Fottea, 2010 (vol. 10), issue 1

Jan Šmarda - 80 years

Jaromír Lukavský

Fottea 10(1): i-viii, 2010  

Desmids (Conjugatophyceae, Viridiplantae) from the Czech Republic; new and rare taxa, distribution, ecology.

Jan Šťastný

Fottea 10(1): 1-74, 2010 | 10.5507/fot.2010.001  

The present work summarizes the current diversity, distribution and autecology of desmids found within the Czech Republic; the focus is on the occurrence and autecology of rare taxa. Data are based on the author's extensive sampling from 2003-2009, during work for both his master's degree, and currently, his Ph.D. dissertation. Over 1 400 samples were collected, from various types of wetland habitats ranging from eutrophic fishponds, diverse bogs and fens, to ephemeral pools and various aerophytic habitats. Altogether, 526 taxa of desmids (401 species) belonging to 27 genera were found, 80 of them newly described in the Czech Republic. In the present work, ...

Phylogenetic position of Ooplanctella planoconvexa gen. et comb. nova and Echinocoleum elegans (Oocystaceae, Trebouxiophyceae, Chlorophyta).

Marie Pažoutová, Pavel kaloud, Katarína Nemjová

Fottea 10(1): 75-82, 2010 | 10.5507/fot.2010.002  

The coccoid green algae Coenochloris planoconvexa and Echinocoleum elegans are assigned to different families (Radiococcaceae and Oocystaceae, respectively), but display similar ray-like mucilaginous envelopes. Molecular analysis of the 18S rRNA gene of C. planoconvexa CAUP H 5502 and E. elegans SAG 37.93 revealed that they both belong to Oocystaceae. However, the two strains were not a part of a monophyletic cluster. Furthermore, their morphology differed, namely in the shape of their mucilaginous envelopes, and in their ability to form four-celled units in a broadened sporangial wall. Because the name Coenochloris cannot...

Cyanobacterium Petalonema alatum BERK. ex KIRCHN. - species variability and diversity.

Bohuslav Uher

Fottea 10(1): 83-92, 2010 | 10.5507/fot.2010.003  

Petalonema alatum is an interesting cyanobacterial species of subaerial calcareous habitats in gorges of the National Park Slovenský raj, Slovakia. Observation of different morphological forms in natural and culture materials is demonstrated and discussed. Cultures of P. alatum differed from natural populations mainly in the width of the filament apex, massiveness of mucilage sheaths, and degree of heteropolarity. This means that these features are more likely controlled by environmental variables. Other characteristics (heteropolarity, false branching, sheath structure) were found to be stable and consequently can have taxonomical importance.

Silica-scaled Chrysophyceae and Synurophyceae from Nigeria III. Chrysophytes from rivers of Edo State.

Daniel E. Wujek, Medina O. Kadiri, Ryan M. Dziedzic

Fottea 10(1): 93-98, 2010 | 10.5507/fot.2010.004  

A total of 18 species of silica-scaled chrysophytes (Chrysophyceae: one species each in Chrysosphaerella, Spiniferomonas, and Paraphysomonas; Synurophyceae: 11 Mallomonas spp. and four Synura spp.) was recorded from river samples collected in Edo State, Benin, Nigeria, from both dry and rainy seasons in 2003. Identifications were based on transmission electron microscopy. Five are new records for Nigeria, including four being newly reported for Africa. Two further species could not be identified.

Composition and dynamics of microeukaryote communities in the River Danube.

Katalin É. Szabó-Taylor, Keve T. Kiss, Ramiro Logares, Alexander Eiler, Éva Ács, Bence Tóth, Stefan Bertilsson

Fottea 10(1): 99-113, 2010 | 10.5507/fot.2010.005  

The diversity of microeukaryote communities inhabiting rivers is still poorly known. Here, we have analyzed the periphytic and planktonic microeukaryote communities present in one section of the River Danube by two different methods: 18S rRNA-based terminal restriction fragment length polymorphism with fragment sequencing and microscopical analysis of the phytoplankton and periphyton. Both data sets were then related to environmental variables. Molecular fingerprinting revealed diverse communities with fluctuating composition, with the majority of sequences affiliated to the groups Bacillariophyta, Synurophyceae and Chlorophyceae. This was in accordance wit...

A comparison between diatom assemblages in two groups of carbonate, low-altitude springs with different levels of anthropogenic disturbances.

Nicola Angeli, Marco Cantonati, Daniel Spitale, Horst Lange-Bertalot

Fottea 10(1): 115-128, 2010 | 10.5507/fot.2010.006  

Since several decades diatoms are increasingly used for the assessment of the trophic status of different freshwater ecosystems. However, spring habitats have been only marginally considered concerning this topic. The purpose of this research was to compare the diatom assemblages of two groups of carbonate, low-altitude springs, affected by different levels of anthropogenic disturbances. Between 2005 and 2008, diatoms were sampled in 57 low-altitude, carbonate springs, keeping separate the main microhabitats (stones and bryophytes), and assessing an extensive number of morphological, physical, and chemical variables. Two datasets were considered for the pre...

Photosynthetic microorganisms as epibionts and euendoliths on biotic substrates in a thermal spring with ferric-iron deposits.

Canella Radea, Ioanna Louvrou, Adriani Pantazidou, Athena Economou- Amilli

Fottea 10(1): 129-140, 2010 | 10.5507/fot.2010.007  

Rust-coloured shells of the aquatic gastropod Ventrosia ventrosa, a new record for eastern Greece, indicating presence of iron (EDAX analysis) were studied for detection of iron-encrusted photosynthetic epibionts in a Greek brackish-water thermal spring (38 °C). Microscopic analyses (LM, SEM) revealed the presence of a biofilm consisted of mostly facultative micro-epibionts, i.e. a) 5 periphytic taxa of coccal and filamentous cyanobacteria, including a taxonomically and ecologically interesting morphospecies, Xenococcus cf. pyriformis, dominated exclusively on the shell surface, and b) pennate diatoms with higher species richness (18 pe...

First report of Makinoella tosaensis OKADA (Chlorophyta, Chlorococcales, Oocystaceae) outside East Asia.

František Hindák, Alica Hindáková

Fottea 10(1): 141-144, 2010 | 10.5507/fot.2010.008  

The morphology of Makinoella tosaensis Okada 1949, a chlorococcalean coenobial alga described from Japan and since then observed only in Korea, has been studied under the LM from field material and in laboratory cultures. Its collection from a small fountain in the campus park of the Slovak Academy of Sciences in Bratislava, Slovakia, is the first record outside East Asia. The morphology of coenobia and cells in this material is in agreement with published data of the species.