TABLE 5.
Distribution of cyanobacterium 16S rRNA gene sequence clusters in biological soil crusts
| 16S rRNA gene clustera | % of sequences in cluster for crust source
|
|||
|---|---|---|---|---|
| Canyonlands, poorly developed | Canyonlands, mature | Jornada, poorly developed | Jornada, mature | |
| M. vaginatus | 92 | 53 | 80 | 44 |
| M. steenstrupii | 3 | 17 | 18 | 37 |
| M. sociatus | 3 | 3 | 2 | 9 |
| P. murrayii | 4 | 3 | 0 | 0 |
| Nostoc/Scytonema | 0 | 4 | 0 | 5 |
| Crust A | 0 | 14 | 0 | 0 |
| Chroococcidiopsis | 1 | 0 | 0 | 5 |
| Leptolyngba | 0 | 4 | 0 | 0 |
| Other | 0 | 1 | 0 | 0 |
| Total (%) | 103 | 99 | 100 | 100 |
| Total (n) | 73 | 70 | 51 | 43 |
a
Sequences were assigned to clusters based on phylogenetic analysis as illustrated in Fig. 4 and inspection of sequence similarities.