Temporal dynamics of the soil bacterial community following Bacillus invasion

• Published in: iScience 2022-05, Vol.25 (5), p.104185-104185, Article 104185
• Main Authors: Mawarda, Panji Cahya, Lakke, Sarah L., Dirk van Elsas, Jan, Salles, Joana Falcao
• Format: Article
• Language: English
• Subjects: Biogeochemistry; Microbiology; Soil biology; Soil science
• ISSN: 2589-0042; 2589-0042
• DOI: 10.1016/j.isci.2022.104185

Microbial inoculants are constantly introduced into the soil as the deployment of sustainable agricultural practices increases. These introductions might induce soil native communities’ dynamics, influencing their assembly process. We followed the impact and successional trajectories of native soil communities of different diversity levels to the invasion by Bacillus mycoides M2E15 (BM) and B. pumilus ECOB02 (BP). Whereas the impact was more substantial when the invader survived (BM), the transient presence of BP also exerted tangible effects on soil bacterial diversity. Community assembly analyses revealed that deterministic processes primarily drove community turnover. This selection acted stronger in highly diverse communities invaded by BM than in those invaded by BP. We showed that resident bacterial communities exhibit patterns of secondary succession following invasions, even if the latter are unsuccessful. Furthermore, the intensification of biotic interactions in more diverse communities might strengthen the deterministic selection upon invasion in communities with higher diversity. [Display omitted] •Microbial invaders altered soil bacterial diversity regardless of their survival•The impact was more pronounced when the invader was established•Deterministic selection primarily drove community turnover following invasion•The dynamic of invaded community showed pattern of secondary succession Soil science; Biogeochemistry; Microbiology; Soil biology