Buoyancy studies in natural communities of square gas-vacuolate archaea in saltern crystallizer ponds

Aquatic Biosystems

Table 1 Chemical and biological properties of the brine samples examined.

Sample	Date	Pond no.	Density (kg m^-3)	Prokaryotes (cells ml^-1)	Relative abundance of square cells (%)
1	April 6, 2005	304^a	1,238 (25°C)	2.4 ± 0.3 × 10⁷	70
2	June 8, 2005	305^b	1,227 (29°C)	3.6 ± 0.3 × 10⁷	80
3	August 30, 2005	301	1,240 (33°C)	2.6 ± 0.4 × 10⁷	81

^a For a map of the Eilat saltern ponds and the location of the ponds, see [34].
^b Pond 305 is the former evaporation pond 205, in recent years converted to a crystallizer pond.