Table 2.
Gene abundance levels in DNA extracts from root surfaces of the dominant plant species and the adjacent, nonvegetated sediment
| Sampling date | Wetland and site | Gene abundancea in: |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| Rhizosphere |
Sediment |
||||||||
| 16S rRNA |
amoA |
16S rRNA |
amoA |
||||||
| Bacteria (1010) | Crenarcheota (107) | Bacteria (107) | Archaea (107) | Bacteria (1010) | Crenarcheota (107) | Bacteria (107) | Archaea (107) | ||
| January 2007 | Empordà | ||||||||
| Basses d'en Coll | 73.6 ± 13.2 | 56.1 ± 4.2 | 29.6 ± 9.7 | 166.1 ± 36.7 | 0.9 ± 0.4 | 1.9 ± 0.5 | 0.5 ± 0.2 | 9.2 ± 3.3 | |
| Ter Vell | 7.5 ± 2.6 | 14.3 ± 7.9 | 3.1 ± 0.8 | 41.8 ± 24.2 | 0.5 ± 0.0 | 3.7 ± 2.0 | 0.5 ± 0.1 | 10.8 ± 5.9 | |
| Fra Ramon | 28.2 ± 2.2 | 10.7 ± 1.9 | 8.6 ± 0.6 | 26.5 ± 4.9 | 0.3 ± 0.1 | 1.9 ± 0.5 | 0.3 ± 0.1 | 5.8 ± 1.3 | |
| Doñana | |||||||||
| Laguna Dulce | 0.7 (NA) | 0.7 (NA) | 1.0 (NA) | 1.0 (NA) | 0.7 ± 0.2 | 0.6 ± 0.1 | 0.3 ± 0.0 | 1.5 ± 0.1 | |
| Santa Olalla | 3.0 ± 1.8 | 0.9 ± 0.4 | 1.2 ± 0.4 | 1.2 ± 0.6 | 0.8 ± 0.7 | 0.2 ± 0.2 | 0.4 ± 0.3 | 1.9 ± 1.6 | |
| Lucio del Cangrejo | 3.3 ± 1.7 | 2.4 ± 1.2 | 1.2 ± 0.5 | 3.6 ± 1.6 | 2.9 ± 1.4 | 4.9 ± 2.9 | 1.0 ± 0.3 | 8.9 ± 4.6 | |
| May 2007 | Empordà | ||||||||
| Basses d'en Coll | 17.8 ± 4.6 | 20.0 ± 0.6 | 10.2 ± 0.9 | 35.1 ± 5.1 | 0.5 ± 0.2 | 0.5 ± 0.2 | 0.2 ± 0.1 | 1.4 ± 0.4 | |
| Ter Vell | 32.8 ± 4.8 | 23.3 ± 11.2 | 17.4 ± 3.0 | 52.5 ± 21.9 | 2.1 ± 0.8 | 2.0 ± 0.4 | 0.7 ± 0.1 | 5.1 ± 0.9 | |
| Túries | 5.5 ± 2.8 | 12.9 ± 5.5 | 9.8 ± 5.1 | 28.0 ± 11.8 | 2.4 ± 0.8 | 5.8 ± 0.3 | 1.2 ± 0.4 | 12.1 ± 2.0 | |
| Fra Ramon | 40.7 ± 13.4 | 36.8 ± 3.6 | 14.5 ± 5.2 | 37.8 ± 2.0 | 3.4 ± 1.7 | 8.9 ± 2.7 | 2.3 ± 1.1 | 23.8 ± 5.7 | |
| Doñana | |||||||||
| Laguna Dulce | 3.8 ± 0.8 | 4.0 ± 1.2 | 1.6 ± 0.5 | 1.8 ± 0.4 | 1.6 ± 1.0 | 4.8 ± 1.0 | 1.3 ± 0.7 | 12.6 ± 2.6 | |
| Santa Olalla | 36.3 ± 6.0 | 18.6 ± 1.5 | 14.0 ± 1.2 | 14.9 ± 1.8 | 7.3 ± 1.6 | 24.0 ± 5.0 | 3.8 ± 1.0 | 33.1 ± 2.4 | |
| Lucio del Cangrejo | 13.6 ± 5.5 | 13.0 ± 7.0 | 7.6 ± 3.5 | 28.3 ± 15.8 | 0.3 ± 0.1 | 1.5 ± 0.2 | 0.3 ± 0.0 | 4.3 ± 1.1 | |
| Algaida | 95.9 ± 30.7 | 43.6 ± 6.5 | 25.8 ± 6.6 | 33.6 ± 3.7 | 2.2 ± 1.2 | 5.8 ± 2.0 | 1.1 ± 0.6 | 17.0 ± 4.2 | |
a
Values are means ± standard errors of the gene abundance levels (in copies/g [dry weight]) obtained from three independent DNA extracts from the root surfaces of the dominant plant species and the adjacent, nonvegetated sediment. Note the differences in the log factors between columns. NA, the standard error was not calculated due to the lack of replicates for this sample.