TY  - JOUR
A1  - Cepakova, Zuzana
A1  - Hrouzek, Pavel
A1  - Ziskova, Eva
A1  - Nuyanzina-Boldareva, Ekaterina
A1  - Sorf, Michal
A1  - Kozlikova-Zapomelova, Eliska
A1  - Salka, Ivette
A1  - Grossart, Hans-Peter
A1  - Koblizek, Michal
T1  - High turnover rates of aerobic anoxygenic phototrophs in European freshwater lakes
JF  - Environmental microbiology
N2  - Aerobic Anoxygenic Phototrophic (AAP) bacteria are bacteriochlorophyll (BChl) a -containing organisms which use light energy to supplement their predominantly heterotrophic metabolism. Here, we investigated mortality and growth rates of AAP bacteria in three different freshwater lakes in Central Europe: the mountain lake Plesne, the oligo-mesotrophic Lake Stechlin and the forest pond Huntov. The mortality of AAP bacteria was estimated from diel changes of BChl a fluorescence. Net and gross growth rates were calculated from the increases in AAP cell numbers. The gross growth rates of AAP bacteria ranged from 0.38 to 5.6 d(-1), with the highest values observed during summer months. Simultaneously, the rapidly growing AAP cells have to cope with an intense grazing pressure by both zooplankton and protists. The presented results document that during the day, gross growth usually surpased mortality. Our results indicate that AAP bacteria utilize light energy under natural conditions to maintain rapid growth rates, which are balanced by a generally intense grazing pressure.
Y1  - 2016
U6  - https://doi.org/10.1111/1462-2920.13475
SN  - 1462-2912
SN  - 1462-2920
VL  - 18
SP  - 5063
EP  - 5071
PB  - Wiley-Blackwell
CY  - Hoboken
ER  -