Composition of Bacterial Communities in Oil-Contaminated Bottom Sediments of the Kamenka River

Егорова, Д. О.; Sannikov, P.Yu.; Khotyanovskaya, Yuliya; Buzmakov, S.A.

doi:10.3103/s0096392523010029

Cited by 3 publications

(2 citation statements)

References 23 publications

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“…The major groups detected in our sediments (except for Acidobacteriota) were also found in the bottom of the Kamenka River (Russian), which flows through oil and gas fields. These sediments were also highly contaminated with hydrocarbons, despite the absence of oil installations near the river [ 49 ]. Although less frequently, Acidobacteriota has also been associated with soils contaminated by petroleum hydrocarbons [ 50 ].…”

Section: Discussionmentioning

confidence: 99%

Bacterial Diversity in Old Hydrocarbon Polluted Sediments of Ecuadorian Amazon River Basins

Corral-García,

Molina,

Bautista

et al. 2024

Toxics

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The Ecuadorian Amazon rainforest stands out as one of the world’s most biodiverse regions, yet faces significant threats due to oil extraction activities dating back to the 1970s in the northeastern provinces. This research investigates the environmental and societal consequences of prolonged petroleum exploitation and oil spills in Ecuador’s Amazon. Conducted in June 2015, the study involved a comprehensive analysis of freshwater sediment samples from 24 locations in the Rio Aguarico and Napo basins. Parameters such as water and air temperature, conductivity, soil pH, and hydrocarbon concentrations were examined. Total petroleum hydrocarbon (TPH) concentrations ranged from 9.4 to 847.4 mg kg−1, with polycyclic aromatic hydrocarbon (PAH) levels varying from 10.15 to 711.1 mg kg−1. The pristane/phytane ratio indicated historic hydrocarbon pollution in 8 of the 15 chemically analyzed sediments. Using non-culturable techniques (Illumina), bacterial analyses identified over 350 ASV, with prominent families including Comamonadaceae, Chitinophagaceae, Anaeromyxobacteraceae, Sphingomonadaceae, and Xanthobacteraceae. Bacterial diversity, assessed in eight samples, exhibited a positive correlation with PAH concentrations. The study provides insights into how microbial communities respond to varying levels of hydrocarbon pollution, shedding light on the enduring impact of oil exploitation in the Amazonian region. Its objective is to deepen our understanding of the environmental and human well-being in the affected area, underscoring the pressing need for remedial actions in the face of ongoing ecological challenges.

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Section: Discussionmentioning

confidence: 99%

Bacterial Diversity in Old Hydrocarbon Polluted Sediments of Ecuadorian Amazon River Basins

Corral-García,

Molina,

Bautista

et al. 2024

Toxics

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“… Sutton et al (2013) similarly showed that Proteobacteria was the dominant phylum in oil-contaminated soils. In addition, we found that the following phyla were relatively abundant: Acidobacteriota, which may be related to soil organic matter content ( Shelyakin et al, 2022 ); Gemmatimonadota, which participates in the detoxification and degradation of organic pollutants and has a high tolerance to organic pollutants ( Zhang et al, 2022 ); and Actinobacteriota, which has been reported as one of the most common bacteria in oil-contaminated soils ( Egorova et al, 2023 ).…”

Section: Discussionmentioning

confidence: 99%

Biochar-bacteria-plant combined potential for remediation of oil-contaminated soil

Fang,

Zhang,

Zheng

et al. 2024

Front. Microbiol.

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Oil pollution is a common type of soil organic pollution that is harmful to the ecosystem. Bioremediation, particularly microbe-assisted phytoremediation of oil-contaminated soil, has become a research hotspot in recent years. In order to explore more appropriate bioremediation strategies for soil oil contamination and the mechanism of remediation, we compared the remediation effects of three plants when applied in combination with a microbial agent and biochar. The combined remediation approach of Tagetes erecta, microbial agent, and biochar exhibited the best plant growth and the highest total petroleum hydrocarbons degradation efficiency (76.60%). In addition, all of the remediation methods provided varying degrees of restoration of carbon and nitrogen contents of soils. High-throughput sequencing found that microbial community diversity and richness were enhanced in most restored soils. Some soil microorganisms associated with oil degradation and plant growth promotion such as Cavicella, C1_B045, Sphingomonas, MND1, Bacillus and Ramlibacter were identified in this study, among which Bacillus was the major component in the microbial agent. Bacillus was positively correlated with all soil remediation indicators tested and was substantially enriched in the rhizosphere of T. erecta. Functional gene prediction of the soil bacterial community based on the KEGG database revealed that pathways of carbohydrate metabolism and amino acid metabolism were up-regulated during remediation of oil-contaminated soils. This study provides a potential method for efficient remediation of oil-contaminated soils and thoroughly examines the biochar–bacteria–plant combined remediation mechanisms of oil-contaminated soil, as well as the combined effects from the perspective of soil bacterial communities.

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Insights into the Response and Evolution of Microbial Communities During Long-Term Natural Remediation of Contaminated Abandoned Shale Gas Wells

Ren,

Chen,

Shang

et al. 2024

Water Air Soil Pollut

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Composition of Bacterial Communities in Oil-Contaminated Bottom Sediments of the Kamenka River

Cited by 3 publications

References 23 publications

Bacterial Diversity in Old Hydrocarbon Polluted Sediments of Ecuadorian Amazon River Basins

Bacterial Diversity in Old Hydrocarbon Polluted Sediments of Ecuadorian Amazon River Basins

Biochar-bacteria-plant combined potential for remediation of oil-contaminated soil

Insights into the Response and Evolution of Microbial Communities During Long-Term Natural Remediation of Contaminated Abandoned Shale Gas Wells

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