Integrating microbial biomass, composition and function to discern the level of anthropogenic activity in a river ecosystem

Liao, Kailingli; Bai, Yaohui; Huo, Yang; Jian, Zhiyu; Hu, Wanchao; Zhao, Chen; Qu, Jiuhui

doi:10.1016/j.envint.2018.04.003

Cited by 100 publications

(38 citation statements)

References 46 publications

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“…For example, different bacterial indicators in river sediments under different environmental conditions were determined by linear discriminant analysis effect size (LEfSe) analysis [16,17]. In addition, indicator species analysis methods were used to determine bacterial indicators in rivers under different land use types and human activity gradients [18]. However, most of these studies focused only on the interaction between river microorganisms and environmental pressure and ignored the interactions among microorganisms.…”

Section: Introductionmentioning

confidence: 99%

Impact of long-term industrial contamination on the bacterial communities in urban river sediments

Zhang

et al. 2020

BMC Microbiol

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Background: The contamination of the aquatic environment of urban rivers with industrial wastewater has affected the abiotic conditions and biological activities of the trophic levels of the ecosystem, particularly sediments. However, most current research about microorganism in urban aquatic environments has focused on indicator bacteria related to feces and organic pollution. Meanwhile, they ignored the interactions among microorganisms. To deeply understand the impact of industrial contamination on microbial community, we study the bacterial community structure and diversity in river sediments under the influence of different types of industrial pollution by Illumina MiSeq high-throughput sequencing technology and conduct a more detailed analysis of microbial community structure through co-occurrence networks. Results: The overall community composition and abundance of individual bacterial groups differed between samples. In addition, redundancy analysis indicated that the structure of the bacterial community in river sediments was influenced by a variety of environmental factors. TN, TP, TOC and metals (Cu, Zn and Cd) were the most important driving factors that determined the bacterial community in urban river sediments (P < 0.01). According to PICRUSt analysis, the bacterial communities in different locations had similar overall functional profiles. It is worth noting that the 15 functional genes related to xenobiotics biodegradation and metabolism were the most abundant in the same location. The non-random assembly patterns of bacterial composition in different types of industrially polluted sediments were determined by a co-occurrence network. Environmental conditions resulting from different industrial pollutants may play an important role in determining their co-occurrence patterns of these bacterial taxa. Among them, the bacterial taxa involved in carbon and nitrogen cycles in module I were relatively abundant, and the bacterial taxa in module II were involved in the repair of metal pollution. Conclusions: Our data indicate that long-term potential interactions between different types of industrial pollution and taxa collectively affect the structure of the bacterial community in urban river sediments.

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Section: Introductionmentioning

confidence: 99%

Impact of long-term industrial contamination on the bacterial communities in urban river sediments

Zhang

et al. 2020

BMC Microbiol

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“…Finally, changes in land use seem to have a great impact on factors structuring microbial communities in aquatic environments. Using the gradient polluted of a subtropical river, the river Chaobai in China, Liao et al (2018) found differential partitioning in microbial biomass, metabolism, and community composition among three areas with different human activities, less-disturbed mountain areas, urban and agricultural dominated areas. Bacterial communities from mountain areas had significantly higher richness and phylogenetic diversity.…”

Section: Impacts On Bacterial Community's Structurementioning

confidence: 99%

Anthropogenic impacts on aquatic bacteria: a perspective from the tropics

Melo

Sarmento

2019

Acta Limnol. Bras.

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Bacterioplankton comprises a highly diverse group of microorganisms, which are dominant in aquatic ecosystems, and play a central role in ecosystem functioning and biogeochemical cycles. Due to their high turnover and dispersal rates, as well as high adaptability and plasticity, microbes are likely to respond quickly to environmental changes and perturbations on their ecosystems. In this opinion paper, we reviewed some studies that addressed bacterial community’s responses to anthropogenic impacts in their aquatic environments. Inorganic nutrients and organic matter inputs from the catchment areas are likely to increase due to changes in climate and land use. These changes will impact the microbial community composition and metabolism, as well the amount of energy and carbon flowing through aquatic food webs as mostly demonstrated in studies from temperate and boreal systems. However, due to the low number of studies on microbial communities in tropical ecosystems, our understanding of how they will respond to perturbations in this distinct environmental context is still limited. Research in microbial ecology in southern countries is still in its infancy and deserves more attention in the future, since tropical aquatic ecosystems are hotspots of biodiversity, host most of the world freshwater reserves, and play a key role in global biogeochemical cycles.

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“…Noteworthily, studies related to the survey of ARGs in drinking water source were not frequently reported. Drinking water usually originated from the surface water like rivers and lakes reservoirs which could be easily impacted by anthropogenic activities such as livestock and poultry breeding, agricultural and wastewater discharge [22]. In contract, most of the reservoirs, often acting as main and important drinking water sources relied on an exogenous source, are located in areas with little human activities [23].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of antibiotics and antibiotic resistance genes in Qingcaosha Reservoir in Yangtze River Delta, China

Zhao

Guo

et al. 2020

Environ Sci Eur

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Background: Aquatic ecosystems are considered to be among the most important reservoirs of antibiotic resistance genes (ARGs). Drinking water sources could serve as critical points of ARGs transfer from environment to human. In this study, the distribution of antibiotics and ARGs across Qingcaosha Reservoir located in the Yangtze River Delta during three seasons was investigated to characterize the pollution patterns. Results: Sulfamethoxazole, sulfamonomethoxine and penicillin G potassium salt were the dominant antibiotics in this reservoir. Sulfonamide resistance genes (sul1 and sul2) were the most prevalent and predominant genes. Higher total relative abundance of the ARGs was detected in the site closest to the inflow than those in other sites. Overall, the concentrations of antibiotics in May were relatively lower than those in November and February. Correlation analysis indicated sul1, ermB and mphA had positive correlation with corresponding antibiotics in February and sul1, sul2, ermB and mphA was also positively correlated to intI1. Conclusion: In conclusion, antibiotics and ARGs were widespread in Qingcaosha Reservoir. Our results indicated that the drinking water reservoir might serve as gene reservoir for antibiotic resistance and mobile gene element intI1 can serve as a medium to contribute to the widespread of various ARGs. As the ARGs abundance was found to be higher in the inflow of the reservoir compared to the outflow, it is considered that reservoir could serve as a functional area contributing to the elimination or dilution of ARGs.

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Integrating microbial biomass, composition and function to discern the level of anthropogenic activity in a river ecosystem

Cited by 100 publications

References 46 publications

Impact of long-term industrial contamination on the bacterial communities in urban river sediments

Impact of long-term industrial contamination on the bacterial communities in urban river sediments

Anthropogenic impacts on aquatic bacteria: a perspective from the tropics

Characteristics of antibiotics and antibiotic resistance genes in Qingcaosha Reservoir in Yangtze River Delta, China

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