Considering the Specific Impact of Harsh Conditions and Oil Weathering on Diversity, Adaptation, and Activity of Hydrocarbon-Degrading Bacteria in Strategies of Bioremediation of Harsh Oily-Polluted Soils

Table 6

Statistical analysis of the significance of hydrocarbon removal efficiency of HDB8, HDB9, and HDB18, with different nitrogen sources and C/N ratios.

	Nitrogen sources	value at 95% confidence	C : N ratios	value at 95% confidence
HDB8
Total removal (average)
LMW hydrocarbons
MMW hydrocarbons
HMW hydrocarbons
HDB9
Total removal (average)
LMW hydrocarbons
MMW hydrocarbons
HMW hydrocarbons	NS
HDB18
Total removal (average)
LMW hydrocarbons
MMW hydrocarbons
HMW hydrocarbons

NS: not significant. . significant. highly significant.
LMW: low molecular weight; MMW: medium molecular weight; HMW: high molecular weight.