Table 4.

Overview of AOA analyzed for GDGTs^b

Enrichment/isolate	Location	Source	Temp (°C)		NH4+ (μM)	pH	Reference
			In situ	Culture
“Ca. Nitrosoarchaeum limnia”	San Francisco Bay estuary	Estuarine sediment	21.6	22	500	7.0–7.2	2; this work
SJ′	Donghae, South Korea	Coastal marine sediment	0.5	25	100	8.2	25; this work
AR′	Svalbard, Norway	Coastal marine sediment	−0.5	25	100	8.2	25; this work
“Ca. Nitrosopumilus maritimus SCM1”	Tropical aquarium	Gravel	21–23	28	500	7.0–7.2	19, 33
“Ca. Nitrososphaera gargensis”	Siberia Garga hot spring	Microbial mat	<60	46	500	7.8	13, 29
“Ca. Nitrosocaldus yellowstonii”a	Yellowstone Heart Lake hot spring	Sediment	70–80	72	95	8.3	6
“Ca. Cenarchaeum symbiosum”a	Santa Barbara, CA	Marine sponge A. mexicana	8–18	10	n.s.	n.s.	31, 41

^aAnalyzed for core lipids, not for IPLs.

^bn.s., not specified.