Unusually High Archaeal Diversity in a Crystallizer Pond, Pomorie Salterns, Bulgaria, Revealed by Phylogenetic Analysis

Table 2

Comparison of the archaeal diversity in Pomorie saltern and other thalassohaline hypersaline ecosystems.

Saltern	Additional environmental factors	Number of OTUs presented	Division presented, %	Number of genera presented	Dominant genera, %	New sequences, %	Reference
Pomorie	Temp. 24°C, annual rainfall 598 mm/year, pH 7.2, organic carbon 190 mg/L	27	Halobacteriaceae Haloferacaceae	15	Halanaeroarchaeum, 28, Halorubrum, 23, Halonotius, 17	53.9	This study
Maras salterns	pH 6.5–7.0	6	Halobacteriaceae	2	Haloquadratum, 69, Halobacterium, 31	33.3	[13]
Guerrero Negro saltern (ponds with more than 30% salt)	Temp. 16.2–18.9°C	19	Halobacteriaceae	4	Haloquadratum, >60%	n.d.	[7]
Tunisian solar saltern, S5	Annual rainfall 230 mm/year average temperature of 15 and 33°C for the hottest and coldest months, respectively,; pH 7.4	40	Halobacteriaceae	3	Haloquadratum, 55, Halorubrum, 36	66.7	[2]
Santa Pola salterns (32% salt pond)	Temp. 28°C	11	Halobacteriaceae	4	Halorubrum	n.d.	[10]
Three salterns, Bengal Bay, India	pH 7.22–7.89 Temperature 32.1–36.6	10	Halobacteriaceae Haloferacaceae	9	Natrinema, 32.4%, Halorubrum, 19.1%, Halogeometricum, 11.8%, Haloferax, 11.8%	0	[8]

Phylogenetic groups representing more than 10% of the community sequences were determined as dominant.
Sequences with less than 97% similarity to the closest neighbor were referred to as new sequences.