. 2013 Jul 9;4:181. doi: 10.3389/fmicb.2013.00181

Table 2.

Relative abundances of bGDGTs and bGDGTs-derived proxies for cellulolytic enrichments and natural samples from GBS.

Relative abundance of bGDGTs, normalized to 100% for core bGDGTs and for P-bGDGTs															bGDGT proxies^a
	I		Ib		Ic		II		IIb		IIc		III		MBT		CBT		T_MBT/CBT (°C)		pH_CBT
Sample	Core	Polar	Core	Polar	Core	Polar	Core	Polar	Core	Polar	Core	Polar	Core	Polar	Core	Polar	Core	Polar	Core	Polar	Core	Polar
SEDIMENTS
Site A	56.5	21.5	17.9	24.6	9.0	14.3	9.4	16.4	2.6	2.7			4.6	20.5	0.83	0.60	0.51	0.14	30.9	22.8	7.4	8.4
Site B	50.5	34.3	16.3	15.7	4.3	13.3	16.8	23.3	6.3	0.3			5.7	13.1	0.71	0.63	0.47	0.56	25.1	20.4	7.5	7.3
Site C	72.8	39.1	10.4	12.0	2.6	10.7	8.6	18.0	3.0	8.6			2.7	11.5	0.86	0.62	0.78	0.44	29.4	20.7	6.7	7.6
Site D	46.6	47.4	18.4	17.9	5.8	15.6	17.2	2.2	5.3	11.0			6.8	5.8	0.71	0.81	0.43	0.24	25.3	32.2	7.6	8.1
Site E	72.3	68.1	14.2	9.8	10.5	7.6	1.7	8.6	0.2	2.2			1.2	3.7	0.97	0.86	0.71	0.81	35.7	29.1	6.9	6.6
ENRICHMENT SAMPLES
77AS	90.1	84.3					9.9	15.7
77AW	100.0	100.0
77CS	75.0	56.2	4.6				5.4	25.0	14.9					18.9	0.80	0.56	0.61		28.0	22.0	7.1	8.8
77CW	63.2	52.6					36.8	18.1						29.3
85AS	63.9	42.6					36.1	57.4
85AW	100.0	100.0
85CS	17.7	15.3	28.8	17.0	22.7	15.3	14.1	28.1	11.0	5.4	5.6	19.0			0.69	0.48	0.10	0.29	29.5	15.0	9.0	8.0
85CW	66.2	57.4					33.8	42.6

MBT = (I+Ib+Ic)/(I+Ib+ Ic+II + IIb+ IIc + III), in which IIIb and IIIc are all zero values and not included; CBT = −log[(Ib+IIb)/(I+II)]; T_MBT/CBT(°C) = (MBT−0.122–0.187^*CBT)/0.02; pH_CBT = (3.33-CBT)/0.38.

All equations are derived from Weijers et al. (2007a).