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Možnosti zlepšení kvality vody v chovu ryb pomocí plovoucích mokřadů - přehledová studie
JINDRA, Tomáš
The bachelor thesis deals with the technology of floating wetlands, which construction could lead to improvement of water quality in fishponds. The aim of the thesis is to describe existing methods of water purification using wetlands with surface and subsurface water flow (root treatment plants). Further, to describe the method of refining in biological treatment reservoirs. One of the main chapters describes the construction of an artificial floating wetland. The cost / function ratio is often emphasized in their construction. However, it is important to mention that not all materials have a positive effect on water quality such as artificial materials. If possible, natural biodegradable materials that are environmentally friendly and often easier to handle with should be preferred. In addition, they are able to decompose in the environment and this can also save the cost of their disposal. In the thesis, a list of suitable wetland plants is proposed, focusing on species that are capable of growth and survival in our climatic conditions. The choice of species also depends on the type of habitat. Due to the low water transparency in fishponds, emergent and floating plant species, such as common reed (Phragmites australis), reed canary grass (Phalaris arundinacea), cattail (Typha spp.), branched bur-reed (Sparganium erectum) and duckweed (Lemna spp.), could be suitable. Nowadays, fishponds are in unsustainable conditions and water quality may become a limiting factor in fish production in the future. Floating wetlands may play an important role in its improvement.
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Growth of the common reed (\kur{Phragmites australis}) in a selected constructed wetland used for wastewater treatment.
MOULISOVÁ, Lenka
The Bachelor{\crq}s thesis is a part of the Project of GACR 206/06/0058 Monitoring the heavy metals and the selected risk elements in a waste water cleaning process in artificial wetlands. This work is aimed at evaluating the growth characteristics of the common reed, Phragmites australis, in a constructed wetland used for wastewater treatment. A destructive method was used for sampling. The samples were taken in the inflow and the outflow parts of the vegetated bed in one vegetation season. The aboveground biomass was determined from six samples taken in the inflow and outflow part of the vegetated bed, respectively. The belowground biomass was determined from two samples taken in the inflow part and two samples taken in the outflow part. The mean total aboveground biomass (estimated in August 2007) was 1296 g.m-2 and 1105 g.m-2 in the inflow and outflow part, respectively. The mean live belowground biomass was 1729 g.m-2 and 2161 g.m-2 in the inflow and outflow part, respectively.
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Below-ground biomass of \kur{Carex acuta} in a graminoid wetland
NEŠPOR, Marek
This thesis is part of the project GA CR P504 / 11/1151 "The role of plants in the greenhouse gas balance Carex fens". The aim of this thesis is to evaluate the seasonal dynamics of Carex acuta belowground biomass in model grassland wetlands (the "wet meadows") near Třeboň. Belowground biomass of C. acuta L. was sampled using the destructive method. The samples were taken on four dates in 2014. On each date, three hummocks of C. acuta and three soil samples in their immediate vicinity were sampled on each date. Live roots had a greater dry weight than decaying roots on all sampling dates. Their total dry weight varied slightly, depending on season. The ratio of live roots to decaying roots did not differ much. The weight of live roots in hummock was almost always higher than that of the dead ones. The dry weight of living roots was always greater in the hummock than below it. Their total weight varied slightly during the year. Aquatic roots formed only a small part of the dry weight of live roots in hummocks. A greater total belowground dry weight found on 21st December 2014, in comparison with 5th August 2014, was associated with a greater amount of rhizomes of other plant species. The shoots increased their dry weight during the year. Maximum weight of tillers was recorded on 8th August 2014. There were no dead shoots on 25th March 2014. Dry weights of dead tillers were largely similar throughout the year. The volumetric soil water content (%) was usually higher in the upper soil layers. The bulk density of the soil was almost identical on all sampling sites, except for the top layer on site 1, where it was considerably lower.
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Below-ground biomass of the common reed (Phragmites australis) in a constructed wetland used for wastewater treatment
MOULISOVÁ, Lenka
My thesis is a part of the project GACR 206/06/0058 Monitoring of selected heavy metals and risk elements in a wastewater cleaning process in artificial wetlands. The goal is to evaluate temporal and spatial variability of underground biomass of Phragmites australis in the artificial wetland used for wastewater treatment in Slavošovice. The destructive method was used for the sampling. The aboveground biomass was determined from six samples taken at the inflow and six samples at the outflow. The belowground biomass (in 2008) was estimated from two samples taken at the inflow and two samples at the outflow. In 2009, the belowground biomass was determined from six samples taken from the inflow and six samples from the outflow. The analysis of the root structure was determined from 12 samples collected at the inflow and 12 samples of the outflow. The mean total aboveground biomass reached 1039 g.m-2 at the inflow and the 1749 g.m-2 at the outflow. Average total belowground biomass in 2009 reached the inflow 1718 g.m-2 and 1562 g.m-2 at the outflow. The average total length of roots growing from one node to was 284,7 m.m-2 and 324,9 m.m-2 in the inflow and outflow part, respectively. Average specific root length of the inflow was 2589,5 cm.g-1 and the outflow 2956,9 cm.g-1. The average total length of roots reaching the inflow of two kilometers and three kilometers of inflow.
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Floristic research in the basin of Pozdeňský and Bilíchovský creeks of Slánsko
BERANOVÁ, Hana
ANNOTATION Hana Beranová University of south Bohemia in České Budějovice {--} Faculty of education {--} department of biology Course: M7504 Teacher for grammar schools Fields of study: Teaching of biology, Teaching of chemistry Floristic research of catchment area of Pozdeň stream and Bílichov stream round Slaný Diploma thesis 2008 The study deals with a description of vegetation of catchment area of Bakov stream and Zlonice stream. In title of study are used the names Pozdeň stream and Bílichov stream, but it{\crq}s only local description. The search had been realised during the vegetation seasons of the years 2006 and 2007. There are characterised geological-petrographical, soil, climatic, hydrographic ratios and basic phytogeographical characteristics of this area in the form of a search. Selected genera of the observed plants are characterised and their incidence is figured in the schematic map of the area. There were found out 299 genera of plants, from which there are 48 stated in the Červený a černý seznam cévnatých rostlin České republiky (stav v roce 2000) (Procházka F. (ed.), 2001). There are described locations of important genera of plants. In discussion of the thesis are described factors, which influence the incidence of some genera of plants. In the annex there are attached schematic maps with places of occurence of the plant genera and photographic documentation. Head of the diploma thesis: Mgr. Rostislav Černý, CSc.
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