Table 2: Oligonucleotide probes used in this study.

Probe	Sequence (5’ – 3’)	Target	Rank	Formamide %	References
ARC915	GTGCTCCCCCGCCAATTCCT	Most Archaea	DOMAIN	35	[23]
MG1200b	CRGATAATTCGGGGCATGCTG	Most Methanomicrobiales	ORDER	20	[24]
MX825	TCGCACCGTGGCCGACACCTAGC	Methanosaetaceae	FAMILY	50	[23]
MS1414	CTCACCCATACCTCACTCGGG	Methanosarcinaceae	FAMILY	50
MS821	CGCCATGCCTGACACCTAGCGAGC	Some Methanosarcina	GENUS	40
MC1109	GCAACATAGGGCACGGGTCT	Methanococcales	ORDER	45
MB1175	TACCGTCGTCCACTCCTTCCTC	Most Methanobacteriales	ORDER	45
MB310	CTTGTCTCAGGTTCCATCTCCG	Methanobacteriales	ORDER	35
MX1361	ACGTATTCACCGCGTTCTGT	Methanosaetaceae	FAMILY	25	[24]