Table 2.

Archaeal data on Methanothermobacters.

	Opt. Temp.		Chemical addition	Specific Growth rate	Doubling time	Size
Methanothermobacter	°C	Opt. pH	g/l	/h	h	µm x µm	Reference
Crinale	65	6.9	0.025 NaCl	3.6	0.193	0.3 x 5	[28]
Defluvii	60	7	0.8–20 NaCl 0.025 Na2S	0.462	1.5	0.42 x 6	[30]
Thermoflexum	55	8.1	30 NaCl 0.05 Na2S	0.198	3.5	0.4 x 20	[29,30]
Wolfeii	60	7.25	0.002 Na2WO4 10 NaCl	0.185	3.75	0.4 x 2.5	[33]
Tenebrarum	70	7.3	2.5 NaCl	0.058	12	0.5 x 10.5	[31]
Marburgensis	65	7.2	0.5 NaCl	0.1	0.288	0.6 x 6	[34,65]
Thermoautotrophicus	67	7.4		0.231	3	0.6 x 7	[43]
Thermophilus	57	7.6	15 NaCl			0.36 x 6.5	[35]

Where values were missing from literature, highlighted results (bold, italic and underlined) are calculated using the formula for specific growth rate of microbes: μ = ln(N₂/N₁)/(t₂ − t₁); where μ is the specific growth rate, and N₁ and N₂ are the biomass at time 1 (t₁) and time 2 (t₂), respectively.