Czech Phycology, 2006 (vol. 6), issue 1
Diversity of Aphanizomenon-like cyanobacteria
Jiří Komárek, Jaroslava Komárková
Czech Phycology 6: 1-32, 2006 
The cyanobacterial filamentous, heterocytous and planktic genus Aphanizomenon is heterogeneous according to both, molecular and morphological criteria. Using combined "polyphasic" method for evaluation of its natural diversity, the close genetic relation to planktic Anabaena was recognised. However, the different clusters within the genus Aphanizomenon are separated one from another as well as similar subclusters of planktic Anabaena (cf. literature cited). The subclusters are well characterised also according to phenotype markers. In the present review the diversity of the traditional genus Aphanizomenon according to recent...
Current taxonomic issues with planktonic representatives of the genus Anabaena (Cyanobacteria) with special reference to their morphological features; literary review
Eliška Zapomělová
Czech Phycology 6: 33-47, 2006
Planktonic representatives of nostocacean genus Anabaena belong to the group of important water-bloom-forming cyanobacteria. Their populations develop mostly in summertime, especially in eutrophicated water bodies. Hence, they can strongly influence the quality of various kinds of surface waters. For clear identification, unambiguous species definition and a complete knowledge of the range of morphological variability of single morphospecies are necessary.. This review of the literature summarizes studies connected with the taxonomy of the above mentioned cyanobacterial group, mainly with respect to phenotypic features and morphological variability...
The CYATAXO database
Jaroslava Komárková, Jiří Nedoma
Czech Phycology 6: 49-54, 2006
The CYATAXO Database presented here is available on CD, attached to Czech Phycology 6. Our database will help in identification of cyanobacterial morphotypes (morphospecies) forming blue-green blooms. This database focuses on European planktonic cyanobacterial taxa. The database is not a professional one and data are not protected. However, this makes the database flexible and you may choose which records you need, which ones you want to delete, and what you would like to change. Further colleagues provided data, helped with descriptions, photographs etc.: J. Komárek, G. Cronberg, F. Hindák, L. Lepistö, P. Kuupo, P. Znachor, E. Zapomělová, G. Tedioli,...
Diatom Collection of J. Bílý deposited in Moravian Museum, Brno - catalogue of preparation slides [in Czech]
Olga Skácelová, Jitka Konečná
Czech Phycology 6: 55-58, 2006
A list of more than 8 thousand diatom slides from the inheritance of Julius Bílý now on deposit in the Moravian Museum is presented on the attached CD-ROM. J. Bílý (1895-1970), famous Czech diatomologist, is the author of many detailed floristic studies particularly from Moravian saline habitats, but also from other habitats and regions. Searching is possible according to localities, biotopes, regions or taxa named by Bílý on labels. Slides can be loaned to interested scientists. The diatom collection, thanks to the cataloguing, can be used for 1) the study of various types of biotopes, 2) the comparison of the past and present diatom flora, 3) the...
Three planktonic cyanophytes producing water blooms in Western Slovakia
František Hindák
Czech Phycology 6: 59-67, 2006
In recent years, three rare cyanophytes, Microcystis botrys TEILING, M. novacekii (KOMÁREK) COMPÈRE and Radiocystis geminata SKUJA, appeared in great abundance in the plankton of eutrophic lakes and fishponds in Western Slovakia. During the summer they produced or contributed to a massive planktonic water bloom. The two Microcystis species exhibit some similarities with M. aeruginosa but differ by smaller, unperforated colonies with very densely aggregated cells. M. botrys is distinguished from M. novacekii (and from other species of the genus) by semiglobose or tubular gelatinous protuberances in the...
Pleurocapsa cuprea, originally described as blue - green alga, is a eukaryotic alga similar to the species Hildenbrandia rivularis (Rhodophyta)
Lenka Caisová
Czech Phycology 6: 69-76, 2006
An interesting microorganism was found on stones in the Zbirožský potok stream near the village of Skryje (Rakovník region, Czech Republic). The macroscopic algal mats in the form of flat red patches on stones were macroscopically similar to those of Hildenbrandia rivularis (Rhodophyta) growing on stony substrates in freshwater biotopes. However, the identified material in the Zbirožský potok stream differed from H. rivularis in its morphology and also in ecology. It corresponded exactly to Pleurocapsa cuprea described by HANSGIRG (1892). New classification as red alga was confirmed by investigating samples under a fluorescence microscope...
