Unraveling negative biotic interactions determining soil microbial community assembly and functioning - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles The International Society of Microbiologial Ecology Journal Year : 2022

Unraveling negative biotic interactions determining soil microbial community assembly and functioning

Aymé Spor
Julie Aubert
David Bru
  • Function : Author
  • PersonId : 1144376
  • IdHAL : david-bru
Sarah Ouadah

Abstract

Abstract Microbial communities play important roles in all ecosystems and yet a comprehensive understanding of the ecological processes governing the assembly of these communities is missing. To address the role of biotic interactions between microorganisms in assembly and for functioning of the soil microbiota, we used a top-down manipulation approach based on the removal of various populations in a natural soil microbial community. We hypothesized that removal of certain microbial groups will strongly affect the relative fitness of many others, therefore unraveling the contribution of biotic interactions in shaping the soil microbiome. Here we show that 39% of the dominant bacterial taxa across treatments were subjected to competitive interactions during soil recolonization, highlighting the importance of biotic interactions in the assembly of microbial communities in soil. Moreover, our approach allowed the identification of microbial community assembly rule as exemplified by the competitive exclusion between members of Bacillales and Proteobacteriales. Modified biotic interactions resulted in greater changes in activities related to N- than to C-cycling. Our approach can provide a new and promising avenue to study microbial interactions in complex ecosystems as well as the links between microbial community composition and ecosystem function.
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Dates and versions

hal-03604836 , version 1 (08-03-2023)

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Sana Romdhane, Aymé Spor, Julie Aubert, David Bru, Marie-Christine Breuil, et al.. Unraveling negative biotic interactions determining soil microbial community assembly and functioning. The International Society of Microbiologial Ecology Journal, 2022, 16 (1), pp.296-306. ⟨10.1038/s41396-021-01076-9⟩. ⟨hal-03604836⟩
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