TABLE 4.
Contributions of three ecotypes to total AAP bacterial communities in the Delaware estuarya
| Regionb (nc) | % of bacteria (±SE) containing pufM
|
|||
|---|---|---|---|---|
| Rhodobacter-like | Rhodoferax-like | Marine group | Sum | |
| Lower bay (7) | 3.1 (0.15) | 0.0049 (0.006) | 8.8 (0.21) | 12.0 (4.6) |
| Midbay (15) | 3.9 (0.11) | 0.044 (0.25) | 2.0 (0.13) | 6.0 (1.7) |
| Turb. max. (9) | 2.8 (0.20) | 0.19 (0.037) | 0.017 (0.0018) | 3.1 (1.2) |
| Urban river (18) | 1.9 (0.06) | 1.5 (0.11) | 0.0047 (0.0067) | 3.5 (0.72) |
| Upper river (6) | 2.8 (0.031) | 5.0 (0.058) | 0.00010 (0.000014) | 7.8 (2.6) |
| Entire estuary (55) | 2.9 (0.55) | 1.1 (0.79) | 1.7 (2.9) | 5.7 (0.90) |
a
The Rhodobacter-like, Rhodoferax-like, and marine group (gammaproteobacterial) pufM genes were compared to the total AAP bacterial community by normalizing to total pufM abundance (36). “Sum” is the total of the three percentages.
b
Regions were defined as in reference 37 by distance from the mouth of the bay: lower bay (0 to 25 km), Midbay (25 to 70 km), turbidity maximum (Turb. max.) (70 to 115 km), urban river (115 to 175 km), or upper river (175 to 215 km).
c
n, number of samples in each region from five cruises (August, October, and November 2002, July 2004, and March 2005).