Waldemar Siuda
University of Warsaw
22 Papers
110 Citations
Waldemar Siuda is an academic researcher from University of Warsaw. The author has contributed to research in topics: Trophic state index & Eutrophication. The author has an hindex of 8, co-authored 21 publications.
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Papers
Structural and functional microbial diversity along a eutrophication gradient of interconnected lakes undergoing anthropopressure
Bartosz Kiersztyn,Ryszard J. Chróst,Tomasz Kaliński,Waldemar Siuda,Aleksandra Bukowska,Grzegorz Kowalczyk,Karolina Grabowska +6 more
TL;DR: An analysis of the 16S rRNA-based taxonomical structure of bacteria together with an analysis of carbon source utilization ability using EcoPlate (Biolog, USA) metabolic fingerprinting assessment against the backdrop of physicochemical parameters in fifteen interconnected lakes found some significant links between the taxonomic and metabolic structure of the microbes in the studied lakes.
A method for determining enzymatically hydrolyzable phosphate (EHP) in natural waters1
TL;DR: The new method is simple, accurate, and can be used in both freshwater and marine studies, and is particularly recommended for determination in hypereutrophic waters, when Pi concentrations exceed 25 µg P liter−1.
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Concentration and susceptibility of dissolved DNA for enzyme degradation in lake watersome methodological remarks
Waldemar Siuda,Ryszard J. Chróst +1 more
TL;DR: Concentrations of enzymatically hydrolysable DNA determined by the enzymatic method were 27 to 54 % lower than those measured by CTAB-DNA precipitation and DAPI staining and correlated positively with algal pigment concentrations and bacterial numbers.
Distribution and origin of dissolved DNA in lakes of different trophic states
TL;DR: It is suggested that eukaryotic microorganisms (algae) are the most lrnportant sources of dDNA in lake water, whereas bacteria mainly decompose the dDNA pool.
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Persistence of bacterial proteolytic enzymes in lake ecosystems.
TL;DR: Proteolytic enzyme persistence and the role of dead (or metabolically inactive) aquatic bacteria in organic matter cycling are analyzed and it is observed that proteases built into bacterial cell debris fragments remained active for a long time, even after the total destruction of cells.
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