Littoral algae of Alpine lakes near Salzburg [in Czech]

POULÍČKOVÁ, A. & DOKULIL, M.

Czech Phycology 1: i, 2001

The origin of chloroplasts and the position of eukaryotic algae in the six- kingdom system of life [in Czech]

Tomáš Kalina

Czech Phycology 1: 1-4, 2001  

Symbiosis represents a widely distributed principle of mutual relationships among organisms, belonging to different systematic groups. The cell endosymbiosis is considered to be the most important event, which starts the evolution of all eukaryotic organisms. We recognize about five successful endosymbioses. Some of them resulted in obtaining mitochondria the peroxisomes, perhaps derived from different groups of bacterial ancestors. The special interest represents the origin of the chloroplasts. As it was suggested using the molecular methods, the single-celled cyanobacteria were the ancestors of chloroplasts in glaucophytes, red and green algae. All...

Review of the cyanoprokaryotic genus Romeria

Jiří Komárek

Czech Phycology 1: 5-19, 2001  

The cyanoprokaryotic genus Romeria is traditionally classified as the simplest filamentous cyanobacterium, occurring scarcely in freshwater reservoirs. Three species were described originally, which are known from the temperate zone, and which are usually cited in all identification manuals of this cyanoprokaryotic group. However, other species were found recently, also in other biotopes (benthos, cryoseston, marine plankton), and now the number of registered species increased to 19. The problem is, that they were not yet isolated in culture, and nothing is known about ultrastructure and molecular characters of any Romeria species. Recently,...

Cyanobacteria of several wells in Brno surroundings [in Czech]

Bohuslav Uher, Olga Skácelová, Ľubomír Kováčik

Czech Phycology 1: 21-30, 2001  

Wet stones near the wells form a specific microhabitat for the occurrence of epilithic, benthic and epiphytic cyanobacteria and algae. In four wells (Prosba lesa, U sovy, Čertík, U památníku letců) 15 little known cyanobacteria species (namely from the group of Chroococcales) were identified. These microhabitats belong to oligosaprobic water sites.

Aerophytic algae from the tropical rainforests of Peninsular Malaysia

Jiří Neustupa

Czech Phycology 1: 31-35, 2001  

A preliminary floristic survey of aerophytic epiphytic algae from lowland tropical rainforests of Peninsular Malaysia is presented. The algal communities are either dominated by filamentous cyanophytes (e.g. Scytonema, Stigonema) or green algae of the family Trentepohliaceae. As concomitant species of Trentepohliaceae-dominated communities the coccal and filamentous green algae were frequently observed. In cyanophytes-dominated samples green algae were rarely recovered. In many recorded species the determination up to the species level has not been possible. Some of the isolated strains will be described as new taxa in future....

Algal species composition of pools in the Litovelské Pomoraví Protected Landscape Area [in Czech]

Alena Kočárková, Aloisie Poulíčková

Czech Phycology 1: 37-44, 2001  

The species composition of phytoplankton in several pools in the Litovelské Pomoraví Protected Landscape Area and the physical and chemical conditions of pools were studied from 1996 to 1997. Approximately 200 taxa of algae and blue-green algae were identified. Euglenophyta was diverse and dominant group; especially Euglena hemichromata, E. spirogyra, Trachelomonas volvocina, Phacus orbicularis and P. pleuronectes occurred in samples regularly. The mass occurrence of Hydrodictyon reticulatum were observed in one of these pools.

Seasonal dynamic of the phytoplankton in two fishponds near Protivanov (Moravia, Czech Republic) [in Czech]

Miloslav Kitner, Aloisie Poulíčková

Czech Phycology 1: 45-51, 2001  

The contribution presents the results of the first investigation of phytoplankton in the district of Prostějov. During 1998 - 1999 seasonal changes of phytoplankton in two fishponds together with selected physical and chemical parameters (temperature, oxygen, pH, conductivity, nutrients and heavy metals) were ivestigated. Eutrophication of the investigated fishponds is not as high as in other regions in the Czech Republic.

Phytoplankton of gravel-pit Chomoutov near Olomouc

Marek Navrátil, Aloisie Poulíčková

Czech Phycology 1: 53-61, 2001  

The seasonal changes of phytoplankton and selected ecological parameters (temperature, pH, oxygen, conductivity, nutrients) were studied in the years 1998 and 1999 at gravel-pit Chomoutov (Olomouc, the Czech Republic). Long-term changes in the species composition and proportions of the main algal groups during last three decades are discussed. Subsequent eutrophication was found with the come back of water blooms of Aphanizomenon flos-aquae.

Diatom flora of the springs on the borderline between Moravia and Slovakia I. Northeastern part of the territory [in Czech]

Aloisie Poulíčková, Kateřina Bogdanová, Petr Hekera, Petra Hájková

Czech Phycology 1: 63-68, 2001  

Diatoms were studied in 29 spring fens of the West Carpathians. A total of 70 diatom taxa were found. Caloneis tenuis, Eunotia paludosa, E. steineckii, Navicula cryptocephala, Nitzschia archibaldii, Rhopalodia gibba and R. rupestris were the most frequent species. The sites with low pH (3,6 - 6,5) can be characterized by the occurrence of genera Anomoeoneis, Eunotia, Frustulia. On the other hand, Rhopalodia and Diploneis were common at the sites with higher pH (6,4 - 7).

