## 3 Results  
Initial and final values of both experiments are summarized in Table 3. Hydrocarbon concentrations are depicted in Figure 1.  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Variant** & **C\({}_{10}\)\(-\)C\({}_{40}\)** & **DHA** & **Respiration** & **FC [\%]** & **Fe 1** \\
**[g-kg\({}^{-1}\) dwt]** & **[mU\(\cdot\)kg\({}^{-1}\) dwt]** & **[U-kg\({}^{-1}\) dwt]** & **[kg\({}^{-1}\) dwt]** & **[kg\({}^{-1}\) dwt]** \\ \hline \multicolumn{6}{c}{Experiment A–_Mixed culture_ (455 days)} \\ Day 0 & 81.6 \(\pm\) 2.5 & 9.9 \(\pm\) 3.2 & 9.4 \(\pm\) 2.2 & 14.9 \(\pm\) 0.5 & NA \\ Day 455 & & & & & \\ AC (control) & 78.4 \(\pm\) 0.9 & 0.9 \(\pm\) 0.3 & 1.7 \(\pm\) 0.3 & 14.7 \(\pm\) 0.6 & NA \\ AA (bioaugmentation) & 86.2 \(\pm\) 3.4 & 6.4 \(\pm\) 0.8 *** & 2.5 \(\pm\) 0.8 * & 15.1 \(\pm\) 0.4 & NA \\ AS (biostimulation) & 87.8 \(\pm\) 3.3 & 2.4 \(\pm\) 1.1 ** & 2.9 \(\pm\) 0.7 *** & 14.3 \(\pm\) 0.7 & NA \\ AD (biostim. + bioaug.) & 78.1 \(\pm\) 3.1 & 10.1 \(\pm\) 1.8 *** & 4.3 \(\pm\) 0.4 *** & 15.1 \(\pm\) 2.9 & NA \\ \hline \multicolumn{6}{c}{Experiment B-_G, rubripertincta_ CWB2, _R. erythropolis_ S43 (45 days)} \\ Day 0 & \({}^{\dagger\dagger}\) 79.7 \(\pm\) 2.0c & 3.4 \(\pm\) 1.6a * & 11.7 \(\pm\) 0.9c ** & 13.5 \(\pm\) 0.4a & 197 \(\pm\) 6a \\ Day 45 & & & & & \\ BC (control) & 78.2 \(\pm\) 2.2 bc & 0.8 \(\pm\) 0.9a & \({}^{\dagger\dagger}\) 0.6 \(\pm\) 0.9a & \({}^{\dagger\dagger}\) 13.3 \(\pm\) 0.5a & 198 \(\pm\) 7a \\ BD (DFOB) & 60.3 \(\pm\) 0.7 de ** & \({}^{\dagger\dagger}\) 4.3 \(\pm\) 1.3a ** & \({}^{\Lambda}\) 0 \(\pm\) a & 13.0 \(\pm\) 0.6a & 223 \(\pm\) 32a \\ BG1 (Fe\({}^{2+}\)) & 54.2 \(\pm\) 4.6e ** & 6.7 \(\pm\) 4.0 ab * & 2.6 \(\pm\) 1.6a & 12.8 \(\pm\) 0.6a & 224 \(\pm\) 26a \\ BG2 (no Fe) & 66.4 \(\pm\) 7.5 ad ** & 3.7 \(\pm\) 3.5a & \({}^{\Lambda}\) 0 \(\pm\) a & 13.4 \(\pm\) 0.4a & 213 \(\pm\) 24a \\ BG3 (Fe\({}^{3+}\)) & 75.1 \(\pm\) 5.8 bc & \({}^{\dagger\dagger}\) 7.2 \(\pm\) 9.5 ab * & \({}^{\dagger\dagger}\) 0.4 \(\pm\) 0.2a & 13.1 \(\pm\) 0.9a & 221 \(\pm\) 15a * \\ BR1 (Fe\({}^{2+}\)) & 70.2 \(\pm\) 0.9 ab ** & \({}^{\dagger\dagger}\) 40.8 \(\pm\) 7.8c ** & 6.5 \(\pm\) 1.7b ** & \({}^{\dagger}\) 13.0 \(\pm\) 0.6a & 220 \(\pm\) 41 ab \\ BR2 (no Fe\({}^{2+}\)) & \({}^{\dagger\dagger\dagger}\) 67.0 \(\pm\) 3.6 ad ** & 17.0 \(\pm\) 9.8b ** & 12.0 \(\pm\) 4.0c ** & 13.5 \(\pm\) 0.4a & 253 \(\pm\) 18b * \\ BR3 (Fe\({}^{3+}\)) & 73.2 \(\pm\) 8.5 abc & 52.4 \(\pm\) 13.5c ** & 7.9 \(\pm\) 1.4b ** & 13.1 \(\pm\) 0.7a & 208 \(\pm\) 41a \\ \hline \multicolumn{6}{c}{Comparison of microorganisms considered as single factors} \\ Day 45 & & & & & \\ _G. rubripertinca_ CWB2 (BG1 to BG3) & 65.2 \(\pm\) 10.5 ** & 5.9 \(\pm\) 6.5 ** & 1.0 \(\pm\) 1.4 & 13.1 \(\pm\) 0.7 & 219 \(\pm\) 20 * \\ _R. erythropolis_ S43 (BR1 to BR3) & 70.2 \(\pm\) 5.9 ** & 36.7 \(\pm\) 18.1 *** & 8.8 \(\pm\) 3.5 *** & 13.2 \(\pm\) 0.6 & 227 \(\pm\) 36 \\ \hline \multicolumn{6}{c}{Normality: Shapiro-Wilks test (\(\dagger\) \(p\) \(<\) 0.1; ** \(p\) \(<\) 0.05; *** \(p\) \(<\) 0.01); Overall comparison: ANOVA or Kruskal–Wallis test (\({}^{\dagger}\)_p_ \(<\) 0.1; ** \(p\) \(<\) 0.05; *** \(p\) \(<\) 0.01). 1 Water extractable iron (presumably bioavailable, first step of sequential BCR extraction). DHA = Dehydrogenase activity. A no varibility in data (all values equal to zero)—variable omitted in all tests.} \\ \hline \hline \end{tabular}
\end{table}
Table 3: Initial and final values for soil parameters (average \(\pm\) std. deviation from four replications of each variant). Bold face indicates a significant change compared to the initial value, asterisks denote significance compared to control at the end of experiment. Lower-case letters denote homogenous groups according to the Fisher’s Least Significant Difference (LSD) test (\(\alpha\) = 0.05).  
Figure 1: Aliphatic hydrocarbon concentrations in both experiments. Brown colour indicates initial values, light-green colour indicates significant decrease compared to control ([PERSON]’s pairwise post-hoc tests, \(p\) \(<\) 0.05).