Diatoms from littoral zone of Lake Constance: Diversity, phylogeny, extracellular polysaccharide and bacterial association
نویسندگان
چکیده
16 Introduction 17 Materials and Methods 19 Results 22 Discussion 27 Acknowledgements 32 Annexure 1 33 3 Seasonal fluctuations of epilithic diatoms and extracellular polymeric substances from the littoral zone of Lake Constance 40 Abstract 4
منابع مشابه
Bacteria associated with benthic diatoms from Lake Constance: phylogeny and influences on diatom growth and secretion of extracellular polymeric substances.
The composition of diatom-associated bacterial communities was studied with 14 different unialgal xenic diatom cultures isolated from freshwater epilithic biofilms of Lake Constance, Germany. A clear dominance of Alphaproteobacteria was observed, followed by Betaproteobacteria, Gammaproteobacteria, Bacteroidetes, and Verrucomicrobia. Pure cultures of the diatom Cymbella microcephala, which was ...
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Elstera litoralis, is a Rhodospirillaceae member which was isolated from the littoral zone of Lake Constance from a stone biofilm using diatom extracellular polymeric substances (EPS) as C source. We present here the draft genome of E. litoralis which has a genome size of 3.83 Mb and 61.2% G+C content. Genome analysis indicated utilization of multiple C substrates explaining its heterotrophic l...
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In this report we describe different combinations of physical separation and antibiotic treatment to remove associated bacteria from freshwater diatoms. Diatoms were purified either from natural epilithic biofilms or from uni-algal cultures. We found that for most strains different purification procedures have to be combined individually. In a new approach we show that for some diatom strains t...
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Observations in the littoral zone of a large lake (Lake Constance) revealed strong and periodic fluctuations of temperature and current velocity on timescales between 10 and 15 min associated with high-frequency internal waves. The peak in the spectral energy of the current velocity fluctuations associated with high-frequency internal waves follows the seasonal dynamics of stratification, descr...
متن کاملHigh-frequency internal waves in the littoral zone of a large lake
Observations in the littoral zone of a large lake (Lake Constance) revealed strong and periodic fluctuations of temperature and current velocity on timescales between 10 and 15 min associated with high-frequency internal waves. The peak in the spectral energy of the current velocity fluctuations associated with high-frequency internal waves follows the seasonal dynamics of stratification, descr...
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