page_title: Desulfobacter hydrogenophilus
section_title: Ecology
hierarchical_section_title: Desulfobacter hydrogenophilus / Ecology
caption_attribution_description: English&#x3a;&#32; Ponte del Parucheta on Rio di San Giacomo dall'Orio - VeniceFrançais&#x202f;&#x3a;&#32; Ponte del Parucheta sur le Rio di San Giacomo dall&#39;Orio - VeniseItaliano&#x202f;&#x3a;&#32; Ponte del Parucheta sul Rio di San Giacomo dall'Orio, a Venezia
context_page_description: Desulfobacter hydrogenophilus is a strictly anaerobic sulfate-reducing bacterium. It was isolated and characterized in 1987 by Friedrich Widdel of the University of Konstanz. Like most sulfate-reducing bacteria, D. hydrogenophilus is capable of completely oxidizing organic compounds to CO₂, and therefore plays a key role in biomineralization in anaerobic marine environments. However, unlike many SRB, D. hydrogenophilus is a facultative lithoautotroph, and can grow using H₂ as an electron donor and CO₂ as a carbon source. D. hydrogenophilus is also unique because it is psychrophilic. It is also diazotrophic, or capable of fixing nitrogen.
context_section_description: The strain AcRS1, which was isolated for the enrichment culture used to describe the species in 1986, was taken from Rio di San Giacomo in Venice, Italy.
  D. hydrogenophilus is most commonly found in anoxic brackish or marine sediments, but has also been found in anoxic freshwater sediments and in activated sludge.
  D. hydrogenophilus is ecologically unique in that it has a wide temperature and pH range. Unlike any other species in its genus, D. hydrogenophilus is psychrophilic, or capable of growth and reproduction at cold temperatures. Slow growth on acetate with a doubling time of 5 weeks still occurred at 0 °C in an ice water bath. Its optimum growth temperature is 29–32 °C (84–90 °F), but growth occurs at temperatures of 0–35 °C (32–95 °F). Optimum pH is 6.6–7.0, but growth occurs at pH values of 5.5–7.6.
caption: Bridge over the Rio di San Giacomo dell'Orio in Venice
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