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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.