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Effect of D8 motorway salting in the winter months: Results of monitoring the species composition and abundance of aquatic organisms in adjacent streams during the 2020 growing season.
Blabolil, Petr ; Kučerová, Andrea ; Matěna, Josef ; Peltanová, Jana ; Bešta, Tomáš ; Rychtecký, Pavel ; Peterka, Jiří
The aim of the report is to document the effect of chloride toxicity on aquatic organisms in the recipients in the vicinity of the D8 motorway, km 48,276 - 64,689, where the motorway passes through the České středohoří Protected Landscape Area. The summary of the achieved results for the vegetation season 2020 is the content of the presented report.
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Effect of D8 motorway salting in the winter months: Summary of the results of monitoring the species composition and abundance of aquatic organisms in adjacent streams during the growing seasons 2018 to 2020.
Peterka, Jiří ; Blabolil, Petr ; Kučerová, Andrea ; Matěna, Josef ; Bešta, Tomáš ; Rychtecký, Pavel
The aim of the report is to document the effect of chloride toxicity on aquatic organisms in the recipients in the vicinity of the D8 motorway, km 48,276 - 64,689, where the motorway passes through the České středohoří Protected Landscape Area. The summary of the achieved results for the vegetation seasons 2018 till 2020 is the content of the presented report.
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Pattern as a functional trait, case study on Mallomonas chrysophytes
Knotek, Petr ; Němcová, Yvonne (advisor) ; Rychtecký, Pavel (referee)
The patterns that can be admired on the surface of many living creatures are also found in many microscopic organisms outside of the macroscopic world we are familiar with. However, their significance and function are yet little understood compared to those of the macroscopic world. In diatoms (Bacillariophyceae) and coccoliths (Haptophyceae), several hypotheses have already been developed concerning the function of their patterned shells. One hypothesis considers the shell as a photonic entity that could reflect UV radiation away from the cell. Others focus more on its mechanical properties, which are among the most impressive within biological structures. Silica-scaled chrysophytes (Synurales, Stramenopiles) also possess a complex shell (or scale-case). Cells are covered with scales (about 4 µm in size) that are very regularly arranged and form a siliceous scale-case on the surface. The pattern on the scales is species-specific and has undergone gradual modification during evolution. This work aims to assess whether the patterning of siliceous scales in the order Synurales can be considered a functional trait or it is a result of neutral evolution. To test the possible photonic properties of the patterned structures, a pair of growth experiments were performed. The experimental cultures were...
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Hydrobiological monitoring of Medard lake in 2011
Kubečka, Jan ; Blabolil, Petr ; Borovec, Jakub ; Čech, Martin ; Draštík, Vladislav ; Hejzlar, Josef ; Nedoma, Jiří ; Peterka, Jiří ; Prachař, Zdeněk ; Rychtecký, Pavel ; Seďa, Jaromír ; Vejřík, Lukáš ; Znachor, Petr
The report summarizes results of research on limnological components of lake Medard (former opencast mine Medard-Libík) achieved in 2011, and suggests recommendations for further monitoring of the lake.
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Spatial heterogeneity and seasonal succession of phytoplankton along the longitudinal gradient in a eutrophic reservoir
RYCHTECKÝ, Pavel
Spatial distribution and seasonal succesion of phytoplankton along the longitudinal axis of a eutrophic Římov reservoir (Czech Republic) was investigated from April to October 2007, at 1?2 week intervals. Phytoplankton spatial heterogeneity was the most apparent during the summer reflecting a pronounced gradient of environmental parameters from the river inflow to the dam. The riverine zone differed markedly from downstream parts of the reservoir, being dominated by functional groups D and J (large cryptophytes and colonial diatoms). While a dense cyanobacterial bloom (groups H1 and M) occurred in the transition zone, considerably lower biomass of desmids (Group N) was found at lacustrine zone at the same time. A sudden flood event considerably altered nutrient and light availability, and later even resulted in cyanobacterial dominance in the whole reservoir.
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