Table 5.

Distribution and potential electron donor range of sulfate-reducing, bacterial genera detected in Avicennia marina forest soils along the Red Sea Coast of Saudi Arabia.

Family	Genus	Sampling site and depth				Potential electron donors based on literature data	Reference
		South Corniche		Thuwal
		surface	sub-surface	surface	sub-surface
Desulfobacteraceae	Desulfobacter	+				Acetate and ethanol	Widdel, 1987
	Desulfobacterium		+			Methanol, glutarate, glutamate, phenol, aniline, nicotinate, indole	Cravo-Laureau et al., 2004
	Desulfosarcina	+				H2, fatty acids, ethanol, phenyl-substituted organic acids	Widdel, 1980; Rabus et al., 2006
	Unknown	+	+
	Unknown			+	+
Desulfobulbaceae	Desulfobulbus			+	+	H2, ethanol, propionate, lactate	Widdel and Pfennig, 1982; Rabus et al., 2006
	Desulfopila	+	+	+		Lactate, alcohols	Suzuki et al., 2007
Desulfohalobiaceae	Desulfonauticus	+	+			H2	Audiffrin et al., 2003
Desulfovibrionaceae	Desulfovibrio			+		H2, methanol, ethanol, lactate, glycerol, glycine, alanine, choline, furfural	Rabus et al., 2006
	unknown	+	+		+
Syntrophaceae	Desulfobacca				+	Acetate and ethanol	Oude Elferink et al., 1999; Rabus et al., 2006
	Desulfomonile				+	H2, phenyl-substituted organic acids, 3- or 4-anisate	Rabus et al., 2006
	unknown			+	+
Syntrophobacteraceae	Syntrophobacter			+	+	Propionate	Boone and Bryant, 1980; Harmsen et al., 1993
Firmicutes	Desulfotomaculum			+	+	Methanol, ethanol, alanine	Widdel and Pfennig, 1977

Presence of genera is based presence on DGGE gels. Bold: Relatively poorly oxidizable electron donors.