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| Bacterial community structures in sediments are affected by different plants in Hongze Lake wetlands |
| Received:September 12, 2017 |
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| KeyWord:high-throughput sequencing;bacterial community;sediment;Hongze Lake |
| Author Name | Affiliation | E-mail | | WU Xian-jun | College of biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
Collaborative Innovation Center of Sustainable Forestry in Southern China of Jiangsu Province, Nanjing Forestry University, Nanjing 210037, China | | | YANG Hong | College of biology and the Environment, Nanjing Forestry University, Nanjing 210037, China | | | CHENG Rui | College of biology and the Environment, Nanjing Forestry University, Nanjing 210037, China | | | SHENG Yi | College of biology and the Environment, Nanjing Forestry University, Nanjing 210037, China | | | HAN Jian-gang | College of biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
Collaborative Innovation Center of Sustainable Forestry in Southern China of Jiangsu Province, Nanjing Forestry University, Nanjing 210037, China | | | LI Ping-ping | College of biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
Collaborative Innovation Center of Sustainable Forestry in Southern China of Jiangsu Province, Nanjing Forestry University, Nanjing 210037, China | ppli@njfu.edu.cn |
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| Abstract: |
| To study the effects of plant species on sediment bacterial community structure, we collected samples from three different wetlands dominated by Nelumbo nucifera, Zizania caduciflora, and Phragmites australis in the Hongze Lake area and analyzed the samples using the high-throughput sequencing technique. The results showed that the number of Operational Taxonomic Units(OTUs) for each sample from the three wetlands were 1494, 1503, and 1600, respectively. At the phylum level, the dominant phyla in the sediments were Proteobacteria, Chloroflexi, Acidobacteria, Nitrospirae, Bacteroidetes, and Firmicutes. At the genus level, high abundances of Nitrospira and Nitrosomonadaceae, which are mainly involved in nitrification, were observed in all sediment samples. The results also showed that the bacterial community structure at the Phragmites australis site was similar to that at the Zizania caduciflora site. The TOC and TN contents at the Nelumbo nucifera site were significantly lower than at the Phragmites australis and Zizania caduciflora sites. Furthermore, significant differences in bacterial community structure were observed between the Nelumbo nucifera site and the Phragmites australis or Zizania caduciflora sites. The relative abundances of Methylo tenera, Bacillus, Pseudomonas, and Lactococcus, with their high nitrification capacities, meant that nitrification at the Nelumbo nucifera site was over 10 times higher than at the Phragmites australis or Zizania caduciflora sites. This indicated that the plant species had a significant influence on the C/N contents and bacterial community structure in the wetland sediments. Furthermore, Nelumbo nucifera has a greater potential for denitrification compared to Zizania caduciflora and Phragmites australis, which means that this plant can reduce the risk of eutrophication. |
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