Influence of the Šance Reservoir on the benthic diatoms of the Ostravice River [in Czech]

Pavla Sýkorová, Aloisie Poulíčková

Czech Phycology 1: 69-76, 2001  

This contribution deals with the comparison of several physical and chemical parameters and algae periphyton in the Ostravice River above and below the Šance Reservoir. The Šance Reservoir on the Ostravice River (North Moravia) is a typical deep reservoir with the hypolimnetic outflow during the period of stratification. The reservoir serving as drinking water supply was filled up in 1969. Temperature, pH, conductivity and concentrations of oxygen and nitrogen compounds, as well as the phyto-periphyton changes (focussed on diatoms and assessment of saprobity) were followed in the five profiles on the Ostravice River. Special attention was done on the...

Gradients - basic character of the environment and the possibilities of their simulation in the laboratory [in Czech]

Jana Kvíderová, Jaromír Lukavský

Czech Phycology 1: 77-86, 2001  

In nature, organisms grow in gradients of different conditions. For biochemical, physiological and ultrastuctural studies it is necessary to cultivate the organisms in strictly defined conditions. Cultivations in liquid media or on solid ones allow modelling of gradient of only one condition, usually concentration of a nutrient or a toxic chemical. Cultivation in crossed gradients of temperature and light provides various combinations of different values of temperatures and irradiances. A new unit for crossed gradients is commercially available and its properties are characterised here.

Toxicity of heavy metals on algae [in Czech]

CEPÁK, V., FURNADZIEVA, S. & LUKAVSKÝ, J.

Czech Phycology 1: 87-91, 2001  

abstrakt chybi DOPLNIT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Algae and blue-green algae as mosquito food [in Czech]

František Rettich, Jiří Popovský, Vladimír Cepák

Czech Phycology 1: 93-101, 2001  

Ten genera of cyanophytes and 73 genera of algae were found in the guts of Aedes, Culex, Anopheles and Culiseta larvae collected in various breeding places of the Elbe-Lowland (Bohemia) and Prague. The quality and quantity of blue-green algae and algae found in mosquito guts depended on their presence in the water of mosquito breeding places and on the feeding type (filter fieders, scrapers) of mosquito larvae. Chlorophycean algae possesing cell wall with sporopollenin and algae with a mucilagenous (jelly) envelope appeared undamaged by the digestive process. Also spores and resting stages tended to pass undamaged through...

Study on indigestibility and digestibility of cyanophytes by mosquito larvae using fluorochrome DAPI [in Czech]

Vladislav Cepák, František Rettich

Czech Phycology 1: 102-106, 2001  

DAPI fluorescent staining was used to record cytomorphological changes in cyanophytes during the process of digestion by some mosquito larvae. Control cells were red due to fluorescence of chlorophyll and DNA structures (nucleoids) stained with DAPI emitted strong bluish light. Morphology of Cyanothece, Cyanobacterium, Merismopedia, and all Synechococcus strains dramatically changed along the gut. In the foregut, cells did not apparently differ from control. In the hindgut however, no chlorophyll fluorescence was observed, cells exhibited weakly bluish or yellowish fluorescence (typical for dead cells) and no DNA material or polyphosphate...

Trophic potential of water - comparison of two methods [in Czech]

Zdeňka Žáková, Hana Mlejnková

Czech Phycology 1: 107-112, 2001  

Two methods (new miniaturized method according to TNV 757741 and standard method were compared. The new method was found comparable with several advantages. The older method can be replaced by the new one without problems or both of them can be used for the same purpose.

Qualitative analysis of cyanobacteria in interlaboratory comparison test [in Czech]

Petr Pumann

Czech Phycology 1: 113-120, 2001  

Interlaboratory comparison method for identification of cyanobacteria is proposed. Formalin preserved samples of water blooms or samples collected with plankton net were determined using light microscope. The correct identification of dominant species in each sample was evaluated according to the simple point system. Advantages and disadvantages of this method are summarized.

Statistical questionmarks of the algal bioassays [in Czech]

Vladimír Kočí

Czech Phycology 1: 121-127, 2001  

The article focuses on statistical evaluation of algal bioassays. Statistical determination of EC50 and determination of low effect concentration is a very important part of presentation of ecotoxicological experiments. The question is, what is NOEC and LOEC in algal bioassay. The paper discusses the question how large difference between the sample and control algal growth should be considered as important. How large differences of algal growth in comparison to control means there is no important difference?

Ekotoxicological evaluation of the stream profile Most - Bílina [in Czech]

Jana Ambrožová

Czech Phycology 1: 129-140, 2001  

The investigation is aimed at re-cultivation in the area of the Krušné Hory (Krušné Mountains) in the Czech Republic. In this area, mainly in the town of Most region, there are many coal mines. The re-cultivation by inundation has been used since 1998. In this paper, the toxicity of the Bílina River profile is evaluated and the possible influence of water and sediment quality on biological revival is assessed. Three types of samples were tested - water from the river profile, black mud with oil products odour and sand from the stream center line. These samples were tested by standard acute toxicity tests on green alga Scenedesmus quadricauda...