title: Impact of bacterial NO3(-) transport on sediment biogeochemistry.
abstract: Experiments demonstrated that Beggiatoa could induce a H2S-depleted suboxic zone of more than 10 mm in marine sediments and cause a divergence in sediment NO3(-) reduction from denitrification to dissimilatory NO3(-) reduction to ammonium. pH, O2, and H2S profiles indicated that the bacteria oxidized H2S with NO3(-) and transported S0 to the sediment surface for aerobic oxidation.
authors.affiliation: National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.
authors.forename: Mikio
authors.initials: M
authors.lastname: Sayama
authors.forename: Nils
authors.initials: N
authors.lastname: Risgaard-Petersen
authors.forename: Lars Peter
authors.initials: LP
authors.lastname: Nielsen
authors.forename: Henrik
authors.initials: H
authors.lastname: Fossing
authors.forename: Peter Bondo
authors.initials: PB
authors.lastname: Christensen
mesh_terms: D019015:Geologic Sediments / Q000737:chemistry* / Q000382:microbiology*; D006862:Hydrogen Sulfide / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D009566:Nitrates / Q000378:metabolism*; D010100:Oxygen / Q000032:analysis; D041962:Thiotrichaceae / Q000378:metabolism*
chemical_list: D009566:Nitrates; D010100:Oxygen; D006862:Hydrogen Sulfide