TABLE 1

Chao1 and Shannon-Weaver diversity indices for 16S rRNA amplicon sequences from sand filter and MPN samplesa

SampleChao1 index (SD)Shannon-Weaver index (SD)
Day 14, top, DNA140 (4.1)4.0 (0.0)
Day 14, depth, DNA137 (4.4)3.9 (0.2)
Day 57, top, DNA137 (1.3)4.1 (0.0)
Day 57, depth, DNA177 (12)4.2 (0.1)
Day 85, top, DNA156 (0.3)4.0 (0.2)
Day 85, depth, DNA190 (17)4.5 (0.2)
Day 85, top, cDNA80 (18)0.7 (0.0)
Day 85, depth, cDNA179 (5.4)5.3 (0.0)
Day 85, top, MPN99 (1.7)3.3 (0.1)
Day 85, depth, MPN39 (2.3)2.7 (0.3)
  • a The table shows average values for duplicate samples (triplicate samples for MPN) obtained from each sample type, and standard deviations are shown in parentheses.