Table 2.

Taxonomic classes (RefSeq) that are overrepresented in microbialites relative to the surrounding environment by ANOVA using STAMP.

Bacteria	p-value (corr)	Effect size	Fil: Avg Rfreq (%)	Filr: SD (%)	MB: Avg Rfreq. (%)	MB: SD (%)	Sed: Avg Rfreq. (%)	Sed: SD (%)
Acidobacteriia	1.96E-03	0.889	0.314	0.164	0.839	0.139	0	0
Acidobacteria (Unclassified)	8.34E-05	0.972	0.096	0.053	0.849	0.094	0	0
Alphaproteobacteria	4.52E-04	0.947	7.708	0.266	19.768	2.196	2.679	2.008
Chloroflexi (class)	9.30E-05	0.973	0.449	0.142	1.481	0.116	0	0
Deferribacteres (class)	1.13E-03	0.917	0.059	0.014	0.117	0.02	0	0
Deinococci	1.82E-03	0.892	0.335	0.131	0.613	0.081	0	0
Deltaproteobacteria	1.81E-04	0.961	2.151	0.933	7.85	0.448	0.398	0.563
Gemmatimonadetes	1.39E-03	0.904	0.208	0.16	0.797	0.114	0	0
Gloeobacteria	7.68E-05	0.972	0.056	0.038	0.36	0.03	0	0
Ktedonobacteria	1.49E-03	0.9	0.076	0.042	0.31	0.062	0	0
Solibacteres	1.16E-04	0.973	0.386	0.279	3.346	0.331	0	0
Thermomicrobia (class)	1.44E-03	0.905	0.058	0.03	0.481	0.111	0	0
Thermotogae (class)	5.03E-03	0.845	0.044	0.023	0.138	0.006	0.023	0.033

STAMP ANOVA tested significant differences between multiple groups (microbialite, sediments, and filters) using a post-hoc test (Tukey–Kramer at 0.95), an effect size (Eta-squared), a p-value (<0.01) and a multiple-test correction of Benjamini–Hochberg FDR. Results are for RefSeq classifications that significantly differed (p < 0.01) for microbialite over the surrounding environments (sediments and filters). Avg Rfreq, Average relative frequency; SD, Standard deviation; p-val corr, p-value ANOVA corrected; Unclass, Unclassified; MB, Microbialite; Sed, Sediment.

Avg Rfreq, Average relative frequency; SD, Standard deviation. P-val corr, p-value ANOVA corrected (By Benjamini–Hochberg FDR); Fil, Filter represents surrounding water; MB, Microbialite; Sed, Sediment.