Responses of Bacterial Taxonomical Diversity Indicators to Pollutant Loadings in Experimental Wetland Microcosms

Roy, Subhomita Ghosh; Wimpee, Charles F.; McGuire, S. Andrew; Ehlinger, Timothy J.

doi:10.3390/w14020251

Cited by 5 publications

(3 citation statements)

References 68 publications

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“…The richness and diversity of bacterial communities are important indicators of the stability of aquatic ecosystems [51], as it is closely related to the nutrient content. Thus, they can be used as potential biological indicators [52]. N and P are important nutrients for bacterial survival and reproduction.…”

Section: Correlation Between the Structure And Diversity Of Bacterial...mentioning

confidence: 99%

Structural Diversity of Bacterial Communities and Its Relation to Environmental Factors in the Surface Sediments from Main Stream of Qingshui River

Zhao

Qiu

et al. 2022

Water

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This paper aims to preliminarily understand the structure and diversity of the bacterial community in the sediments of the Qingshui River, and analyze the differences of dominant bacteria in different river reaches, and identify the influence degree of environmental factors. In this study, surface sediments of the main stream of the Qingshui River were selected to analyze both bacterial community composition and a diversity index using the high-throughput sequencing analysis of bacterial 16S rDNA, further exploring their relationships with environmental factors. Results showed that 16,855 OTUs in the surface sediments belonged to 66 phyla, 164 classes, 274 orders, 317 families, and 501 genera of bacteria, while carbon/nitrogen-fixing bacteria were dominant at the class and genus level. There was a significant (p < 0.05) spatial difference between bacterial species composition and the diversity index in surface sediments. Proteobacteria was the most abundant phylum in the sediments of the main stream of the Qingshui River, with an average abundance of 48.15%, followed by Bacteroidetes (21.74%) and Firmicutes (5.71%). The abundance of Alphaproteobacteria in Proteobacteria was the highest (15.38%) and followed by Flavobacteriia in Bacteroidetes (11.57%). The most dominant bacteria genera were different at different areas. The most dominant genera were Phyllobacterium in Kaicheng, Qiying, Liwang, Tongxin and Changshantou, with relative abundances of 4.27%, 4.67%, 5.88%, 4.15% and 6.22%, respectively. Flavobacterium was the most dominant genus in both Dongjiao and Sanying, with a relative abundance of 5.03% and 5.84%, respectively. Rhodobacter was the most dominant genus in Hexi, with a relative abundance of 8.29%. Gillisia was the most dominant genus in Quanyanshan, with a relative abundance of 5.51%. Pearson correlation analysis further indicated that NH4+, pH, and Cr were the main factors affecting the bacterial community structure and diversity in surface sediments. Therefore, our findings suggest that both nutrient elements (i.e., N) and toxic heavy metalloids affect the abundance and diversity of bacteria in surface sediments from the main stream of the Qingshui River. Areas of the river sampled in this study provide the biggest microbial sampling coverage to date. The results provide a preliminary understanding of bacterial communities in sediments of different reaches of the Qingshui River, and provide a reference for further research on the application of functional bacteria in pollution control of the Qingshui River.

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Section: Correlation Between the Structure And Diversity Of Bacterial...mentioning

confidence: 99%

Structural Diversity of Bacterial Communities and Its Relation to Environmental Factors in the Surface Sediments from Main Stream of Qingshui River

Zhao

Qiu

et al. 2022

Water

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“…Halotolerant Fusibacter spp. are noted for their capacity to tolerate highly saline ( Serrano et al, 2017 ; Selivanova et al, 2018 ), and HM enriched environments ( Serrano et al, 2017 ; Meng et al, 2021 ; Ghosh Roy et al, 2022 ). Fusibacter spp.…”

