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Ecological Processes

Table 1 Population densities of ammonia-oxidizing microbes in biological soil crusts estimated by qPCR of amoA genes

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

 

ArchaealaamoA

BacterialbamoA

Province

Range

Average (±SD)

Range

Average (±SD)

Sonoran

2.8 × 103–5.5 × 106

0.75 ± 1.6 × 106

3.9 × 103–3.7 × 105

0.47 ± 1.0 × 105

Chihuahuan

1.5 × 103–6.7 × 106

1.1 ± 2.0 × 106

8.7 × 104–5.0 × 105

2.5 ± 1.9 × 105

Colorado Plateau

2.0 × 103–5.8 × 106

0.59 ± 1.8 × 106

9.2 × 104–5.9 × 105

3.4 ± 1.6 × 105

Great Basin

5.4 × 101–4.8 × 104

1.7 ± 2.3 × 104

2.2 × 104–5.0 × 106

1.1 ± 2.0 × 106

All deserts

5.4 × 101–6.7 × 106

0.69 ± 1.6 × 106

3.9 × 103–5.0 × 106

3.4 ± 8.4 × 105

  1. aIn descending order n = 12, 10, 11, 6, 39. bIn descending order n = 12, 8, 12, 6, 38. All qPCR data are for amoA gene copies per gram of crusted soil.
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