Changes in the Bacterial Community Composition of Cultivated Soil after Digging up Operations for Laying a Pipeline

Maria Grazia Bonomo, Laura Scrano (), Stefania Mirela Mang, Barbara Emanuela Scalese, Sabino Aurelio Bufo, Lee-Ann Modley, Euro Buongarzone and Giovanni Salzano
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Maria Grazia Bonomo: Department of Sciences, The University of Basilicata, 85100 Potenza, Italy
Laura Scrano: Department of European Cultures, The University of Basilicata, 75010 Matera, Italy
Stefania Mirela Mang: School of Agricultural, Forestry, Food and Environmental Sciences, The University of Basilicata, 85100 Potenza, Italy
Barbara Emanuela Scalese: Department of Sciences, The University of Basilicata, 85100 Potenza, Italy
Sabino Aurelio Bufo: Department of Sciences, The University of Basilicata, 85100 Potenza, Italy
Lee-Ann Modley: Department of Geography, Environmental Management and Energy Studies, The University of Johannesburg, Johannesburg P.O. Box 524, South Africa
Euro Buongarzone: SAIPEM Spa, 61032 Fano, Italy
Giovanni Salzano: Department of Sciences, The University of Basilicata, 85100 Potenza, Italy

Agriculture, 2023, vol. 13, issue 6, 1-14

Abstract: Our study aimed to evaluate the impact of the pipeline installation on the bacterial composition in cultivated soil by metagenomic analyses performed before the excavation and in the following three years. Differential abundance analysis was obtained using DESeq2 from the GAIA pipeline to verify the bacteriological diversity in soils collected after the reference year (2013). Soil samples presented a different distribution of taxa, especially in 2014, in which a further allocation at the phylum and family levels was observed compared to the previous year (2013). The phyla Bacteroidetes and Firmicutes increased significantly, while the phylum Actinobacteria, most abundant in 2013, showed reduced abundance; moreover, Chloroflexi and Planctomycetes decreased considerably, and Verrucomicrobia was absent. The significant differences in the taxonomic composition and structure of the soil microbial community were due to critical stress conditions following the soil excavations. The bacterial communities were capable of profound physiological and genetic changes, implementing different mechanisms for survival and adaptation to an environment with changed conditions. The implication of changes in microbial diversity before and after the mechanical insult of soil has been determined.

Keywords: soil; bacterial composition changes; pipeline installation; metagenomic approach (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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