title: The microbial community structure of drinking water biofilms can be affected by phosphorus availability.
abstract: Microbial communities in biofilms grown for 4 and 11 weeks under the flow of drinking water supplemented with 0, 1, 2, and 5 microg of phosphorus liter(-1) and in drinking and warm waters were compared by using phospholipid fatty acids (PLFAs) and lipopolysaccharide 3-hydroxy fatty acids (LPS 3-OH-FAs). Phosphate increased the proportion of PLFAs 16:1 omega 7c and 18:1 omega 7c and affected LPS 3-OH-FAs after 11 weeks of growth, indicating an increase in gram-negative bacteria and changes in their community structure. Differences in community structures between biofilms and drinking and warm waters can be assumed from PLFAs and LPS 3-OH-FAs, concomitantly with adaptive changes in fatty acid chain length, cyclization, and unsaturation.
authors.affiliation: Laboratory of Environmental Microbiolog, National Public Health Institute, FIN-70701 Kuopio, Finland. Minna.Keinanen@ktl.fi
authors.forename: Minna M
authors.initials: MM
authors.lastname: Keinänen
authors.forename: Leena K
authors.initials: LK
authors.lastname: Korhonen
authors.forename: Markku J
authors.initials: MJ
authors.lastname: Lehtola
authors.forename: Ilkka T
authors.initials: IT
authors.lastname: Miettinen
authors.forename: Pertti J
authors.initials: PJ
authors.lastname: Martikainen
authors.forename: Terttu
authors.initials: T
authors.lastname: Vartiainen
authors.forename: Merja H
authors.initials: MH
authors.lastname: Suutari
mesh_terms: D001419:Bacteria / Q000145:classification / Q000187:drug effects* / Q000254:growth & development; D018441:Biofilms / Q000187:drug effects* / Q000254:growth & development; D017753:Ecosystem; D005227:Fatty Acids / Q000032:analysis; D008070:Lipopolysaccharides / Q000737:chemistry; D010743:Phospholipids / Q000032:analysis; D010758:Phosphorus / Q000494:pharmacology*; D014871:Water Microbiology; D014881:Water Supply
chemical_list: D005227:Fatty Acids; D008070:Lipopolysaccharides; D010743:Phospholipids; D010758:Phosphorus