| diversity and composition of sulfate- and sulfite-reducing prokaryotes as affected by marine-freshwater gradient and sulfate availability. | sulfate- and sulfite-reducing prokaryotes (ssrp) communities play a key role in both sulfur and carbon cycles. in estuarine ecosystems, sulfate concentrations change with tides and could be limited in tidal freshwater reach or deep sediments. in a subtropical estuary of northern taiwan in december 2007, we examined the compositional changes of ssrp communities. we examined three sites: from the lower estuarine brackish-water reach (site gr and mangrove vegetation site, gm) to the upper estuarine ... | 2011 | 21785985 |