<p>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, <i>Proteobacteria</i> 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/m<sup>3</sup>. Integrated microbial monitoring and environmental management throughout excavation, cleaning, and storage are essential for long-term preservation of ancient ivory remains.</p>

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Multi-omics insights into microbial dynamics at the soil-ivory interface of ancient ivory from Sanxingdui

  • Zhiwei Zhou,
  • Guangjie Lao,
  • Likun Wei,
  • Shan Lv,
  • Wei Wu,
  • Jin Dai,
  • Dongmei Luo,
  • Rao Wu,
  • Chong Wang,
  • Jiancheng Liu,
  • Zhenbin Xie,
  • András Dinnyés,
  • Xuemei Tan,
  • Haibing Yuan,
  • Qun Sun

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.