Microbial communities in petroleum-contaminated seasonally frozen soil and their response to temperature changes

Wang, Xusheng; Guan, Xiangyu; Zhang, Xiaojuan; Xiang, Shizheng; Liu, Mingzhu

doi:10.1016/j.chemosphere.2020.127375

Cited by 21 publications

(4 citation statements)

References 31 publications

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“…In addition, we found that geraniol, limonene and pinene degradation pathways increased significantly in gene abundance in January for river stretch 2. A previous study showed that geraniol was one of the petroleum pollutants (Wang et al ., 2020). Limonene and pinene are terpenoids pollutants and are commonly found in leachates (Eggen et al ., 2010).…”

Section: Discussionmentioning

confidence: 99%

Anthropogenic activities change the relationship between microbial community taxonomic composition and functional attributes

Liu

Wang

Chen

2021

Environmental Microbiology

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Summary Functional redundancy is considered common in microbial systems, but recent studies have challenged this idea. The mechanism for this contradictory result is not clear. However, in this study, we hypothesize that strong environmental filtering which links to the anthropogenic activities is able to weaken microbial functional redundancy. We used metagenome and 16S rRNA gene high‐throughput sequencing to investigate planktonic microbial communities in a subtropical river. We found that the weak anthropogenic activities might result in a low selection pressure in the river upstream area. Therefore, the microbial community functional attributes were stable although the community composition changed with the water temperature and NO3‐N in upstream area (this indicates functional redundancy). However, the strong anthropogenic activities in river downstream area selected pollutant‐degraded functions (e.g. nitrogen metabolism, toluene, xylenes and ethylbenzene degradation) and potentially pollutant‐degraded (tolerant) microbes, and therefore caused the microbial community composition synchronously changed with the variation of community functional attributes. Our results reveal that strong environmental filtering which associates with the anthropogenic activities not only has effects on microbial community composition and community functional attributes but also on their relationships. These results provide a new insight to refine the functional redundancy idea.

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Section: Discussionmentioning

confidence: 99%

Anthropogenic activities change the relationship between microbial community taxonomic composition and functional attributes

Liu

Wang

Chen

2021

Environmental Microbiology

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“…Lastly, using R-3.3.1, KEGG functional prediction was completed based on the Tax4Fun package, and the Spearman correlation coefficient between bacterial phyla and function was calculated using the "psych" package. Data with |r| ≥ 0.6 and p < 0.05 were retained, and a network diagram was constructed using Gephi v0.10 (https://gephi.org/users/ download/, accessed on 6 June 2023) [35].…”

Section: Bioinformatic and Statistical Analysesmentioning

confidence: 99%

Short-Term Simulated Warming Changes the Beta Diversity of Bacteria in Taiga Forests’ Permafrost by Altering the Composition of Dominant Bacterial Phyla

Jiang,

Wu,

Yang

et al. 2024

Forests

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Permafrost is widely degraded in the context of global warming. The spatial distribution of soil microbes in these cold habitats has received a lot of attention. However, knowledge on the changes in permafrost microbial communities following permafrost thaw is still limited. We used permafrost soil from a taiga forest for indoor experiments using pristine soil as a control (CK, −2 °C), simulating warming for 15 days at temperatures of 0 °C (T1), 2 °C (T2), and 4 °C (T3). Amplicons of the hypervariable V4 region of the bacterial 16S rRNA gene were sequenced to identify bacterial communities present in the soils of pristine and warming treatments. Warming increased the average relative abundance of Proteobacteria (5.71%) and decreased that of Actinobacteriota (7.82%). The Beta diversity changed (p = 0.001) and significantly correlated with the pH, microbial biomass carbon (MBC), and available potassium (AK) of the soil (p < 0.05). Warming further increased the Alpha diversity (Simpson index), changing the functional pathways of the bacterial communities, whereby secondary functional pathways produced significant correlations with bacterial phyla (p < 0.05). Combined, the results indicated that short-term warming altered the Beta diversity of soil bacteria in a taiga forest’s permafrost soil by decreasing the abundance of Actinobacteria and increasing that of Ascomycetes, while pH, MBC, and AK were identified as the soil factors influencing the structure and diversity of the bacterial communities.

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“…However, oil leakage might happen in any stage of the oil industry from exploitation, transportation, to storage and processing, causing serious environmental pollution and ecological disasters [2,3]. Oil destroys the structure and affects the permeability of soil [4,5]. In the process of natural degradation of petroleum, toxic intermediate products are formed, which are poisonous to plant roots [6].…”

Section: Introductionmentioning

confidence: 99%

Metagenomics-metabolomics analysis of microbial function and metabolism in petroleum-contaminated soil

Xiao

et al. 2023

Braz J Microbiol

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Contamination of soil by petroleum is becoming increasingly serious in the world today. However, the research on gene functional characteristics, metabolites and distribution of microbial genomes in oil-contaminated soil is limited. Considering that, metagenomic and metabonomic were used to detect microbes and metabolites in oil-contaminated soil, and the changes of functional pathways were analyzed. We found that oil pollution significantly changed the composition of soil microorganisms and metabolites, and promoted the relative abundance of Pseudoxanthomonas, Pseudomonas, Mycobacterium, Immundisolibacter, etc. The degradation of toluene, xylene, polycyclic aromatic hydrocarbon and fluorobenzoate increased in Xenobiotics biodegradation and metabolism. Key monooxygenases and dioxygenase systems were regulated to promote ring opening and degradation of aromatic hydrocarbons. Metabolite contents of polycyclic aromatic hydrocarbons (PAHs) such as 9-fluoronone and gentisic acid increased significantly. The soil microbiome degraded petroleum pollutants into small molecular substances and promoted the bioremediation of petroleum-contaminated soil. Besides, we discovered the complete degradation pathway of petroleum-contaminated soil microorganisms to generate gentisic acid from the hydroxylation of naphthalene in PAHs by salicylic acid. This study offers important insights into bioremediation of oil-contaminated soil from the aspect of molecular regulation mechanism and provides a theoretical basis for the screening of new oil degrading bacteria.

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Microbial communities in petroleum-contaminated seasonally frozen soil and their response to temperature changes

Cited by 21 publications

References 31 publications

Anthropogenic activities change the relationship between microbial community taxonomic composition and functional attributes

Anthropogenic activities change the relationship between microbial community taxonomic composition and functional attributes

Short-Term Simulated Warming Changes the Beta Diversity of Bacteria in Taiga Forests’ Permafrost by Altering the Composition of Dominant Bacterial Phyla

Metagenomics-metabolomics analysis of microbial function and metabolism in petroleum-contaminated soil

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