Fottea, 2008 (vol. 8), issue 2

Phylogeny and classification of Zygnematophyceae (Streptophyta): current state of affairs.

Andrey A. Gontcharov

Fottea 8(2): 87-104, 2008 | DOI: 10.5507/fot.2008.004  

Conjugates (Zygnematophyceae) represent the most species-rich (ca. 4000 spp) algal lineage within the Streptophyta. Studies using various molecular markers have placed the class as one of the crown groups in Streptophyta and even suggested a close relationship between the zygnematophycean algae and land plants. Phenotypic diversity complicates systematics of the class and the relationships between its taxa remain poorly understood. Molecular phylogenetic analyses have established a number of clades in the class and revealed a disagreement between the traditional taxonomic structure of Zygnematophyceae and the pattern of phylogenetic relationships between...

Nitella mucronata (Br.) Miquel (Charophyta) in the Czech Republic.

Lenka Caisová, Štěpán Husák, Jiří Komárek

Fottea 8(2): 105-107, 2008 | DOI: 10.5507/fot.2008.005  

Nitella mucronata is designated as "extremly rare species" of Charophyta in the Czech Republic in the recent publication of Husák (2001), where only one locality in South Moravia is cited. Hovewer, according to literary sources and personal experience there exist more of localities of this species in the Czech Republic. Recently (in summer 2007) has been found N. mucronata in peat bog Velká Ohrazenice near a village Doňov near Veselí nad Lužnicí (south Bohemia). It is possible to suppose that this species occurs at other localities in the Czech Republic. All old and recent data about the distribution of this species, detailed description...

A report of Stephanosphaera pluvialis Cohn 1852 (Chlorophyta, Chlamydophyceae).

Jan Kaštovský

Fottea 8(2): 109-110, 2008 | DOI: 10.5507/fot.2008.006  

An interesting and rare alga was found after 43 years in the Czech Republic. This short note focuses on review of localities and morphological evaluation of found population.

Quantitative assessment of morphological variation of six Pseudococcomyxa strains by geometric morphometric descriptors.

Jiří Neustupa, Katarína Nemjová

Fottea 8(2): 111-116, 2008 | DOI: 10.5507/fot.2008.007  

We conducted a geometric morphometric analysis of the cellular shape in six Pseudococcomyxa strains that were isolated from different microhabitats (bark, needles, bare wood) and from different regions. The analysis was based on 14 landmarks, with 12 of them allowed to slide along their abscissae. The size differences did not correlate with ecological characteristics, but the shape descriptors analysis resulted in three distinguished groups: a pair of tropical strains, three strains isolated from spruce needles and a single strain from the fir bare wood. We propose that quantitative shape features of Coccomyxa-like algae could be used...

The genus Sellaphora: an addition and corrections.

David G. Mann

Fottea 8(2): 117-119, 2008 | DOI: 10.5507/fot.2008.008  

Examination of further British specimens of Sellaphora species from Blackford Pond, Edinburgh, revealed that the 'spindle' deme described in a previous paper [D.G. Mann et al. (2008). Fottea 8: 15-78] was incorrectly characterized. Two demes were conflated: true 'spindle' and a further deme referred to here as 'cf. auldreekie'. The cox1 DNA Barcode specified for 'spindle' by Mann et al. (2008) was correct, but was linked to the wrong illustrations and description, which were of 'cf. auldreekie'. These errors and three references to a slide preparation are corrected.

The identity of Sellaphora bacillum (Ehrenberg) D.G. Mann.

Regine Jahn, David G. Mann, Katharine M. Evans, Aloisie Poulíčková

Fottea 8(2): 121-124, 2008 | DOI: 10.5507/fot.2008.009  

A lectotype and epitype are designated for the freshwater epipelic diatom Navicula bacillum Ehrenberg, now generally referred to as Sellaphora bacillum (Ehrenberg) D.G. Mann. The lectotype is an original drawing preserved in the Ehrenberg collection at the Museum für Naturkunde in Berlin, which shows a naviculoid diatom with linear valves and rounded poles. This is consistent with the current concept of S. bacillum and with usage during the last 160 years but the lectotype shows insufficient detail to constrain the use of the epithet it defines. We therefore support the lectotype with an epitype, which is the preserved material...

Distribution of freshwater red algal family Lemaneaceae (Rhodophyta) in the Czech Republic: an update.

Pavel Kučera, Vít Grulich, Markéta Fránková, Petr Bureš

Fottea 8(2): 125-128, 2008 | DOI: 10.5507/fot.2008.010  

Macroscopic red algae of the family Lemaneaceae are reported from several localities in the Czech Republic. Published data are sparse due to difficulty in species identification and little interest in this group of algae in the past. The Lemaneaceae were sampled throughout the Czech Republic. The new localities are reported as follows: 18 for Lemanea fluviatilis and 5 for Paralemanea catenata. Results from this study suggest that L. fluviatilis is widespread and inhabits streams from a wide altitudinal gradient, whereas P. catenata has a more restricted distribution. Lemanea tortulosa appears to be very...

Epilithic cyanobacterial flora of Mohelenská hadcová steppe Nature Reserve (western Moravia, Czech Republic) 70 years ago and now.

Tomáš Hauer

Fottea 8(2): 129-132, 2008 | DOI: 10.5507/fot.2008.011  

The epilithic cyanobacteria are a much less studied group than those cyanobacteria in aquatic habitats. One of the few studies on these organisms, performed within the Czech Republic, was a very comprehensive one by Nováček (1934) which focused on the epilithic cyanobacterial flora of a serpentinic xerotherm area near Mohelno (western Moravia, Czech Republic). This current paper gives information of the current state of these epilithic cyanobacterial communities, as well as comparisons with the historic data.

Epipelic cyanobacteria and algae: a case study from Czech ponds.

Petr Hašler, Jana Štěpánková, Jana Špačková, Jiří Neustupa, Miloslav Kitner, Petr Hekera, Jana Veselá, Jaroslav Burian, Aloisie Poulíčková

Fottea 8(2): 133-146, 2008 | DOI: 10.5507/fot.2008.012  

The present paper focuses on the epipelic cyanobacteria and algae (particularly desmids). Altogether 45 sediment samples were taken at ponds covering a pH/conductivity and trophic gradients. Statistic evaluation based on environmental variables measured, divided localities into four major groups differing also by sediment quality and its algal flora. Altogether 39 cyanobacterial species were found including sedimented planktic or litoral forms, with prevalence of motile filamentous genera (Komvophoron, Oscillatoria, Phormidium, Pseudanabaena). Although, the majority of 42 desmid taxa belongs to commonly occurring species with a wide ecological...

The influence of the coagulant PAX-18 on Planktothrix agardhii bloom in a shallow eutrophic fishpond.

Eva Lelková, Martin Rulík, Petr Hekera, Pavel Dobiáš, Petr Dolejš, Marcela Borovičková, Aloisie Poulíčková

Fottea 8(2): 147-154, 2008 | DOI: 10.5507/fot.2008.013  

For the first time in the Czech Republic, the PAX-18 coagulant has been used to restore a eutrophic fishpond. The polyaluminium hydrochloride coagulant was applied repeatedly to a shallow eutrophic fishpond in spring 2005. Two cylindrical plastic enclosures were used to isolate parts of the pond as untreated controls. Selected environmental variables were measured in situ. Water samples were analyzed regularly for nutrients, chlorophyll a concentration and phytoplankton abundance and structure with special focus on Planktothrix agardhii. The PAX-18 treatment led to a marked increase in the N/P ratio and changes in the structure and abundance...