both bacterial alpha-diversity and the abundant classes fitted varying sectioned functions with DO.The DO solely explained 40.37% of the variation of bacterial community composition among layers(P<0.001).The predicted function profiling showed that the water column was predominant by chemoheterotrophy,cyanobacteria,and photoautotrophy in ML,by chemoheterotrophy and nitrate/sulfide cycling in UO and OM,and by chemoheterotrophy and ferme ntation in the bottom layer.Our findings revealed the DO-associated variation in bacterial diversity and community composition,and help to clarify the potential responses of microbes and their involved biogeochemical processes to the expansion and intensification of OMZs. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | Supported by the National Natural Science Foundation of China (No.91958103) ; the Science & Technology Basic Resources Investigation Program of China (No.2017FY100802) ; the Strategic Priority Research Program of the Chinese Academy of Sciences (No.XDA19060401) |
| 卷 | v.39期:05页:108-122 |
| 语种 | 英文; |
| 分类号 | Q938.8 |
| ISSN号 | 2096-5508 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/187663]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.LaboratoryforMarineEcologyandEnvironmentalScience,PilotNationalLaboratoryforMarineScienceandTechnology(Qingdao) 2.CenterforOceanMega-Science,ChineseAcademyofSciences 3.ShandongPeanutResearchInstitute 4.KeyLaboratoryofMarineEcologyandEnvironmentalSciences,InstituteofOceanology,ChineseAcademyofSciences 5.UniversityofChineseAcademyofSciences |
| 推荐引用方式 GB/T 7714 | Qiqi SUN,Jinming SONG,Xuegang LI,et al. The bacterial diversity and community composition altered in the oxygen minimum zone of the Tropical Western Pacific Ocean. 2021. |
入库方式： OAI收割
来源：海洋研究所
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