. 2018 Apr 3;9:510. doi: 10.3389/fmicb.2018.00510

Table 1.

Microbialite sample locations, physicochemical and geochemical aquatic environment.

Aquatic ecosystem	Temp (°C)	pH	Conductivity (mS/cm)	Salinity (psu)	Altitude (masl)	Major cations in water	Ca⁺²	Mg⁺²	Na⁺	K⁺	Cl⁻	${SO}_{4}^{- 2}$	HCO3⁻	Mg:Ca	References
							mg/L
Soda inland (athalassohaline)
AS, AC Alchichica lake, Mexico	18.7	9.3	13.0	7.5	2,350	Na⁺> Mg⁺² > K⁺ > Ca⁺²	11	431	2,349	232	3,195	978	966	39.182	3, 4, 7
Karst inland (oligosaline)
PAI Pozas Azules, Mexico	28.8	7.4	2.7	1.5^c	0–700	Ca⁺²> Na⁺> Mg⁺²	385	114	165	10	121	1,441	189	0.30	1, 2
Karst inland-coastal (oligosaline)
BAC Bacalar Lagoon, Mexico	29	7.8	2.2	1.2^c-9	0–20	Ca⁺² > Mg⁺² > Na⁺	320	78	61	5	70	1,112	171	0.24	5
MU Muyil Lagoon, Mexico	25.5	7.7	1.7	0.7	0–20	Na⁺> Mg⁺² > Ca⁺² >K⁺	48	37	147	4	277	38	201	0.76	2, 6
Karst coastal (hypersaline)
CU Sabinal (Sabana-Camagüey System), Cuba	29	8.9	97.2	58.8	0–20	Na⁺> Mg⁺² > K⁺ >Ca⁺²	750	2,689	21,046	807	43,330	5,529	–	3.59	This study

¹Johannesson et al., 2014 (mean Cuatro Cienegas); ²Centeno et al., 2012; ³Armienta et al., 2008; ⁴Caballero et al., 2003; ⁵Gischler et al., 2008; ⁶Lagomasino et al., 2015; ⁷Kaźmierczak et al., 2011; ^ccalculated from conductivity.