Fig. 1.
Percent PAH degradation in the PAH amended soil without bioaugmentation.
Fig. 2.
Percent PAH degradation in the PAH amended and bioaugmented soil.
Fig. 3.
Comparison of the percentage of clones at the phylum level between the unamended control, PAH amended, bioaugmented microcosms and the soil enrichment on day 22.
* Indicates those taxonomic groups that are significantly different at p < 0.01 between the control and the PAH amended microcosms and ** indicates those taxonomic groups that are significantly different between the PAH amended and PAH amended and bioaugmented microcosms.
Table I
Putative PAH degrading genera identified in the soil enrichment and soil microcosms.
| Phylum | Soil Enrichment – Day 22 | PAH Amended – Day 8 | Augmented – Day 8 | PAH Amended – Day 22 | Bioaugmented – Day 22 |
|---|---|---|---|---|---|
| Bacteriodetes | Sediminibacterium | Flavobacterium | |||
| Arenibacter | |||||
| Alphaproteobacteria | Azospirillum | ||||
| Bosea | Bosea | ||||
| Brevundimonas | Brevundimonas | ||||
| Devosia | |||||
| Hyphomicrobium | |||||
| Phyllobacterium | |||||
| Sphingomonas | Sphingomonas | Sphingomonas | |||
| Sphingopyxis | |||||
| Betaproteobacteria | Achromobacter | Achromobacter | |||
| Bordetella | Bordetella | ||||
| Pusillimonas | Pusillimonas | ||||
| Gammaproteobacteria | Pseudomonas | Pseudomonas | |||
| Pseudoxanthomonas | Pseudoxanthomonas | Pseudoxanthomonas | |||
| Steroidobacter | Steroidobacter | ||||
| Firmicutes | Bacillus | Bacillus | Bacillus | Bacillus | |
| Paenibacillus | |||||
| Candidatus Saccharibacteria | Saccharibacteria genera incertae sedis | Saccharibacteria genera incertae sedis | Saccharibacteria genera incertae sedis | Saccharibacteria genera incertae sedis |
Fig. 4.
Comparison of the percentage of Bacteroidetes clones at the family level (and genus level for Ohtaekwangia) between the unamended control, PAH amended and PAH amended and bioaugmented soils on day 22.