TABLE 2.

Methanotrophic community of different soil samples, based on detection of the pmoA gene^a

Sample	pH	PmoA					PmoA or AmoA (unknown)b	AmoA (ammonia oxidizer)
		Methylocaldum	Methylosinus	Methylocystis	USC α	USC γ
E 20	7.6	+	+					+
E 33a	6.6		+	+	+			+
E 33b	5.1		+	+	+		A	+
E L4	5.7		+		+
E L4P	5.9		+		+			+
E L5	5.2		+		+		A
E L6	6.2		+		+	+
E W7	7.2	+	+	+	+			+
E 5FB	7.5		+			+
E 5FL	6.2		+			+		+
E 26F	4.9		+		+
E 26W	5.9		+	+	+			+
E 26A	6.6		+				A	+
E 56A	6.9	+	+				A	+
E 56W	5.6		+	+	+
E 56F	4.6		+	+	+		B
GE BWN	5.8
GE BF	6.8
WO DFH	5.6				+
VA DFT	4.4				+
VA DWT	6.8			+		+
MF	4.0				+
BB NH	4.6
BB NNW	4.3				+
BB WAS	5.6							+
G 15F	7.7	+		+	+
G 15W	7.3			+
G 13FH	7.1				+	+
G 44W	7.8	+
G 44F	8.0			+				+
W B5FH	6.3				+	+
W B5FP	6.9	+			+
W Re4F	6.1	+		+	+
W Re1F	7.6	+		+		+
W Re3W	7.8	+				+
Samples from      July 2002
E 5FB	6.5				+	+	C
MF	4.3				+
G 15F	7.9		+		+	+
G 13FH	6.8				+	+	B, C	+
G 44F	7.9		+	+	+	+
G 44W	8.0		+		+	+

^aSee Table 1 for site descriptions.

^bA, B, and C indicate the affiliations of the detected sequences with different unknown clusters.