Dynamics of the Methanogenic Archaea in Tropical Estuarine Sediments

Table 1

Environmental variables in the coastal lagoon sediments of Chantuto-Panzacola and Carretas-Pereyra, Chiapas. Mean ± Standard deviation.

	Dry season		Rainy season
Depth	6	12	6	12
Chantuto-Panzacola
Temperature (°C)	29.2±1.1	28.3±1.3	28.1±1.5	26.7±1.5
Salinity (‰)	21.3±6.1	18.6±5.1	2.5±2.5	2.8±3.1
Sulphate (mM)	11.0±1.8	9.8±1.2	3.8±1.4	2.9±0.9
pH	7.1±0.1	7.0±0.1	6.7±0.2	6.8±0.1
Eh (mV)	−206 ± 76	−356 ± 34	−104 ± 4	−286 ± 53
Total Solids (TS, g/L)	445.50±120.65	338.12±79.11	320.79±153.2	303.50±151.07
Volatile Solids (VS, g/L)	42.61±20.19	47.40±34.86	75.82±41.0	68.76±51.98
Porosity (g/cm^3)	0.3±0.1	0.4±0.08	0.4±0.1	0.4±0.1
Organic matter (%)	7.2±3.4	5.9±3.8	9.8±5.5	5.8±3.2
Organic carbon (%)	4.1±2.0	3.4±2.2	5.7±3.1	3.3±1.8
Carbohydrates (mg/L)	5.6±4.0	6.5±4.0	5.0±1.0	5.9±4.1
Carretas-Pereyra
Temperature (°C)	29.4±0.8	28.5±0.7	28.5±1.9	28.3±0.9
Salinity (‰)	27.3±5.3	23.5±3.3	4.3±4.08	3.2±3.8
Sulphate (mM)	13.0±1.4	11.7±1.3	3.5±1.98	1.9±1.4
pH	6.9±0.1	6.8±0.1	6.8±0.1	6.7±0.1
Eh (mV)	−296 ± 83	−411 ± 66	−152 ± 46	−369 ± 99
Total Solids (TS, g/L)	261.70±135.49	229.49±134.29	211.56±123.36	188.41±97.24
Volatile Solids (VS, g/L)	75.22±35.27	85.05±71.58	28.40±12.90	40.39±22.98
Porosity (g/cm^3)	0.2±0.07	0.2±0.1	0.4±0.1	0.5±0.1
Organic matter (%)	12.5±4.5	25.4±19.2	10.0±4.5	15.7±8.8
Organic carbon (%)	7.2±4.5	14.5±11.02	6.1±2.6	9.03±5.04
Carbohydrates (mg/L)	6.8±3.6	6.0±3.5	3.8±1.2	5.3±3.5