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Table 2 Relative densities for ammonia-oxidizing microbial communities in biological soil crusts ( amoA or 16S genes)

From: Ammonia-oxidizing archaea and bacteria are structured by geography in biological soil crusts across North American arid lands

  Ratio of archaeal to bacterialaamoA Ratio of archaealbamoA to archaeal 16Sc
Province Range Average (±SD) d Range Average (±SD) d
Sonoran 0.073–257.995 54.733 ± 83.924 5.0 × 10-5–1.0 × 10-1 3.9 ± 6.8 × 10-2
Chihuahuan 0.020–15.844 3.459 ± 5.165 6.9 × 10-4–2.6 × 10-1 6.8 ± 9.9 × 10-2
Colorado Plateau 0.003–12.664 1.279 ± 3.794 2.6 × 10-5–7.4 × 10-1 7.4 ± 23.2 × 10-2
Great Basin 0.003–0.009 0.006 ± 0.003 9.9 × 10-6–7.0 × 10-4 2.5 ± 3.9 × 10-4
All deserts 0.003–257.995 19.510 ± 53.405 9.9 × 10-6–7.4 × 10-1 5.3 ± 14.8 × 10-2
  1. aIn descending order n = 11, 8, 11, 3, 33. bIn descending order n = 9, 6, 10, 3, 28. cDeterminations for general archaeal 16S rRNA gene copies per gram from Soule et al.2009. dAverage of all ratios for the designated province. All data here are for qPCR determinations of amoA or 16S genes as copies per gram of crusted soil.