Sulfur cycle
Videos
The sulfur cycle is a biogeochemical cycle in which the sulfur moves between rocks, waterways and living systems. It is important in geology as it affects many minerals and in life because sulfur is a
Sulfur cycle in general
Biogeochemical sulfur cycle of marine sediments
Sulfate-reducing microorganisms or sulfate-reducing prokaryotes are a group composed of sulfate-reducing bacteria and sulfate-reducing archaea, both of which can perform anaerobic respiration utilizin
Sulfur cycle
…of the more rapid enzymic reaction with 32S. Average present day seawater values of δ34S are on the order of +21‰. Prior to 2010s, it was thought that sulfate reduction could fractionate sulfur isotopes up to 46 permil and fractionation larger than 46 permil recorded in sediments must be due to disproportionation of…
Desulfovibrio vulgaris is the best-studied sulfate-reducing microorganism species; the bar in the upper right is 0.5 micrometre long.
Sludge from a pond; the black color is due to metal sulfides that result from the action of sulfate-reducing microorganisms.