TABLE 5.

Comparison of mcrA community profiles across three environmental surveys in the Guaymas Basin

Characteristic (unit)	Everest Mound, Alvin dive 3205 (Dhillon et al. [10])	Biddle et al. (12)			Everest Mound, Alvin dive 3204 (this study)
		Mat Mound, Alvin dive 4483	Megamat, Alvin Dive 4486	UNC Mat, Alvin Dive 4489
Location	Lat 27.0148, long −111.4122	Lat 27.0065, long −111.4093	Lat 27.0077, long −111.4085	Lat 27.0074, long −111.4088	Lat 27.0149, long −111.4105
Sediment depth (cmbsf)	0–15	8–10	6–8	8–14	0–10
Temp (°C)	3–94	15–20	30–35	60–95	∼2–54
Sulfate concn (mM)	0–19	∼8–25	∼24–28	∼22–29	0–4
Other descriptors	No mat, hydrocarbon rich	White and orange Beggiatoa mat	Edge of white Beggiatoa mat, hydrocarbon rich	Orange Beggiatoa mat	Patchy mat, hydrocarbon rich
mcrA phylotypes detected
Methylotrophic
Methanococcoides	+		+
Methanohalophilus			+		+
Methermicoccaceae	+				+
Aceticlastic
Methanosaeta	+
Hydrogenotrophic
Methanoplanus					+
GB Methanomicrobiales mcrA cluster	+				+
Methanomicrobiales Seep mcrA cluster					+
Methanocorpusculum	+	+
Methanocaldococcus	+				+
Methanopyrus					+
Methanotrophic
ANME-1		+	+	+	+
ANME-2	+		+		+
Unknown
Group e			+		+
Deeply Branching mcrA group I		+
Deeply Branching mcrA group II					+
Deeply Branching mcrA group III					+