Sewage sludge fertilization affects microbial community structure and its resistome in agricultural soils.

Autor: Serwecińska L; European Regional Centre for Ecohydrology of the Polish Academy of Sciences, Tylna 3, 90‑364, Lodz, Poland. l.serwecinska@erce.unesco.lodz.pl., Font-Nájera A; European Regional Centre for Ecohydrology of the Polish Academy of Sciences, Tylna 3, 90‑364, Lodz, Poland., Strapagiel D; Biobank Lab, Department of Oncobiology and Epigenetics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 139, 90-235, Lodz, Poland., Lach J; Biobank Lab, Department of Oncobiology and Epigenetics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 139, 90-235, Lodz, Poland., Tołoczko W; Department of Physical Geography, Faculty of Geographical Sciences, University of Lodz, Narutowicza 88, 90-139, Lodz, Poland., Bołdak M; Department of Agriculture and Environmental Chemistry, University of Agriculture in Krakow, Mickiewicza 21, 31-120, Kraków, Poland., Urbaniak M; UNESCO Chair on Ecohydrology and Applied Ecology, Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90‑237, Lodz, Poland.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2024 Sep 09; Vol. 14 (1), pp. 21034. Date of Electronic Publication: 2024 Sep 09.
DOI: 10.1038/s41598-024-71656-0
Abstrakt: Global sewage sludge production is rapidly increasing, and its safe disposal is becoming an increasingly serious issue. One of the main methods of municipal sewage sludge management is based on its agricultural use. The wastewater and sewage sludge contain numerous antibiotic resistance genes (ARGs), and its microbiome differs significantly from the soil microbial community. The aim of the study was to assess the changes occurring in the soil microbial community and resistome after the addition of sewage sludge from municipal wastewater treatment plant (WWTP) in central Poland, from which the sludge is used for fertilizing agricultural soils on a regular basis. This study used a high-throughput shotgun metagenomics approach to compare the microbial communities and ARGs present in two soils fertilized with sewage sludge. The two soils represented different land uses and different physicochemical and granulometric properties. Both soils were characterized by a similar taxonomic composition of the bacterial community, despite dissimilarities between soils properties. Five phyla predominated, viz. Planctomycetes, Actinobacteria, Proteobacteria, Chloroflexi and Firmicutes, and they were present in comparable proportions in both soils. Network analysis revealed that the application of sewage sludge resulted in substantial qualitative and quantitative changes in bacterial taxonomic profile, with most abundant phyla being considerably depleted and replaced by Proteobacteria and Spirochaetes. In addition, the ratio of oligotrophic to copiotrophic bacteria substantially decreased in both amended soils. Furthermore, fertilized soils demonstrated greater diversity and richness of ARGs compared to control soils. The increased abundance concerned mainly genes of resistance to antibiotics most commonly used in human and animal medicine. The level of heavy metals in sewage sludge was low and did not exceed the standards permitted in Poland for sludge used in agriculture, and their level in fertilized soils was still inconsiderable.
(© 2024. The Author(s).)
Databáze: MEDLINE
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