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Environmental Science and Pollution Research

, Volume 25, Issue 26, pp 26550–26561 | Cite as

Bio-cord plays a similar role as submerged macrophytes in harboring bacterial assemblages in an eco-ditch

  • Lei Zhou
  • Chengrong Bai
  • Jian Cai
  • Yang Hu
  • Keqiang Shao
  • Guang Gao
  • Erik Jeppesen
  • Xiangming Tang
Research Article

Abstract

Artificial carriers are widely used to enhance the formation of biofilm and improve pollutants’ removal efficiency in agricultural wastewater treatment ditches (eco-ditches), yet comprehensive insight into their bacterial community is scarce. In this study, bacterial diversities in four different habitats—the water column, surface sediments, submerged macrophytes (Myriophyllum verticillatum L.), and the artificial carriers (bio-cord)—were compared in a Chinese eco-ditch. Comparable richness and evenness of bacterial communities were observed on M. verticillatum and bio-cord, both being higher than for free-living bacteria in the water column but lower than for bacteria in the surface sediment. The highest similarity of bacterial community composition and structure also occurred between M. verticillatum and the bio-cord, dominated by α- and γ-proteobacteria, Verrucomicrobia, and Bacteroidetes. Firmicutes and Planctomycetes, respectively, were the exclusive abundant phyla in M. verticillatum and the bio-cord, probably indicating the unique interaction between M. verticillatum and their epiphytic bacteria. Some abundant genera, such as Roseomonas, Pseudomonas, and Rhodopirellula, which were exclusively observed in M. verticillatum or the bio-cord, have been reported to have the same capacity to remove nitrogen and organic matter in wastewater treatment systems. In conclusion, in the studied eco-ditch, the bio-cord was found to play a similar role as submerged macrophytes in harboring bacterial assemblages, and we therefore propose that bio-cord may be a good alternative or supplement to enhance wastewater treatment in agricultural ditches.

Keywords

Ecological ditch system Artificial carrier Myriophyllum verticillatum L. Biofilm bacterial community 

Notes

Acknowledgments

This work was supported by National Natural Science Foundation of China (41471040, 41501101, 41571462, and 41621002), Key Research Program of Frontier Sciences, CAS (QYZDJ-SSW-DQC008), and the National Water Pollution Control and Management of Science and Technology Major Projects (grant no. 2017ZX07203-004). Erik Jeppesen was supported by the MARS project (Managing Aquatic ecosystems and water Resources under multiple Stress) funded under the 7th EU Framework Programme, Theme 6 (Environment including Climate Change), Contract No. 603378 (http://www.mars-project.eu). We would like to express our deep thanks to Anne Mette Poulsen from Aarhus University for editorial assistance. We are grateful to the staff at the Institute of Lake Bosten of the Environmental Protection Bureau of Bayingolin Mongolia Autonomous Prefecture for their help with sample collection and water chemical analyses. The authors are grateful to the anonymous reviewers for their useful comments on this manuscript.

Supplementary material

11356_2018_2697_MOESM1_ESM.pdf (285 kb)
ESM 1 (PDF 285 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjingPeople’s Republic of China
  2. 2.University of Chinese Academy of SciencesBeijingChina
  3. 3.Department of Bioscience and Arctic Research CentreAarhus UniversitySilkeborgDenmark
  4. 4.Sino-Danish Centre for Education and ResearchBeijingChina

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