Table 2 Physicochemical parameters of a soft microbial mat from Laguna Pozo Bravo
From: Seasonal biogeochemical variations in a modern microbialite reef under early Earth-like conditions
Physicochemical parameter | Unit | Winter value | Summer value |
|---|---|---|---|
pH | 7.3 | 7.6 | |
Conductivity 1:5 | mS cm–1 | >20 | 8.32 |
Humidity | % w/w | 58.6 | 47.3 |
Organic material | % w/w | 10.4 | 13.3 |
Chlorine | mg Kg–1 | 101,000 | 25,620 |
Sodium | mg Kg–1 | 66,900 | 24,800 |
Potassium | mg Kg–1 | 22,500 | 1040 |
Phosphate | mg Kg–1 | <50.00 | <50.00 |
Total phosphorus | mg Kg–1 | 86.7 | 173 |
Nitrate | mg Kg–1 | <1.00 | <50.00 |
Nitrite | mg Kg–1 | 390 | <1.00 |
Ammoniacal nitrogen | mg Kg–1 | 140 | 457 |
Sulphate | mg Kg–1 | 2720 | 1690 |
Arsenic | mg Kg–1 | 282 | 201 |
Calcium | mg Kg–1 | 121,000 | 144,000 |
Lithium | mg Kg–1 | 145 | 58.6 |
Magnesium | mg Kg–1 | 13,000 | 14,516 |
Dissolved silica | mg Kg–1 | 2200 | 994 |
Iron | mg Kg–1 | 5780 | 1621 |
Boron | mg Kg–1 | 1100 | 371 |
Copper | mg Kg–1 | 32.5 | 13.3 |
Nickel | mg Kg–1 | <5.00 | 1.7 |
Manganese | mg Kg–1 | 3760 | 1996 |
Bromine | mg Kg–1 | <50.00 | <50.00 |
Mercury | mg Kg–1 | <0.80 | <0.10 |
Chromium | mg Kg–1 | 52.6 | 1.3 |
Aluminium | mg Kg–1 | 6580 | 1547 |
Cadmium | mg Kg–1 | 17.3 | 1.1 |
Lead | mg Kg–1 | <20.0 | <0.60 |
Tin | mg Kg–1 | <50.00 | <1.25 |
Cyanide | mg Kg–1 | <50.00 | <0.25 |
