Response of Planktonic and Benthic Microbial Community to Urban Pollution from Sewage Discharge in Jilin Reach of the Second Songhua River, China

Abstract

To investigate the role of the planktonic/benthic bacterial community in sewage polluted water, the biomass, suspended solids (SS), and chemical oxygen demand (COD) were measured downstream from a discharge point (P0) and reference water point (U1) in the Second Songhua River, China. In addition, 16S rDNA community was analyzed using MOTHUR and the bacterial abundance was assayed by real-time quantitative PCR. The results showed that the SS (14 mg L ). The bacterial diversity of polluted water had a lower richness than that of sediment at P0. Approximately 80% of the detected planktonic and benthic bacteria were anaerobic/ facultative anaerobic bacteria at P0. The most abundance of planktonic bacteria (10 8 copies ng À1) was observed at 100 m downstream of P0 where more ecological nutrients (COD, 64.07 mg L À1) accumulated. However, the benthic bacterial abundance reached the highest value 50 m downstream of P0 where the COD were not the highest. The relationship between the density of planktonic/benthic microbes and COD suggested that planktonic/benthic microbes possessed high degradation capabilities in river and provided good potential purification for the organic materials discharged from urban sewage.

An integrated insight into the response of bacterial communities to anthropogenic contaminants in a river: A case study of the Wonderfonteinspruit catchment area, South Africa

“…Bacterial communities in freshwaters play key roles in biogeochemical cycles. They are responsible for breaking down organic material and remineralizing nutrients, which in turn affect energy flux and circulation of material in the system [1, 2]. Bacterial diversity and species abundance are in turn associated with nutrient availability and the physical environment [3, 4].…”

Distribution patterns of dinoflagellate communities along the Songhua River

“…However, we cannot rule out a possible reason of discrepancy caused by the difference of communities (e.g., dinoflagellate versus phytoplankton). Since the relative contribution of species sorting and dispersal also depends on the taxonomic groups with diverse dispersal abilities and life histories (Beisner et al, 2006; Devercelli et al, 2016; Isabwe et al, 2018; Lin et al, 2014; Xiong et al, 2017), further studies on different taxonomic groups should be performed to verify whether the relative contribution of species sorting and dispersal differ among taxonomic groups.…”

“…Mountain regions were mainly polluted by heavy metals from gold mining and metal smelting (Zou et al, 2010). Urban regions were polluted by organic pollutions mainly discharged by domestic sewage (Wang et al, 2018), and these regions were often characterized by high concentrations of chemical oxygen demand (Lin et al, 2014). Severe nitrogenous and phosphorus pollution derived from non-point pollution of agriculture was severely problematic in rural regions (Yu et al, 2003).…”

Insight into the nitrogen accumulation in urban center river from functional genes and bacterial community

“…Water quality also deeply influences river ecosystem structure, food-web integrity, as well as ecosystem functions and services [16]. Previous studies have demonstrated that flow velocity and contaminants in urban rivers affected sediment oxygen demand, and the structure and integrity of eukaryotic and bacterial communities [14,17,18]. The affected microbial communities in turn disrupted microbial driven self-purification processes, which might aggravate the accumulation of pollution and water quality degradation [8,19].…”