Section: Discussionmentioning

confidence: 99%

Diversity and functional traits of indigenous soil microbial flora associated with salinity and heavy metal concentrations in agricultural fields within the Indus Basin region, Pakistan

et al. 2022

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Soil salinization and heavy metal (HM) contamination are major challenges facing agricultural systems worldwide. Determining how soil microbial communities respond to these stress factors and identifying individual phylotypes with potential to tolerate these conditions while promoting plant growth could help prevent negative impacts on crop productivity. This study used amplicon sequencing and several bioinformatic programs to characterize differences in the composition and potential functional capabilities of soil bacterial, fungal, and archaeal communities in five agricultural fields that varied in salinity and HM concentrations within the Indus basin region of Pakistan. The composition of bacteria with the potential to fix atmospheric nitrogen (N) and produce the enzyme 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase were also determined. Microbial communities were dominated by: Euryarchaeota (archaea), Actinobacteria, Proteobacteria, Planctomycetota, Firimicutes, Patescibacteria and Acidobacteria (bacteria), and Ascomycota (fungi), and all soils contained phylotypes capable of N-fixation and ACC-deaminase production. Salinity influenced bacterial, but not archaeal or fungal communities. Both salinity and HM altered the relative abundance of many phylotypes that could potentially promote or harm plant growth. These stress factors also appeared to influence the potential functional capabilities of the microbial communities, especially in their capacity to cycle phosphorous, produce siderophores, and act as symbiotrophs or pathotrophs. Results of this study confirm that farms in this region are at risk due to salinization and excessive levels of some toxic heavy metals, which could negatively impact crop and human health. Changes in soil microbial communities and their potential functional capabilities are also likely to affect several critical agroecosystem services related to nutrient cycling, pathogen suppression, and plant stress tolerance. Many potentially beneficial phylotypes were identified that appear to be salt and HM tolerant and could possibly be exploited to promote these services within this agroecosystem. Future efforts to isolate these phylotypes and determine whether they can indeed promote plant growth and/or carry out other important soil processes are recommended. At the same time, identifying ways to promote the abundance of these unique phylotypes either through modifying soil and crop management practices, or developing and applying them as inoculants, would be helpful for improving crop productivity in this region.

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“…Analysis of microbial diversity can be important bioindicators for environmental contamination [8] , [9], [10] [11] . Many studies has related larger heterogeneity of microbiome, or larger diversity of functional groups, to superior environmental quality [12] [11], since this can make an ecosystem more dynamic and resilient, on hypothesis of occurrence of atypical events [13].…”

Section: Introductionmentioning

confidence: 99%

Bacterial Diversity in Estuarine Sediments in Brazilian Coastal: A Focus in Bacterial Resistance

dos Santos,

de Santana,

Cruz

et al. 2023

Preprint

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Estuaries are final depositional environments of sediments transported along rivers. Therefore, they give a generalized dimension about the human effluents released in water systems. The development of molecular techniques allowed the study of environmental DNA (eDNA), which can provide a real dimension about the functioning of the microbial communities of those environments and the impacts of human activities. In this context, antimicrobial resistance is an emerging problem, caused by irresponsible use of antimicrobial drugs in human and animal health, which has contributed to a selection of bacteria resistant to these drugs. The objective of this study is to identify the main phyla of bacteria and to detect the presence of Antibiotic Resistance Genes (ARGs) in different mangroves environments. We observed significant differences between ARGs quantity in each point. Samples collected on Guaibim-2 and Una had bigger diversity of ARGs, while Guaibim-1 had less AGRs diversity. The predominant phyla in all of the samples was Proteobacteria, Actinobacteria and Firmecutes. We detectedEnterococcus faecium, Acinetobacter sp, Klebsiella pneumoniae, Enterococcus faeciumandEnterobacter cloacae,listed bacteria for priority surveillance for World Health Organization on points Una and Guaibim-2.

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Responses of Bacterial Taxonomical Diversity Indicators to Pollutant Loadings in Experimental Wetland Microcosms

Cited by 5 publications

References 68 publications

Structural Diversity of Bacterial Communities and Its Relation to Environmental Factors in the Surface Sediments from Main Stream of Qingshui River

Structural Diversity of Bacterial Communities and Its Relation to Environmental Factors in the Surface Sediments from Main Stream of Qingshui River

Diversity and functional traits of indigenous soil microbial flora associated with salinity and heavy metal concentrations in agricultural fields within the Indus Basin region, Pakistan

Bacterial Diversity in Estuarine Sediments in Brazilian Coastal: A Focus in Bacterial Resistance

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