Czech Phycology, 2002 (vol. 2), issue 1
Review of the European Microcystis morphospecies (Cyanoprokaryotes) from nature.
Jiří Komárek, Jaroslava Komárková
Czech Phycology 2: 1-24, 2002 
Phytoplankton of 51 fishponds and reservoirs of the Central and Northern Moravia were studied from August to September 2001. Selected ecological parameters were measured in situ (temperature, pH, conductivity, oxygen content). High distribution of Planktothrix agardhii and Anabaena spp. was found, other cyanobacteria were less represented.
Planktonní sinice střední a severní Moravy
Petr Hašler, Aloisie Poulíčková
Czech Phycology 2: 25-32, 2002
Phytoplankton of 51 fishponds and reservoirs of the Central and Northern Moravia were studied from August to September 2001. Selected ecological parameters were measured in situ (temperature, pH, conductivity, oxygen content). High distribution of Planktothrix agardhii and Anabaena spp. was found, other cyanobacteria were less represented.
Pseudodendromonas vlkii (VLK) BOURRELLY - a taxonomic wanderer [in Czech]
Sylvie Nováková
Czech Phycology 2: 33-37, 2002
A colourless flagellate Pseudodendromonas vlkii had been initially classified as a chrysophyte, than it was considered to be a haptophyte and recently it has been assigned to the protozoan class Zoomastigophorea. This species was repeatedly found in the mires of the Krkonoše Mts. The ultrastructure of the scales and the morphology in light and electron microscopes were observed. Its ecology was also studied and compared with previously published papers. P. vlkii appears to be an acidophilic and psychrophilic species.
The cell wall of green alga Lagerheimia aff. subsalsa [in Czech]
KALINA, T.
Czech Phycology 2: 39-42, 2002
Empty cell wall remnants of Lagerheimia aff. subsalsa were observed in phytoplankton sample taken in Baška reservoir near the town Frýdek-Místek (Ostrava region, Northern Moravia). The samples were collected using the plankton net (40x40 mm). Only the water passing through the net was used. Subsequently, 100 ml of the sample were filtered again, using the nitro-cellulose filter with 2.5 mm pores. The amorphous components of the cell wall remnants were naturally removed and no additional cleaning procedure was applied. The chromium shadowed tem preparation was made from diluted sediment. in cell remnants, opposite poles of the cell...
An easy method for light microscopic distinguishing of xanthophycean and eustigmatophycean strains
Jiří Neustupa
Czech Phycology 2: 43-46, 2002
The paper presents a method of selective fuchsin-based cell wall staining distinguishing xanthophycean and eustigmatophycean species. The members of xanthophyceae exhibit distinct positive reaction, whereas eustigmatophycean strains remain unstained. The method could be useful in the distinguishing of living populations of the species of both classes.
Algae from aquatic, peat bog and aerial biotopes in the catchment area of the river Křemelná in Šumava National Park
Jiří Neustupa, Sylvie Nováková, Lenka Šejnohová, Pavel Škaloud, Magda Řezáčová
Czech Phycology 2: 47-60, 2002
The paper reports on algae found in the catchment area of the river Křemelná. In total, 100 species were determined. The main attention was paid to silica scaled chrysophytes, xanthophytes, and some genera of green algae. Morphological and ecological remarks to some species are included.
Didymosphenia geminata a Gomphonema ventricosum (Bacillariophyceae) v Moravskoslezských Beskydech (Didymosphenia geminata and Gomphonema ventricosum (Bacillariophyceae) in Moravskoslezské Beskydy Mts.) [in Czech]
Kateřina Gágyorová, Petr Marvan
Czech Phycology 2: 61-68, 2002
Didymosphenia geminata (LYNGB.) M.SCHMIDT, a rare boreo-alpine diatom, was found to form bulky epilithic growths in the Morávka River below the Morávka drinking water dam reservoir at approx. 480 m altitude. This is a further locality of this species known from the Carpathians and the first one on the territory of the Czech Republic. Permanent low water tempe-rature together with local nutrient enrichment below the dam are supposed to have supported its luxuriant development. Gomphonema ventricosum GREG., a further boreo-alpine diatom of restricted distribution in Central European mountains, appears to belong to...
Contribution to the knowledge of algae from the wetlands of Poleski National Park (East Poland)
Alena Kočárková, Petr Hekera, Martin Rulík
Czech Phycology 2: 69-74, 2002
The research of algae of Polesie National Park in east Poland was carried out in July 1999. Wide spectrum of habitats was studied, including peatbogs, artificial bog lakes ("torfianki"), lakes, small pools and fishponds. The studies were focused especially on Euglenophyta; 23 species of this group were found.
Algae as co-creators of their own environment [in Czech]
David Pithart
Czech Phycology 2: 75-82, 2002
Story of plankton seasonal course in small pond priest pot in NW England is taken as an example of self-structuration of vertically stratified lake ecosystem. From spring to the end of summer, the stratification enhances, species diversity increases. Rather than competition for existing niches, niches are co-created by organisms themselves - by changing their micro - environment. Positive feedback: more complex structure - more niches - higher biodiversity - more complex structure is evident. So-called a-biotic gradients in vertical water column are produced and maintained by permanent life activity of organisms.
