Emission spectroscopy and kinetic fluorometry studies of phototrophic microbial communities along a salinity gradient in solar saltern evaporation ponds of Eilat, Israel

0335058 - MBÚ 2010 RIV DE eng J - Journal Article
Prášil, Ondřej - Bína, David - Medová, Hana - Řeháková, Klára - Zapomělová, Eliška - Veselá, J. - Oren, A.
Emission spectroscopy and kinetic fluorometry studies of phototrophic microbial communities along a salinity gradient in solar saltern evaporation ponds of Eilat, Israel.
Aquatic Microbial Ecology. Roč. 56, 2-3 (2009), s. 285-296. ISSN 0948-3055. E-ISSN 1616-1564
R&D Projects: GA AV ČR 1QS600170504; GA AV ČR 1QS500200570; GA ČR GA206/06/0462
Institutional research plan: CEZ:AV0Z60050516; CEZ:AV0Z50200510; CEZ:AV0Z50510513; CEZ:AV0Z60170517
Keywords : Phototrophic microbial communities * Hypersaline * Cyanobacteria
Subject RIV: EE - Microbiology, Virology
Impact factor: 1.743, year: 2009

The planktonic and benthic microbial communities in 8 hypersaline evaporation ponds of the Israel Salt Company in Eilat, Israel, with salinities ranging from 58 to 329 g l–1 (total dissolved salt), were studied using fluorescence emission spectroscopy and kinetic fluorometry. With increasing salinity, the anoxygenic phototrophic bacteria (containing bacteriochlorophyll a, bchl a) formed a significant and increasing fraction of the planktonic phototrophic biomass. While the bchl a/chl a molar ratio was 0.01 at the lowest salinity, it reached almost 1 at the higher salinities. In the benthic communities, emission spectroscopy revealed depth-dependent changes in the photophysiology of benthic oxygenic phototrophs, and spatial variability in the abundance of several groups of anoxygenic photosynthetic bacteria (green bacteria containing chlorosomes and purple bacteria containing LH1)
Permanent Link: http://hdl.handle.net/11104/0179636