Dynamics of the Methanogenic Archaea in Tropical Estuarine Sediments

Table 3

Abundance of MA, acetoclastic activity, and methane production in sediments of Chantuto-Panzacola and Carretas-Pereyra, Chiapas. Mean values.

	Dry season		Rainy season
Depth	6	12	6	12
Chantuto-Panzacola
MA-acetate (cells/g)	1.30 × 10^5	2.99 × 10^4	2.20 × 10^7	2.09 × 10^7
MA-Hydrogen (cells/g)	1.63 × 10^6	9.55 × 10^4	9.37 × 10^6	8.63 × 10^6
MA-methanol (cells/g)	1.79 × 10^6	1.97 × 10^7	1.17 × 10^7	2.06 × 10^7
Acetate activity without SO4^−2 (mM acetate/g VS/day)	0.03	0.03	0.02	0.01
Acetate activity with SO4^−2 (mM acetate/g VS/day)	0.05	0.03	0.01	0.01
% CH4 without SO4^−2	4.81	7.91	23.50	29.73
% CH4 with SO4^−2	2.78	4.63	5.64	8.77
Carretas-Pereyra
MA-acetate (cells/g)	4.52 × 10^4	6.17 × 10^4	1.90 × 10^6	1.32 × 10^6
MA-Hydrogen (cells/g)	1.34 × 10^5	1.51 × 10^5	4.49 × 10^6	2.64 × 10^6
MA-methanol (cells/g)	1.34 × 10^6	8.24 × 10^6	1.27 × 10^7	2.21 × 10^7
Acetate activity without SO4^−2 (mM acetate/g VS/day)	0.03	0.02	0.01	0.01
Acetate activity with SO4^−2  (mM acetate/g VS/day)	0.04	0.03	0.01	0.01
% CH4 without SO4^−2	7.83	13.01	15.42	23.47
% CH4 with SO4^−2	4.02	6.55	6.41	13.02