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Primary algologic research in basin of Křemžký potok.
VYŽRALOVÁ, Anna
Area of my research was Křemžský potok and ponds in its environs. Křemžský potok situating in Blanský les is being got dirty over time. Polluting influences are caused by villages, which through the stream is flowing. Thereafter a watter in stream is polluted by sewage disposal plant and its tributaries. I found in environs of Křemžský potok and ponds many typical species for this country.
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Floristic study of cyanobacteria and algae in south-east part of Vysočina region
MELICHAR, Antonín
The phytoplankton samples from 45 localities in Vysočina region were collected in 2009. Species composition and relative abundance of species were studied; ecological factors like pH, conductivity, temperature, water transparency and dissolved ions were measured. Ecological indices (Shannon and Simpson index of diversity) were calculated and compared with other ecological factors. Checklist of all species present in Vysočina region was made. There were found 262 species and 4 species new for the Czech Republic.
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The rearing of fry of vimba bream (Vimba vimba) under controlled conditions by using various feeding
BENEDIKT, Pavel
The feeding experiment was performed with fry of vimba bream (Vimba vimba) during the first 24 days from the beginning of exogenous nutrition. Six diets were used: algae (Chlorella vulgaris), starter fodder BioOptimal 0,8 mm by Biomar company ? for cyprinids, live nauplii of Artemia salina, combination of alga and starter fodder BioOptimal, combination of alga and nauplii of Artemia salina, combination of starter fodder BioOptimal and nauplii of Artemia salina. Individual weight, total lenght, survival rate of larvae, specific growth rate (SGR) and conditions of the fry (condition coefficient according to Fulton ? FWC) were observed during the experiment. The results were compared statistically using the method of one ? way analysis of variance (ANOVA ? = 0,05; Microsoft Excel).
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Photoautotrophic microorganisms in the glacial ecosystem of Svalbard, high Arctic
STIBAL, Marek
Photoautotrophic microorganisms, i.e. cyanobacteria and microalgae, are ubiquitous in the glacial ecosystem of the high Arctic archipelago of Svalbard. Their communities play significant roles in the ecosystem, including organic carbon production on the glacier surface and its supply to downstream environments, initiating microbial colonisation after glacier retreat and preparing proglacial substrata for further succession.
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Euglenophytes of the Czech Republic in view of South Bohemia and the Bohemian Forest
JURÁŇ, Josef
A list of photosynthetic euglenoids of the Czech Republic was made from works about algal flora of the Czech Republic and this list was confronted with similar works from the Slovak Republic, Poland, Romania, Ukraine and Slovenia. Following the literature about algae from South Bohemia and the Bohemian Forest a checklist of photosynthetic euglenoids from this area was compiled. Data from this list were completed by my samples from this area. There were found 2 taxons new for the Czech Republic and 3 taxons new for South Bohemia and the Bohemia Forest.
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The algae of water basins i Novohradské hory
PLOCOVÁ, Alena
This thesis deals with six ponds, artificial snall lakes, (Mlýnský, Huťský, Pohořský, Uhlišťský rybník, Zlatá Ktiš a Kapelung) in the Novohradské mountains. They were studied at the interval of years 2004-2006. The basic hydrochemistries and variety of species of planktonic Algae and Cyanobacteria were analysed there. The volume of NH4-N was the highest in Mlýnský pond (20-76 ?g/l), which proves for a recent organic pollution. In other cases the rate was in range of 13-53 ?g/l. The most of NO2-N was again found in Mlýnský pond where its rate reached up to 420 ?g/l. The total amount of t-P was of the same rate in all the sites. It differed only slightly- 58-91 ?g/l. From the hydrochemical data follows that the most nutrients loaded is Mlýnský pond and the cleanest is Pohořský one The transparency (Seccki depth) of all the localities is also high (76-200 cm). It can be compared to the lakes of the Bavarian Forrest and the Bohemia Forest (Šumava). The proportion of N/P is usually between 7,0-29,8 (Chart 11), which shows evidence of limiting P (the most common limiting factor for phytoplankton in fresh waters). The total amount of found taxa (98) is comparable to e.g. lakes of the Bohemia Forest (260), this ara is however more explored. The largest amount of species is at Huťský pond (38) and the smallest one is at Uhlišťský pond (17). As a new species for the the Czech Republik was found Staurastrum arctiscon and Phaeospaera gelatinosa, than another interesting discovery is Vacuolaria penardii and Chloromonas nivalis (Scotiella nivalis). Also Dicranochaete sp. and Paulinella chromatophora are noticeable. The ponds of the Novohradské mountains are from the point ob view of hydrochemistry view unigue habitats. They make for refugium oligotrophic, rare and interesting species of Cyanobacteria and Algea and that is why they deserve proper protection.
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Interactions between the soil micro-flora and invertebrates in Slovak and Moravian caves
Lukešová, Alena ; Nováková, Alena
The role of microflora as food for soil invertebrates is well documented. However, data on interactions between communities of organisms living in caves are very limited. Three caves of the Slovak Karst NP (Domica Cave, Dlhá Chodba Cave, Ardovská Cave) and the Amatérská Cave (Moravian Karst) were selected for this study because from visual observations, it was clear that there was some invertebrate activity. The aim of the study was to compare the communities of algae, cyanobacteria and microscopic fungi developing in excrements of cave invertebrates and in the surrounding cave sediment. The richest communities of both algae and microfungi were found in earthworm casts, containing up to two fold more species than in the surrounding sediment (73 species of microscopic fungi in the casts compared to 37 in surrounding cave sediment in the Domica Cave, and 45 vs. 27 species of algae in the Dlhá Chodba Cave).
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Microscopic fungi as food of cave invertebrate animals - a laboratory food preference experiment
Nováková, Alena ; Luptáčik, P. ; Kováč, L. ; Lukešová, Alena ; Šustr, Vladimír
The aim was to improve the methodology of the multi-choice food preference tests as a tool for investigation of feeding preference of cave invertebrates. Fungi and algae isolated from cave sediments of the Domica Cave system (NP Slovak Karst) were offered in cafeteria tests as a food to springtail .i.Folsomia candida./i., mites .i.Pantelozetes cavatica, Scheloribates pallidulus./i., and isopod .i.Mesoniscus graniger. M. graniger./i. preferred some species of algae, all offered fungi were rejected. Mainly algae and .i.Mucor./i. spp. from microscopic fungi are preferred by .i.S. pallidulus./i.. Preference of .i.Mucor./i. spp. was observed by cave mite .i.P. cavatica./i. and cave population of .i.F. candida./i. too. All cave animals showed low preference for offered food and have tendency to stay rather on clay cave sediment then on the food.
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Potravní zdroje bezobratlých v Ardovské jeskyni a v jeskyni Domica - předběžné výsledky
Nováková, Alena ; Elhottová, Dana ; Krištůfek, Václav ; Lukešová, Alena ; Hill, P. ; Kováč, L. ; Mock, A. ; Luptáčik, P.
The chemistry (organic matter content and pH) of different substrates from the Ardovská and Domica Caves in the Slovak Karst National Park (Slovakia) and the composition of their microbial communities were studied. Differences in organic matter content and microbial communities were found between the substrates from the Domica and Ardovská Caves. A broad spectrum of photoautotrophic microorganisms (algae and cyanobacteria) was found in different cave microhabitats (cave sediment, rotten wood, earthworms casts and isopods faeces), but no algae were detected in the fresh bat droppings and in the intestinal tract of the isopod .i.M. graniger./i.. Microfungi and bacterial colonies play the primary role in transforming bat guano into a food source for saprophagous and microphytophagous invertebrates.
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