Fottea 7, Number 1
REVIEW
KOMÁREK, J. & ZAPOMĚLOVÁ, E.: Planktic morphospecies of the cyanobacterial genus Anabaena = subg. Dolichospermum – 1. part: coiled types. - Fottea 7(1): 1–31, 2007
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UHER, B.: Morphological characterization of three subaerial Calothrix species (Nostocales, Cyanobacteria). - Fottea 7(1): 33–38, 2007
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SHORT NOTE
DVOŘÁK, P. & HAŠLER, P.: Occurrence and morphological variability of Cylindrospermopsis raciborskii (WOLOSZ.) SEENAYYA et SUBBA RAJU (Cyanophyta, Nostocales) near Olomouc in 2006. - Fottea 7(1): 39–42, 2007
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PICHRTOVÁ, M., ŘEZÁČOVÁ-ŠKALOUDOVÁ, M. & ŠKALOUD, P.: The silica-scaled chrysophytes of the Czech-Moravian Highlands. - Fottea 7(1): 43–48, 2007
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HAŠLER, P., HINDÁK, F. & HINDÁKOVÁ, A.: Phytoplankton of the Morava and Dyje Rivers in spring and summer 2006. - Fottea 7(1): 49–68, 2007
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LYSÁKOVÁ, M., KITNER, M. & POULÍČKOVÁ, A.: The epipelic algae of fishponds of Central and Northern Moravia (The Czech Republic). Fottea 7(1): 69–75, 2007
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BUCZKÓ, K.: The occurrence of the epiphytic diatom Lemnicola hungarica on different European Lemnaceae species. - Fottea 7(1): 77–85, 2007
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KOMÁREK, J. & ZAPOMĚLOVÁ, E.: Planktic morphospecies of the cyanobacterial genus Anabaena = subg. Dolichospermum – 1. part: coiled types.
The traditional cyanobacterial genus Anabaena contains several groups of morphospecies, which should be classified in different genera according to modern phenotypic and molecular criteria. The separation into several clusters was confirmed by 16S rRNA sequencing. The generic name Anabaena must be maintained for the benthic species without gas vesicles, the type species of which is Anabaena oscillarioides. The planktic types are divided also in several subclusters; one of them can be provisionally designated as subg. Dolichospermum THW. ex WITTR. et NORDST. 1889 with the type species Anabaena flos-aquae [LYNGB.] BRÉB. ex BORN. et FLAH. 1888. The taxonomy of this cluster, which contains types with coiled as well as straight filaments, is not yet satisfactory solved. The interspecific features are particularly problematic. However, the review of stable coiled morphotypes from the subg. Dolichospermum which aree known and repeatedly occur in natural populations, is presented in this article. This review should help to the orientation of phenotype diversity of coiled Dolichospermum-types, especially in populations occurring in natural habitats.
UHER, B.: Morphological characterization of three subaerial Calothrix species (Nostocales, Cyanobacteria).
This paper characterizes and discusses the concept of species Calothrix braunii, C. capitularis spec. nova and C. parietina which were identified on subaerial rocky substrates in gorges of the Slovenský raj National Park in Slovakia. In this paper, we focused on phenotypic characters, i.e. natural and cultural morphological variability. Their variable and stabile phenotypic markers are discussed.
DVOŘÁK, P. & HAŠLER, P.: Occurrence and morphological variability of Cylindrospermopsis raciborskii (WOLOSZ.) SEENAYYA et SUBBA RAJU (Cyanophyta, Nostocales) near Olomouc in 2006.
The presented paper focuses on the occurrence and variability of one of the most problematic cyanobacterium all over the world – Cylindrospermopsis raciborskii, which has occurred near Olomouc again after thirty years. We found the species in a small dead arm of the Morava River and collected samples of phytoplankton from summer to late autumn. We studied both living as well as preserved samples and
documented variability of the species by drawings and microphotographs. The obtained data are discussed with relevant literature.
PICHRTOVÁ, M., ŘEZÁČOVÁ-ŠKALOUDOVÁ, M. & ŠKALOUD, M.: The silica-scaled chrysophytes of the Czech-Moravian Highlands.
Silica-scaled chrysophytes were studied in the region of the Czech-Moravian Highlands. A total of 40 taxa were found. Species Paraphysomonas butcheri was recorded for the first time from the territory of the Czech Republic. Synura petersenii was the most abundant species. The composition of the flora is typical of
vernal phytoplankton.
HAŠLER, P., HINDÁK, F. & HINDÁKOVÁ, A.: Phytoplankton of the Morava and Dyje Rivers in spring and summer 2006.
Species composition and abundance of the phytoplankton of the Morava and Dyje Rivers are evaluated. Samples were collected at Olomouc, Lanžhot, Devín (the Morava River) and at Pohansko (the Dyje River) in May and August 2006. Both concentrated samples using plankton net and free water were taken at each sampling point. Environmental variables such as pH, temperature, conductivity and dissolved oxygen were also measured. Altogether 542 species and infraspecific taxa of cyanobacteria and algae were identified. Collected data of diversity and abundance were statistically analyzed using NCSS software and Canoco for Windows. Significant differences between sampling sites and sampling time were observed. A complete list of species found at investigated sites is supplied.
LYSÁKOVÁ, M., KITNER, M. & POULÍČKOVÁ, A.: The epipelic algae of fishponds of Central and Northern Moravia (The Czech Republic).
Epipelic assemblages have not been studied in the Czech Republic yet. The sampling method following Round (1953) was used for the fist time in the Czech Republic. The epipelic assemblages were dominated by diatoms, particularly in mesotrophic and meso-eutrophic fishponds, eutrophic fishponds were dominated by green algae and cyanobacteria. A total of 130 diatom species were found in 16 fishponds, their list with trophic preferences is presented. Seven morphospecies were distinquished within Sellaphora pupula species complex, their clonal cultures will be studied later by molecular methods.
BUCZKÓ, K.: The occurrence of the epiphytic diatom Lemnicola hungarica on different European Lemnaceae species.
The substrate specificity of Lemnicola hungarica (Grunow) Round et P.W. Basson was studied on five Lemnaceae species using material from the Herbarium Generale of the Hungarian Natural History Museum. Diatom assemblages inhabiting Lemna minor, Lemna gibba, Spirodela polyrhiza and Wolffia arrhiza were dominated by Lemnicola hungarica, in contrast to assembladges on Lemna trisulca dominated by Cocconeis placentula. An initial or post-initial cell of Lemnicola hungarica has been found in the studied material.