Contrasting trends in distribution of four major planktonic betaproteobacterial groups along a pH gradient of epilimnia of 72 freshwater habitats

0379238 - BC 2013 RIV GB eng J - Journal Article
Jezbera, Jan - Jezberová, Jitka - Koll, U. - Horňák, Karel - Šimek, Karel - Hahn, M.W.
Contrasting trends in distribution of four major planktonic betaproteobacterial groups along a pH gradient of epilimnia of 72 freshwater habitats.
FEMS Microbiology Ecology. Roč. 81, č. 2 (2012), s. 467-479. ISSN 0168-6496. E-ISSN 1574-6941
R&D Projects: GA ČR(CZ) GAP504/10/0566; GA ČR(CZ) GA206/08/0015
Institutional support: RVO:60077344
Keywords : in-situ hybridization * bacterial community composition * dissolved organic-matter
Subject RIV: EE - Microbiology, Virology
Impact factor: 3.563, year: 2012

The distribution and abundance of Betaproteobacteria and three of its genera –Limnohabitans (R-BT065 lineage), Polynucleobacter (including subclusters Polynucleobacter necessarius and Polynucleobacter acidiphobus/Polynucleobacter difficilis), and Methylophilus – across the epilimnia of 72 limnologically diverse freshwater habitats were investigated using fluorescence in situ hybridization. Betaproteobacteria comprised on average 29.1%, Polynucleobacter 11.6%, P. necessarius 10.1%, P. acidiphobus/difficilis 0.5%, Limnohabitans 8.9%, and Methylophilus 0.9% of total bacterioplankton cells in the investigated habitats. Polynucleobacter necessarius and Limnohabitans coexisted in the majority of habitats but showed contrasting abundance patterns along the pH gradient of habitats (pH, 3.8–8.5). The observed patterns could be explained by different preferences for substrate sources, that is, substances of humic origin in acidic waters and algal-derived substances in alkaline waters.
Permanent Link: http://hdl.handle.net/11104/0210493