Multi-omics insights into microbial dynamics at the soil-ivory interface of ancient ivory from Sanxingdui
摘要
Ancient ivory remains from the Sanxingdui sacrificial pits are highly susceptible to microbial colonization due to their porous structure and prolonged burial in humid environments. Using a multi-omics approach, we characterized microbial communities across three operational stages: early-stage interface soils in contact with ivory, residual soils during surface cleaning, and ivory remains after temporary storage. Early-stage interface soils showed substantial intersite heterogeneity associated with differences in soil physicochemical properties. During excavation and cleaning, Proteobacteria relative abundance increased from 54.14 to 94.04%, indicating strong environmental filtering by excavation procedures and human intervention. Source tracking revealed that 42.89% of fungi and 33.59% of bacteria on stored ivory originated from residual soil, accompanied by increased sulfur metabolism, potentially contributing to biodeterioration risk. Air filtration reduced airborne fungal counts from 2880 to 459 CFU/m3. Integrated microbial monitoring and environmental management throughout excavation, cleaning, and storage are essential for long-term preservation of ancient ivory remains.