Frontiers in Microbiology, Journal Year: 2025, Volume and Issue: 16

Published: April 14, 2025

The mining industry in China plays a pivotal role economic development but also leads to severe environmental issues, particularly heavy metal pollution soils. Heavy significantly impacts soil microbial communities due its persistence and long-term residual effects. We assessed changes diversity, community structure, assembly mechanisms selenium-impacted This study investigates the of selenium (Se) other metals on selenium-rich areas using full-length 16S rRNA gene sequencing. Our results showed that Se contamination altered composition, favoring metal-tolerant phyla such as Proteobacteria, Actinobacteriota Firmicutes, while reducing abundance sensitive groups like Acidobacteriota Chloroflexi. Microbial diversity decreased concentrations increased. Mantel test analysis revealed total potassium (TK), organic carbon, nitrogen, several metals, including zinc, niobium, titanium (Ti), manganese, rubidium, barium, potassium, cobalt, gallium (Ga), Se, chromium (Cr), vanadium, copper were positively correlated with composition across all samples. Random forest TK multiple elements [Cr, Ti, nickel (Ni), Ga Se] most important predictors bacterial emphasizing shaping communities. Co-occurrence network reduced complexity stability, high Se-contaminated soils exhibiting fragmented networks. Community was primarily driven by drift control soils, whereas dispersal limitation became more prominent toxicity. These findings highlight ecological consequences offer valuable insights for effective management remediation strategies.

Language: Английский