Fig. 1

Predation assays for potential prey organisms. a A total of 281 organisms were selected to test predation by two type strains of Bradymonadales. The phylogenetic tree was analyzed for the tested organisms. Red dots on the phylogenetic tree indicate that an organism could be preyed upon by either Bradymonas sediminis FA350^T or Lujinxingia litoralis B210^T. Green dots indicate that the organism could not be preyed upon by either tested predator. Detailed information about the organisms on the tree is shown in Table S1. b The predation phenotype of Bradymonas sediminis FA350^T or Lujinxingia litoralis B210^T on prey. The numbers 1 to 3 indicate pure culture of different prey, mixed culture of Bradymonas sediminis FA350^T and prey, and mixed culture of Lujinxingia litoralis B210^T and prey, respectively. c The percentage of organisms that could be preyed upon is shown in the bar chart