Periphyton composition change along the phosphorus gradient in the Florida Everglades [in Czech]
Jan Vymazal, Jaroslava Komárková, Klára Kubečková, Jan Kaštovský
Czech Phycology 2: 83-92, 2002
Water Conservation Area 2A of the northern Everglades is the remnant of the vast sawgrass slough marsh that once stretched from Lake Okeechobee to the southern tip of Florida peninsula. WCA-2A covers an area of 450 km2 and is surrounded by dikes. Water draining from agricultural areas in the Hillsboro Canal is periodically allowed to flow into WCA-2A through four water control gates on the northeast side. WCA-2A is periodically drained through gates on the southern side. These inputs of nutrient-laden water through the control gates for over 25 years have created a nutrient enrichment gradient in WCA-2A extending roughly north-to-south for 3-5 kilometres....
Periphyton in constructed wetlands designed for phosphorus removal in the Florida Everglades [in Czech]
Jan Vymazal
Czech Phycology 2: 93-100, 2002
Everglades Forever Act of 1994 requires that water released from the Everglades Agricultural Area (EAA), south to the Water Conservation Areas (WCAs), meet a total phosphorus (TP) treshold discharge limit that protects the natural ecosystem of the remaining Everglades. To fulfill this requirement over 16 000 m2 of macrophyte-based stormwater treatment areas (STAs) were designed and constructed. These wetland marshes are designed to reduce concentrations of TP in waters released from the EAA to the WCAs to comply with an interim standard of 50 mg,l-1. However, it has been found hat this interim TP standard may not be low enough to prevent alteration...
Algological research of gravel pits Moravičany - Mohelnice (Protected Landscape Area Litovelské Pomoraví) - preliminary results [in Czech]
Olga Skácelová
Czech Phycology 2: 101-106, 2002
Gravel-pit lakes, fragments of natural wetlands, and other marshes situated on the right bank of the River Morava near Mohelnice (Protected Landscape Area Litovelské Pomoraví) were studied to recognize present algal flora. Large oligotrophic gravel-pit lakes are colonized namely with diatomal and cyanobacterial phytoplankton. Periphyton is poor because of the absence of litoral zone. More interesting microflora was found in shallow water habitats, both in original reed communities, and new pools and shores with sediments from technological process of gravel washing.
Toxicological testing of high-salinity samples [in Czech]
Andrej Švagr, Vladimír Kočí, Tomáš Rakovický
Czech Phycology 2: 107-113, 2002
The paper deals with the effect of high salinity on toxicity tests evaluation. In the Czech Republic, there is no legislation to adjust it. However, the question is whether it is needed and if so, which estuarine or marine organisms (algae) would be the most appropriate indicators. Further, species from high-salinity water bodies of arid regions are discussed, as well as a standard marine bioassay (ISO 10253).
Changes of the trophic potential and chlorophyll a content in the River Jihlava, and Dalešice-Mohelno Reservoirs since the infilling [in Czech]
Zdeňka Žáková
Czech Phycology 2: 115-124, 2002
Long-term monitoring of the trophic potential and chlorophyll a content in the River Jihlava upstream and downstream the Dalešice - Mohelno System of Reservoirs and in both reservoirs (1977-2000) showed that the phytoplankton growth in the reservoirs was influenced by mineral nutrients input and their concentration in the cooling towers of Dukovany Nuclear Power Plant and by the repumping operation of the hydroeletric power plant. There were high phytoplankton input from the River Jihlava basin into Dalešice Reservoir and a substantial decrease in phytoplankton quantity downstream the reservoirs.
Computerized processing and archiving of data in a bioassay [in Czech]
Jana Kvíderová
Czech Phycology 2: 125-128, 2002
This article focuses on a passive method of environmental sampling - semipermeable membrane device (SPMD). A sensitivity of algal bioassays for evaluation of SPMD in comparison to the test on photobacteria Vibrio fischeri was examined. We found that the sensitivity of algal bioassay was higher. Moreover, algal bioassay can better differentiate dialysates exposed to toxic and nontoxic conditions.
Application of algal bioassays for toxicity evaluation of SPMD [in Czech]
Vladimír Kočí, Martin Mlejnek, Tomáš Ocelka, Lucie Kochánková
Czech Phycology 2: 129-137, 2002
This article focuses on a passive method of environmental sampling – semipermeable membrane device (SPMD). A sensitivity of algal bioassays for evaluation of SPMD in comparison to the test on photobacteria Vibrio fischeri was examined. We found that the sensitivity of algal bioassay was higher. More over, algal bioassay can better differentiate dialysates exposed to toxic and nontoxic conditions.
Statistical evaluation of algal toxicity bioassays [in Czech]
Vladimír Kočí, Martin Mlejnek, Jiří Burkhard
Czech Phycology 2: 139-142, 2002
The article deals with the problems of statistical presentation of algal toxicity tests. We performed 12 and 10 parallel cultivations of algal suspensions in standard condition for toxicity assays. We suggest that the deviation up to 15%. determined by Probit analysis is not fully adequate for determination of EC50 for algal bioassays. Log-Lin linear regression fits better for experimental data. Only concentrations with inhibition effects from 20% to approximately 80% are recommended for calculation. For NOEC we recommend to choose the highest tested concentration with inhibition effect under 20%. Consequently, the next higher concentration with inhibition...