PMID- 18997033 OWN - NLM STAT- MEDLINE DCOM- 20090126 LR - 20181113 IS - 1098-5336 (Electronic) IS - 0099-2240 (Print) IS - 0099-2240 (Linking) VI - 75 IP - 1 DP - 2009 Jan TI - Abundance and activity of methanotrophic bacteria in littoral and profundal sediments of lake constance (Germany). PG - 119-26 LID - 10.1128/AEM.01350-08 [doi] AB - The abundances and activities of aerobic methane-oxidizing bacteria (MOB) were compared in depth profiles of littoral and profundal sediments of Lake Constance, Germany. Abundances were determined by quantitative PCR (qPCR) targeting the pmoA gene and by fluorescence in situ hybridization (FISH), and data were compared to methane oxidation rates calculated from high-resolution concentration profiles. qPCR using type I MOB-specific pmoA primers indicated that type I MOB represented a major proportion in both sediments at all depths. FISH indicated that in both sediments, type I MOB outnumbered type II MOB at least fourfold. Results obtained with both techniques indicated that in the littoral sediment, the highest numbers of methanotrophs were found at a depth of 2 to 3 cm, corresponding to the zone of highest methane oxidation activity, although no oxygen could be detected in this zone. In the profundal sediment, highest methane oxidation activities were found at a depth of 1 to 2 cm, while MOB abundance decreased gradually with sediment depth. In both sediments, MOB were also present at high numbers in deeper sediment layers where no methane oxidation activity could be observed. FAU - Rahalkar, M AU - Rahalkar M AD - Universitat Konstanz, Fachbereich Biologie, LS Mikrobielle Okologie, Fach M 654, D-78457 Constance, Germany. FAU - Deutzmann, J AU - Deutzmann J FAU - Schink, B AU - Schink B FAU - Bussmann, I AU - Bussmann I LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20081107 PL - United States TA - Appl Environ Microbiol JT - Applied and environmental microbiology JID - 7605801 RN - 0 (Bacterial Proteins) RN - 0 (DNA Primers) RN - OP0UW79H66 (Methane) SB - IM MH - Aerobiosis MH - Bacteria/genetics/*isolation & purification/*metabolism MH - Bacterial Proteins/genetics MH - DNA Primers/genetics MH - Geologic Sediments/*microbiology MH - Germany MH - In Situ Hybridization, Fluorescence/methods MH - Methane/*metabolism MH - Oxidation-Reduction MH - Polymerase Chain Reaction/methods PMC - PMC2612212 EDAT- 2008/11/11 09:00 MHDA- 2009/01/27 09:00 PMCR- 2009/07/01 CRDT- 2008/11/11 09:00 PHST- 2008/11/11 09:00 [pubmed] PHST- 2009/01/27 09:00 [medline] PHST- 2008/11/11 09:00 [entrez] PHST- 2009/07/01 00:00 [pmc-release] AID - AEM.01350-08 [pii] AID - 1350-08 [pii] AID - 10.1128/AEM.01350-08 [doi] PST - ppublish SO - Appl Environ Microbiol. 2009 Jan;75(1):119-26. doi: 10.1128/AEM.01350-08. Epub 2008 Nov 7.