Dissolved organic matter release in overlying water and bacterial community shifts in biofilm during the decomposition of Myriophyllum verticillatum

The Science of the Total Environment
Lisha ZhangLiying Yan

Abstract

This study investigated the alterations in biomass, nutrients and dissolved organic matter concentration in overlying water and determined the bacterial 16S rRNA gene in biofilms attached to plant residual during the decomposition of Myriophyllum verticillatum. The 55-day decomposition experimental results show that plant decay process can be well described by the exponential model, with the average decomposition rate of 0.037d-1. Total organic carbon, total nitrogen, and organic nitrogen concentrations increased significantly in overlying water during decomposition compared to control within 35d. Results from excitation emission matrix-parallel factor analysis showed humic acid-like and tyrosine acid-like substances might originate from plant degradation processes. Tyrosine acid-like substances had an obvious correlation to organic nitrogen and total nitrogen (p<0.01). Decomposition rates were positively related to pH, total organic carbon, oxidation-reduction potential and dissolved oxygen but negatively related to temperature in overlying water. Microbe densities attached to plant residues increased with decomposition process. The most dominant phylum was Bacteroidetes (>46%) at 7d, Chlorobi (20%-44%) or Proteobacteria (25%-...Continue Reading

Citations

Nov 27, 2019·International Journal of Environmental Research and Public Health·Lingzhan MiaoJun Hou
Dec 19, 2018·Frontiers in Plant Science·Cristina RibaudoVincent Bertrin
May 7, 2019·International Journal of Molecular Sciences·Ali Mohamed ElyamineCheng Xiao Hu
Jul 8, 2021·Journal of Hazardous Materials·Okugbe Ebiotubo OhoreWenzjun Zhang
Sep 15, 2021·Applied Microbiology and Biotechnology·Hai-Zhen ZhuShuang-Jiang Liu

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