Molecular Detection of Candidatus Scalindua pacifica and Environmental Responses of Sediment Anammox Bacterial Community in the Bohai Sea, China

摘要: The Bohai Sea is a large semi-enclosed shallow water basin, which receives extensive river discharges of various terrestrial and anthropogenic materials such as sediments, nutrients contaminants. How these terrigenous inputs may influence the diversity, community structure, biogeographical distribution, abundance ecophysiology sediment anaerobic ammonium oxidation (anammox) bacteria was unknown. To answer this question, an investigation employing both 16S rRNA hzo gene biomarkers carried out. Ca. Scalindua were predominant in surface sediments Sea, while non-Scalindua anammox also detected Yellow River estuary inner part Liaodong Bay that received strong riverine impacts. A novel sequence clade identified, putatively representing bacterial new candidate species tentatively named “Ca. pacifica”. Several groups environmental factors, usually with distinct physicochemical or biogeochemical natures, including general marine estuarine properties, availability substrates (inorganic N compounds), alternative reductants oxidants, variations caused by associated contaminants heavy metals, identified to likely play important roles influencing ecology functioning bacteria. In addition inorganic compounds might key role shaping microbiota, organic carbon, nitrogen, sulfate, sulfide metals all showed potentials participate process, releasing strict dependence upon direct be limiting certain areas Sea. importance other factors microbiota suggests active for situ transforming process maintained versatile life style well adapted varying conditions studied coastal ocean.