K-strategy species plays a pivotal role in the natural attenuation of petroleum hydrocarbon pollution in aquifers
| Autor: | Xiao-Song He, Cui Jun, Tong Liu, Zhao Hangzheng, Longkai Qiao, Qianjuan Shan, Yan Ma, Yanqiu Xu, Minda Yu |
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| Rok vydání: | 2021 |
| Předmět: |
Environmental Engineering
Health Toxicology and Mutagenesis 0211 other engineering and technologies Aquifer 02 engineering and technology 010501 environmental sciences complex mixtures 01 natural sciences chemistry.chemical_compound Bioremediation Environmental Chemistry Petroleum Pollution Microbial biodegradation Keystone species Waste Management and Disposal Groundwater 0105 earth and related environmental sciences 021110 strategic defence & security studies Functional ecology geography geography.geographical_feature_category Microbiota Pollution Hydrocarbons Biodegradation Environmental Petroleum Microbial population biology chemistry Environmental chemistry Environmental science |
| Zdroj: | Journal of hazardous materials. 420 |
| ISSN: | 1873-3336 |
| Popis: | The natural attenuation of petroleum hydrocarbons is inseparable from the action of microorganisms, while the degradation methods and ecological strategies of microorganisms in petroleum-contaminated aquifers are still under debate. In the present study, 16 S rRNA sequencing and quantitative real-time polymerase chain reaction were used to assess the potential microbial degradation of petroleum hydrocarbons, and the ecological strategy of microorganisms under petroleum stress was analyzed through a co-occurrence network. The results showed that the microbial community in sediments exhibit higher efficiency and stability and stronger ecological function than that in groundwater. Keystone species coordinated with the community to execute ecosystem processes and tended to choose a K-strategy to survive, with the aquifer sediment being the main site of petroleum hydrocarbon degradation. Under natural conditions, the presence of petroleum hydrocarbons at concentrations higher than 126 μg kg-1 and 5557 μg kg-1 was not conducive to the microbial degradation of polycyclic aromatic hydrocarbons and alkanes, respectively. These results can be used as a reference for an enhanced bioremediation of contaminated groundwater. Overall, these findings provide support to managers for developing environmental management strategies. |
| Databáze: | OpenAIRE |
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