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Fottea 8, Number 2

REVIEW

GONTCHAROV, A. A.: Phylogeny and classification of Zygnematophyceae (Streptophyta): current state of affairs. - Fottea 8(2): 87–104, 2008
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SHORT NOTE

CAISOVÁ, L., HUSÁK, Š. & KOMÁREK, J. : Nitella mucronata (Br.) Miquel (Charophyta) in the Czech Republic. - Fottea 8(2): 105–107, 2008
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SHORT NOTE

KAŠTOVSKÝ, J.: A report of Stephanosphaera pluvialis Cohn 1852 (Chlorophyta, Chlamydophyceae). - Fottea 8(2): 109–110, 2008
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NEUSTUPA, J. & NEMJOVÁ, K.: Quantitative assessment of morphological variation of six Pseudococcomyxa strains by geometric morphometric descriptors. - Fottea 8(2): 111–116, 2008
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SHORT NOTE

MANN, D. G.: The genus Sellaphora: an addition and corrections. - Fottea 8(2): 117–119, 2008
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JAHN, R., MANN, D. G., EVANS, K. M. & POULÍČKOVÁ, A.: The identity of Sellaphora bacillum (Ehrenberg) D.G. Mann. - Fottea 8(2): 121–124, 2008
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KUČERA, P., GRULICH, V., FRÁNKOVÁ, M. & BUREŠ, P.: Distribution of freshwater red algal family Lemaneaceae (Rhodophyta) in the Czech Republic: an update. - Fottea 8(2): 125–128, 2008
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SHORT NOTE

HAUER, T.: Epilithic cyanobacterial flora of Mohelenská hadcová steppe Nature Reserve (western Moravia, Czech Republic) 70 years ago and now. - Fottea 8(2): 129–132, 2008
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HAŠLER, P., ŠTĚPÁNKOVÁ, J., ŠPAČKOVÁ, J., NEUSTUPA, J., KITNER, M., HEKERA, P., VESELÁ, J., BURIAN, J. & POULÍČKOVÁ, A.: Epipelic cyanobacteria and algae: a case study from Czech ponds. - Fottea 8(2): 133–146, 2008
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LELKOVÁ, E., RULÍK, M., HEKERA, P., DOBIÁŠ, P., DOLEJŠ, P., BOROVIČKOVÁ, M. & POULÍČKOVÁ, A.: The influence of the coagulant PAX-18 on Planktothrix agardhii bloom in a shallow eutrophic fishpond. - Fottea 8(2): 147–154, 2008
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GONTCHAROV, A. A.: Phylogeny and classification of Zygnematophyceae (Streptophyta): current state of affairs.

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 the class members. In this paper, an overview of recent advances in our understanding of the phylogeny and classification of conjugating green algae is presented, with emphasis on the major clades established in the class, the clades’ structure and polyphyly of some genera. We describe the areas of conflict and agreement between molecular phylogeny and traditional morphology-based taxonomy and stress that phenotypic characters provide little evidence for inferring relationships between taxa even at low taxonomic levels.

 

CAISOVÁ, L., HUSÁK, Š. & KOMÁREK, J. : Nitella mucronata (Br.) Miquel (Charophyta) in the Czech Republic.

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 and ecological characters are summarized in our article.

 

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

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.

 

NEUSTUPA, J. & NEMJOVÁ, K.: Quantitative assessment of morphological variation of six Pseudococcomyxa strains by geometric morphometric descriptors.

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 for their future phenotypic characterization.

 

MANN, D. G.: The genus Sellaphora: an addition and corrections.

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.

 

JAHN, R., MANN, D. G., EVANS, K. M. & POULÍČKOVÁ, A.: The identity of Sellaphora bacillum (Ehrenberg) D.G. Mann.

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 of a clone (referred to as BLA4 in previous publications) from Blackford Pond, Scotland, for which a DNA barcode is available (the cox1 sequence deposited as GenBank EF164941). We illustrate both the epitype and the natural S. bacillum population from which BLA4 was derived.

 

KUČERA, P., GRULICH, V., FRÁNKOVÁ, M. & BUREŠ, P.: Distribution of freshwater red algal family Lemaneaceae (Rhodophyta) in the Czech Republic: an update.

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 rare having been identified from a single site.

 

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

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.

 

HAŠLER, P., ŠTĚPÁNKOVÁ, J., ŠPAČKOVÁ, J., NEUSTUPA, J., KITNER, M., HEKERA, P., VESELÁ, J., BURIAN, J. & POULÍČKOVÁ, A.: Epipelic cyanobacteria and algae: a case study from Czech ponds.

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 amplitude, several remarkable taxa occurred mostly at oligo/dystrophic sites with sandy sediments. The highest species richness of euglenophytes was found on the muddy sediments (both oxygenated and anoxic). Other epipelic organisms were represented by Gymnodinium aeruginosum, Paulinella chromatophora and various protozoa, feeding on epipelic algae (Amoeba, Urceolus cyclostomus).

 

LELKOVÁ, E., RULÍK, M., HEKERA, P., DOBIÁŠ, P., DOLEJŠ, P., BOROVIČKOVÁ, M. & POULÍČKOVÁ, A.: The influence of the coagulant PAX-18 on Planktothrix agardhii bloom in a shallow eutrophic fishpond.

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 of phytoplankton in the fishpond and P. agardhii blooms were eliminated in the fishpond. By contrast, P. agardhii dominated the phytoplankton in the control enclosures, as it had in the fishpond in 2004, prior to the PAX-18 treatment.