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Initial responses of influential microbial taxa to metal elements lead to alterations in the forest soil microbial community structure and function
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  • Xian Wu,
  • Hua Xing,
  • Xi-Hua Wang,
  • Jiarong Yang,
  • Junfang Chen,
  • Xiaolin Liu,
  • Dong Dai,
  • Minhua Zhang,
  • Qingsong Yang,
  • Shu Dong,
  • Yu Liu
Xian Wu

Corresponding Author:[email protected]

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Xi-Hua Wang
East China Normal University
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Jiarong Yang
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Junfang Chen
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Xiaolin Liu
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Dong Dai
East China Normal University
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Minhua Zhang
East China Normal University
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Qingsong Yang
East China Normal University
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Yu Liu
East China Normal University
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Abstract

As primary drivers of underlying microbial changes, soil metals have been extensively studied in agroecosystems. However, while their contributions to forest soil microbial processes are crucial for maintaining tree biodiversity, they remain poorly understood. Based on the analysis of 1287 soil samples collected from a 20 ha forest plot, we show that seven metal elements (Al, Ca, Cu, Fe, Mg, Mn, and Zn) shape microbial community structure and function by initially altering influential microbial taxa. Microbial α-diversity and community structure responded differently to these elements at low vs. high C:N ratios, pH, and water content. Moreover, these elements also affected microbial functional guilds (e.g., phosphorus and sulfur metabolism, ectomycorrhizae, plant pathogens, and wood saprotrophs) via sensitive microbial taxa. This study advances our capacity to predict belowground microbial processes by revealing the fundamental importance of metals in forest soils, with important implications for better conserving forest biodiversity under global climate change.