Fig. 3

Enrichment ratio of the cultured species and growth states of Marinilabiliales during the enrichment culturing. a The enrichment ratio or enrichment degree of the cultured species. The enrichment ratio indicates the abundance of a cultured species in the corresponding period of enrichment culturing relative to its original abundance. A ratio > 1 means that the species was enriched when it was isolated. In contrast, a ratio = < 1 means that the species was not enriched when it was isolated. b Dormant and active bacteria of Marinilabiliales during the enrichment culture. Different levels of taxonomic composition of original sediment and enrichment treatments were assessed according to the log10 16S rRNA:16S rRNA gene ratio for the microbial order Marinilabiliales. The dotted line represents a 16S rRNA:16S rRNA gene ratio of 1. Taxa with ratios higher than 1 are considered active, and taxa with ratios lower than 1 are considered dormant. The numbers 0 to 4 (each box from bottom to top in one group) indicate the 0, 5, 12, 21, and 30 days of enrichment culturing. Boxes represent quartiles, and the solid line is the median value (n = 3,**p < 0.01, *p < 0.05).