Table 2.

Differentially abundant¹ bacterial co-abundance groups (BCG)² and ungrouped amplicon sequence variants (ASV) across transitions³

BCG	W 4	Taxonomic lineage 5
BCG_76	264	p__Firmicutes; c__Clostridia; o__Lachnospirales; f__Lachnospiraceae p__Firmicutes; c__Clostridia
BCG_85	272	p__Firmicutes; c__Clostridia; o__Christensenellales; f__Christensenellaceae; g__Christensenellaceae _R-7_group p__Bacteroidota; c__Bacteroidia; o__Bacteroidales; f__Rikenellaceae; g__Rikenellaceae_RC9_gut_group; s__uncultured_Rikenella
ASV_85	277	p__Firmicutes; c__Bacilli

¹Differential abundance was analyzed by Analysis of Composition of Microbes (ANCOM) in Qiime 2 (v.2020.8)

²The ASV were grouped into BCG using Sparce Cooccurrence Network Investigation for Compositional Data in Qiime 2 (v.2020.8)

³Transitions from cool-season to warm-season grass versus from warm-season to cool-season grass

⁴For ANCOM, H_0(ij): mean(log[x_i/x_j) = mean(log[y_i/y_j). The W value indicates the number of times H_0(ij) is rejected for the ith species

⁵Taxonomic assignment was conducted using the most recent SILVA database (SSU 138)