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Oil contamination drives the transformation of microbial communities and metabolic pathways involved in Phosphorous-cycling in coastal soil.
- Source :
- Journal of Soils & Sediments: Protection, Risk Assessment, & Remediation; Jul2024, Vol. 24 Issue 7, p2638-2651, 14p
- Publication Year :
- 2024
-
Abstract
- Purpose: Soil Phosphorous (P) availability is critical for many important ecological processes and oil-contaminated soil remediation. Despites a few studies confirmed directly effects of crude oil exposure on soil Phosphorus-cycling (P-cycling), how soil microbes and functional genes affiliated with P-cycling respond to crude oil remains poorly understood. Methods: Here, metagenomics was implemented to analyze variations in the microbial community structure and potential functions associated with P transformation in the coastal soil contaminated by crude oil. Results: Results showed a dramatic scarcity of P in the contaminated soil. Microbial inorganic P solubilization was governed by genes gcd and ppx in CK soil. In contrast, genes encoding C-P lyase (phnGHIJKLN) and alkaline phosphatase (phoA) displayed significantly greater abundances in the contaminated soils. Taxa annotation revealed that oil contamination altered the structure of the P-cycling microbial community with a bias towards those with oligotrophic characteristics. Specifically, the oil-contaminated soils were characterized by a stronger contribution of Proteobacteria, Ascomycota and Firmicutes. Overall, the strategy for acquiring P in the CK is inorganic P solubilization, while it converted to organic P mineralization under petroleum contamination. Soil N/P ratio played a key role in affecting P-cycling functional genes. Conclusion: Our results highlighted that oil contamination with unbalanced N/P ratio greatly altered the microbial strategy for obtaining available P (AP) in soil. A better understanding of P-cycling mechanism exposed to oil contamination and further scientifically regulating it may set the stage for in-depth improvement for current bioremediation practices. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14390108
- Volume :
- 24
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Journal of Soils & Sediments: Protection, Risk Assessment, & Remediation
- Publication Type :
- Academic Journal
- Accession number :
- 178526734
- Full Text :
- https://doi.org/10.1007/s11368-024-03853-3