Spatial Distribution of PCB Dechlorinating Bacteria and Activities in Contaminated Soil

Table 2

Analyses of total bacteria, putative PCB dechlorinating and PCB degrading bacteria and the number of putative dechlorinating bacteria in soil samples. Sample Meb9 was not collected.

Location	Presence/absence of
	Bacteria	Dechlorinating bacteria	Aerobic PCB degraders	No. of dechlorinating bacteria; (16S copies·g soil^−1)
Meb1	+	−	−	—
Meb2	+	−	−	—
Meb3	+	+	+	<DL^a
Meb4	+	+	+	3⋅10^4±2.8⋅10^4
Meb5	+	+	+	<DL
Meb6	+	+	+	3⋅10^6±2.8⋅10^6
Meb7	+	+	+	4⋅10^5±2.3⋅10^5
Meb8	+	+	−	3⋅10^5±2.8⋅10^5
Meb10	+	−	+	—
Meb11	+	−	−	—
Meb12	+	−	−	—
Meb13	+	−	+	—
Meb14	+	+	+	<DL
Meb15	+	+	+	<DL
Meb16	+	-	+	—
Meb17	+	+	−	<DL
Meb18	+	+	−	3⋅10^3±2.8⋅10^3
Meb19	+	−	−	—
Meb20	+	−	−	—

Mean values and standard deviations ± are given (𝑛=3).
^aDL: detection limit ≥10² 16S copies/g wet soil.