TABLE 1.
Chemical and microbiological characteristics of samplesa
| Sample designationb | Type of sample | Water content (%) | Naphthalene conc (μg · cm3−1) | Acridine orange microscopic count of total bacteria [(±SD) · 109 · gdw−1] | Total no. of cultured heterotrophsc [(±SD) · 106 · gdw−1] | Total no. of cultured naphthalene-degrading bacteriad [(±SD) · 104 · gdw−1] |
|---|---|---|---|---|---|---|
| Seep | Sediment | 61.7 | 22.00 | 4.98 (±0.87) | 1.6 (±0.3) | 4.6 (±1.6) |
| Hillside | Soil | 36.3 | 0.80 | 3.37 (±0.10) | 1.8 (±0.5) | 3.2 (±0.7) |
| Adjacent | Sediment | 51.1 | 0.17 | 4.01 (±0.39) | 1.1 (±0.6) | Below detection |
| Upstream | Sediment | 61.3 | 0.70 | 5.23 (±0.46) | 0.54 (±0.25) | Below detection |
a
gdw, gram (dry weight) of cells.
b
See Materials and Methods for a description of sampling locations.
c
Grown on R2A medium.
d
Only large colonies (∼3 mm in diameter) that responded to naphthalene vapor were counted. See Materials and Methods for details.