Broad habitat range of the phylogenetically narrow R-BT065 cluster, representing a core group of the Betaproteobacterial genus .i.Limnohabitans./i

0340404 - BC 2010 RIV US eng J - Článek v odborném periodiku
Šimek, Karel - Kasalický, Vojtěch - Jezbera, Jan - Jezberová, Jitka - Hejzlar, Josef - Hahn, M.W.
Broad habitat range of the phylogenetically narrow R-BT065 cluster, representing a core group of the Betaproteobacterial genus Limnohabitans
Applied and Environmental Microbiology. Roč. 76, č. 3 (2010), s. 631-639. ISSN 0099-2240. E-ISSN 1098-5336
Grant CEP: GA ČR(CZ) GA206/08/0015; GA MŠMT(CZ) MEB060702
Výzkumný záměr: CEZ:AV0Z60170517
Klíčová slova: R-BT065 cluster * Betaproteobacteria * freshwater habitats * pH * DOC * algal-derived substrates
Kód oboru RIV: DA - Hydrologie a limnologie
Impakt faktor: 3.778, rok: 2010

The distribution of the genus-like R-BT065 cluster (Betaproteobacteria) in 102 various freshwater systems was examined by using a specific FISH probe. The relative proportions of the cluster (on average 10% of total bacterioplankton) were significantly lower in humic and acidified lakes than in pH-neutral or alkaline habitats. The abundance of these bacteria were positively related to higher pH, conductivity, and the proportion of low-molecular-weight compounds in dissolved organic carbon and negatively related to the total DOC and dissolved aromatic carbon contents. Together, these parameters explained 61% of the variability in the cluster occurrence. No clear relationship of its occurrence to factors indicating the trophic status of habitats was found. Overall, the R-BT065 cluster is a ubiquitous, highly active segment of bacterioplankton in nonacidic lakes and ponds and alga-derived substrates form the main substrates pool responsible for its ecological success in freshwaters.
Trvalý link: http://hdl.handle.net/11104/0183650