Sediment Depth-Dependent Spatial Variations of Bacterial Communities in Mud Deposits of the Eastern China Marginal Seas
The mud sediments of the eastern China marginal seas (ECMS) are deposited under different hydrodynamic conditions with different organic matter sources. These events have been demonstrated to exert significant influences on microbial communities and biogeochemical processes in surface sediments. How...
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| Format: | Article |
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Frontiers Media S.A.
2018-05-01
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| Series: | Frontiers in Microbiology |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fmicb.2018.01128/full |
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| author | Yanlu Qiao Yanlu Qiao Jiwen Liu Jiwen Liu Meixun Zhao Meixun Zhao Xiao-Hua Zhang Xiao-Hua Zhang |
| author_facet | Yanlu Qiao Yanlu Qiao Jiwen Liu Jiwen Liu Meixun Zhao Meixun Zhao Xiao-Hua Zhang Xiao-Hua Zhang |
| author_sort | Yanlu Qiao |
| collection | DOAJ |
| description | The mud sediments of the eastern China marginal seas (ECMS) are deposited under different hydrodynamic conditions with different organic matter sources. These events have been demonstrated to exert significant influences on microbial communities and biogeochemical processes in surface sediments. However, the extent to which such effects occur in subsurface microbial communities remains unclear. In this study, both horizontal and vertical (five sites, each for eight layers) distributions of bacterial abundance and community composition in mud deposits of the South Yellow Sea (SYS) and East China Sea (ECS) were investigated by quantitative PCR and Illumina sequencing of the 16S rRNA gene. Both bacterial abundance and diversity were higher in the ECS than in the SYS, and tended to be higher in up than in deep layers. Proteobacteria (JTB255 marine benthic group), Acidobacteria and Bacteroidetes were dominant in the upper layers, whereas Lactococcus, Pseudomonas, and Dehalococcoidia were enriched in the deep layers. The bacterial communities in surface and subsurface sediments showed different inter-taxa relationships, indicating contrasting co-occurrence patterns. The bacterial communities in the upper layer samples clustered in accordance with mud zones, whereas those in the deep layer samples of all sites tended to cluster together. TOC δ13C and TON δ15N significantly affected the bacterial community composition, suggesting that the abundance and composition of organic matter played critical roles in shaping of sedimentary bacterial communities. This study provides novel insights into the distribution of subsurface bacterial communities in mud deposits of the ECMS, and provides clues for understanding the biogeochemical cycles in this area. |
| first_indexed | 2024-12-20T09:10:15Z |
| format | Article |
| id | doaj.art-50ec2013c00b4cde825b979ad3a978a7 |
| institution | Directory Open Access Journal |
| issn | 1664-302X |
| language | English |
| last_indexed | 2024-12-20T09:10:15Z |
| publishDate | 2018-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj.art-50ec2013c00b4cde825b979ad3a978a72022-12-21T19:45:35ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2018-05-01910.3389/fmicb.2018.01128259428Sediment Depth-Dependent Spatial Variations of Bacterial Communities in Mud Deposits of the Eastern China Marginal SeasYanlu Qiao0Yanlu Qiao1Jiwen Liu2Jiwen Liu3Meixun Zhao4Meixun Zhao5Xiao-Hua Zhang6Xiao-Hua Zhang7Laboratory of Marine Microbiology, College of Marine Life Sciences, Ocean University of China, Qingdao, ChinaLaboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, ChinaLaboratory of Marine Microbiology, College of Marine Life Sciences, Ocean University of China, Qingdao, ChinaLaboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, ChinaLaboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, ChinaKey Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, ChinaLaboratory of Marine Microbiology, College of Marine Life Sciences, Ocean University of China, Qingdao, ChinaLaboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, ChinaThe mud sediments of the eastern China marginal seas (ECMS) are deposited under different hydrodynamic conditions with different organic matter sources. These events have been demonstrated to exert significant influences on microbial communities and biogeochemical processes in surface sediments. However, the extent to which such effects occur in subsurface microbial communities remains unclear. In this study, both horizontal and vertical (five sites, each for eight layers) distributions of bacterial abundance and community composition in mud deposits of the South Yellow Sea (SYS) and East China Sea (ECS) were investigated by quantitative PCR and Illumina sequencing of the 16S rRNA gene. Both bacterial abundance and diversity were higher in the ECS than in the SYS, and tended to be higher in up than in deep layers. Proteobacteria (JTB255 marine benthic group), Acidobacteria and Bacteroidetes were dominant in the upper layers, whereas Lactococcus, Pseudomonas, and Dehalococcoidia were enriched in the deep layers. The bacterial communities in surface and subsurface sediments showed different inter-taxa relationships, indicating contrasting co-occurrence patterns. The bacterial communities in the upper layer samples clustered in accordance with mud zones, whereas those in the deep layer samples of all sites tended to cluster together. TOC δ13C and TON δ15N significantly affected the bacterial community composition, suggesting that the abundance and composition of organic matter played critical roles in shaping of sedimentary bacterial communities. This study provides novel insights into the distribution of subsurface bacterial communities in mud deposits of the ECMS, and provides clues for understanding the biogeochemical cycles in this area.https://www.frontiersin.org/article/10.3389/fmicb.2018.01128/fullbacterial communitieseastern China marginal seasspatial distributiondiversitymud deposits |
| spellingShingle | Yanlu Qiao Yanlu Qiao Jiwen Liu Jiwen Liu Meixun Zhao Meixun Zhao Xiao-Hua Zhang Xiao-Hua Zhang Sediment Depth-Dependent Spatial Variations of Bacterial Communities in Mud Deposits of the Eastern China Marginal Seas Frontiers in Microbiology bacterial communities eastern China marginal seas spatial distribution diversity mud deposits |
| title | Sediment Depth-Dependent Spatial Variations of Bacterial Communities in Mud Deposits of the Eastern China Marginal Seas |
| title_full | Sediment Depth-Dependent Spatial Variations of Bacterial Communities in Mud Deposits of the Eastern China Marginal Seas |
| title_fullStr | Sediment Depth-Dependent Spatial Variations of Bacterial Communities in Mud Deposits of the Eastern China Marginal Seas |
| title_full_unstemmed | Sediment Depth-Dependent Spatial Variations of Bacterial Communities in Mud Deposits of the Eastern China Marginal Seas |
| title_short | Sediment Depth-Dependent Spatial Variations of Bacterial Communities in Mud Deposits of the Eastern China Marginal Seas |
| title_sort | sediment depth dependent spatial variations of bacterial communities in mud deposits of the eastern china marginal seas |
| topic | bacterial communities eastern China marginal seas spatial distribution diversity mud deposits |
| url | https://www.frontiersin.org/article/10.3389/fmicb.2018.01128/full |
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