title: Regulation of oceanic silicon and carbon preservation by temperature control on bacteria.
abstract: We demonstrated in laboratory experiments that temperature control of marine bacteria action on diatoms strongly influences the coupling of biogenic silica and organic carbon preservation. Low temperature intensified the selective regeneration of organic matter by marine bacteria as the silicon:carbon preservation ratio gradually increased from approximately 1 at 33 degrees C to approximately 6 at -1.8 degrees C. Temperature control of bacteria-mediated selective preservation of silicon versus carbon should help to interpret and model the variable coupling of silicon and carbon sinking fluxes and the spatial patterns of opal accumulation in oceanic systems with different temperature regimes.
authors.affiliation: Marine Biology Research Division, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093-0202, USA. bidle@imcs.rutgers.edu
authors.forename: Kay D
authors.initials: KD
authors.lastname: Bidle
authors.forename: Maura
authors.initials: M
authors.lastname: Manganelli
authors.forename: Farooq
authors.initials: F
authors.lastname: Azam
mesh_terms: D000222:Adaptation, Physiological; D000864:Antarctic Regions; D001419:Bacteria / Q000254:growth & development / Q000302:isolation & purification / Q000378:metabolism*; D002140:California; D002244:Carbon / Q000378:metabolism*; D017377:Diatoms / Q000378:metabolism*; D010450:Endopeptidases / Q000378:metabolism; D020387:Food Chain; D019015:Geologic Sediments; D006868:Hydrolysis; D009792:Oceans and Seas; D010140:Pacific Ocean; D012623:Seawater / Q000737:chemistry / Q000382:microbiology*; D012825:Silicon / Q000378:metabolism*; D013696:Temperature
chemical_list: D002244:Carbon; D010450:Endopeptidases; D012825:Silicon