Diversity, abundance and volume biomass of the phytoplankton of the Morava River (Czech Republic, Slovakia) and the Dyje River (Czech Republic) in November 2005
František Hindák, Alica Hindáková, Petr Marvan, Jiří Heteša, Petr Hašler
Czech Phycology 6: 77-97, 2006
Phytoplankton qualitative and quantitative analyses from the upper, middle and lower Morava River stretches and from lowermost Dyje River in November 2005 are presented. In the late autumn phytoplankton samples taken from the Morava in two sampling points in the Czech Republic (Olomouc, Lanžhot), and in one point in Bratislava-Devín, Slovakia, 346 species and infraspecific taxa belonging to 118 genera were determined. The highest number of species (incl. infraspecific taxa) was found in Bacillariophyceae - 153, following by Chlorophyceae - 100. About 19 taxa have not been yet registered in the lowest stretch of the Morava River. Koliella elongata...
Benthic algal communities and their ecology in sandstone periodically desiccated brook in National Park Bohemian Switzerland (Czech Republic)
Jana Veselá
Czech Phycology 6: 99-110, 2006
Investigated pristine forest brook with silica sandstone bedrock periodically dry out during the year. Attached algae from four different habitats (stones, stream bottom, wood and bryophytes) were collected at two sites of the brook. A total number of 48 algal taxa are identified from 24 samples. Most of the identified species are classified as flora of springs and mountain streams, oligotrophic and electrolyt poor waters, aero-terrestric habitats and sandstone or silica rich substrates. Environmental parameters and identified algal taxa with their abundancies in each sample were analysed using the linear multivariate analysis methods. The greatest...
Phytoplankton of the Zámecký Pond
Radovan Kopp
Czech Phycology 6: 111-125, 2006
Current knowledge on the phytoplankton composition of the Zámecký Pond at Lednice (Moravia, Czech Republic) is presented. The pond has become a National Nature Reserve, and its use for fishery is highly limited by the purpose of nature conservation. The fish stock of the studied pond has the greatest influence on the structure and abundance of phytoplankton. Altogether 343 taxa of cyanophytes and algae were found during the whole hydrobiological monitoring.
The effect of colour light on production of zooids in 10 strains of the green chlorococcal alga Scenedesmus obliquus
Vladislav Cepák, Pavel Přibyl
Czech Phycology 6: 127-133, 2006
The effect of lights of different spectral composition on the life cycle of 10 strains of Scenedesmus(Acutodesmus) obliquus (Turp.)Kütz. was studied. Subcultures from synchronous mother culture grown under standard conditions were withdrawn at 0, 4, 8, and 16 hours intervals and the dense cultures exposed in nitrogen free medium, temperature 15°C and various intensities of white, blue, red, or green light. Motile cells were observed only at cultures grown under blue or green light. Their number was independent on light intensity in tested span of irradiances (5, 25 and 50 μmol.m-2) that indicates signal role of blue and green...
Negative photomovements of desmid Micrasterias rotata as response to strong light
Kamila Trojánková, Pavel Přibyl
Czech Phycology 6: 135-142, 2006
We describe two types of photomovement of Micrasterias rotata cells in the presented study. When using relatively high irradiance (145 μmol.m-2.s-1), about 30 % of tested cells reacted by negative phototaxis (gliding) or by rising to avoid strong incident light. No marked responses were recorded under lower irradiance (15 μmol.m-2.s-1) and in the darkness. Alternation of higher and lower irradiances resulted in a rising - laying down cycle. Moreover, light responses of this cycle markedly delayed when repeating irradiances alternation. Thus, for both tested photomovements we have observed primarily...
Applied PUBLIC water supply hydrobiology: A brief review. Problems of the drinking water systems in the Czech Republic
Jana Ambrožová
Czech Phycology 6: 143-148, 2006
Surface waters affected by eutrophication produce more biomass and enable development of organisms which are difficult to remove during the water treatment technology. The increasing numbers of organisms in treated water cause the problems during the treatment process, namely in coagulation and filtration stages. The quality of water has to be controlled and monitored by drinking water suppliers during all stages of the treatment process beginning at the water source until the end of distribution systems. The knowledge of ecological requirements of individual organisms for water quality evaluation, and the impact on biological stability of drinking...