A5006858325- Protist diversity and phylogeny
- Microbial Community Ecology and Physiology
- Methane Hydrates and Related Phenomena
- Genomics and Phylogenetic Studies
- Marine Biology and Ecology Research
- Marine and coastal ecosystems
- Environmental DNA in Biodiversity Studies
- Parasite Biology and Host Interactions
- Aquatic Invertebrate Ecology and Behavior
- Marine Ecology and Invasive Species
- Plant Taxonomy and Phylogenetics
- Invertebrate Taxonomy and Ecology
- Legume Nitrogen Fixing Symbiosis
- Coleoptera Taxonomy and Distribution
- Botany and Plant Ecology Studies
- Plant and Fungal Species Descriptions
- Mollusks and Parasites Studies
- Fossil Insects in Amber
- Aquatic Ecosystems and Phytoplankton Dynamics
- Coastal wetland ecosystem dynamics
- Paleontology and Stratigraphy of Fossils
- Wastewater Treatment and Nitrogen Removal
- Geology and Paleoclimatology Research
- Genetic diversity and population structure
- Scarabaeidae Beetle Taxonomy and Biogeography
Comenius University Bratislava
2015-2024
University of Salzburg
2008-2012
Northeastern University
2011-2012
The species of Elmomorphus Sharp, 1888 occurring in Japan and Korea are redescribed illustrated: E. brevicornis (Japan, Korea) amamiensis Nomura, 1959 (Japan). standard barcoding fragment the mitochondrial gene coding for cytochrome c oxidase subunit I (COI) was sequenced used together with morphological characters to delimit taxonomic boundaries two species. To assess their morphometric variation, eight were measured statistically evaluated using principal component analysis. formed...
The majority of environmental micro-organisms identified with the rRNA approach have never been visualized. Thus, their reliable classification and taxonomic assignment is often difficult or even impossible. In our preliminary 18S gene sequencing work from world's largest anoxic marine environment, Cariaco Basin (Caribbean Sea, Venezuela), we detected a ciliate clade, designated previously as CAR_H [Stoeck, S., Taylor, G. T. & Epstein, S. (2003). Appl Environ Microbiol 63, 5656-5663]. Here,...
Date palm (Phoenix dactylifera) can accumulate as much 1% silicon (Si), but not is known about the mechanisms inherent to this process. Here, we investigated in detail uptake, accumulation and distribution of Si date palms, phylogeny transporter genes plants. We characterized PdNIP2 following heterologous expression Xenopus oocytes used qPCR determine relative genes. Silicon was by light microscopy, scanning electron microscopy coupled with X-ray microanalysis Raman microspectroscopy. proved...
Abstract Members of the class Armophorea occur in microaerophilic and anaerobic habitats, including digestive tract invertebrates vertebrates. Phylogenetic kinships metopid clevelandellid armophoreans conflict with traditional morphology‐based classifications. To reconcile their relationships understand morphological evolution diversification, we utilized molecular clock theory as well information contained estimated time trees morphology extant taxa. The radiation last common ancestor...
Dileptid and tracheliid ciliates have been traditionally classified within the subclass Haptoria of class Litostomatea. However, their phylogenetic position among haptorians has controversial indicated that they may play a key role in understanding litostomatean evolution. In order to reconstruct evolutionary history dileptids tracheliids, unravel affinity other haptorians, we used cladistic approach based on morphological evidence 18S rRNA gene sequences, including eight new ones. The...
Symbioses between Bacteria, Archaea, and Eukarya in deep-sea marine environments represent a means for eukaryotes to exploit otherwise inhospitable habitats. Such symbioses are abundant many low-oxygen benthic environments, where the majority of microbial contain prokaryotic symbionts. Here, we present evidence suggesting that certain oxygen-depleted water-column habitats, also associated with cells. Ciliates (protists) bacteria were found be dominant eukaryotic morphotype haloclines two...
The class Litostomatea is a highly diverse ciliate taxon comprising hundreds of free-living and endocommensal species. However, their traditional morphology-based classification conflicts with 18S rRNA gene phylogenies indicating (1) deep bifurcation the into Rhynchostomatia Haptoria+Trichostomatia, (2) body polarization simplification oral apparatus as main evolutionary trends in Litostomatea. To test whether molecules provide suitable proxy for litostomatean history, we used eighteen new...
Reconstruction of evolutionary history the ciliate order Spathidiida has proven elusive. There are weakly statistically supported deeper nodes in 18S rRNA gene phylogenies on one hand, while several strongly clusters containing morphologically dissimilar taxa that usually lack any common apomorphies other hand. To clarify whether silent aspects spathidiid phylogeny results methodological problems tree‐building algorithms, we examined informativness macronuclear locus using an increased taxon...
Trichostome ciliates are among the most conspicuous protists in gastrointestinal tract of a large variety vertebrates. However, little is still known about phylogeny trichostome/vertebrate symbiotic systems, evolutionary correlations between trichostome extrinsic traits, and character-dependent diversification trichostomes. These issues were investigated here, using relaxed molecular clock technique along with stochastic mapping character evolution, binary-state speciation extinction models....
Abstract The ciliate genus Spirostomum comprises eight morphospecies, inhabiting diverse aquatic environments worldwide, where they can be used as water quality indicators. Although species are relatively easily identified using morphological methods, the previous nuclear rDNA-based phylogenies indicated several conflicts in morphospecies delineation. Moreover, single locus and analytical approaches could not unambiguously resolve phylogenetic relationships among morphospecies. Here, we...
Like many other aquatic animals, freshwater planarians have also become partners of symbiotic ciliates from the class Oligohymenophorea. In present study, we explored hidden diversity and addressed questionable systematic position mouthless obligatory gut endosymbionts planarians, using nuclear mitochondrial SSU rRNA genes. Although all isolated morphologically corresponded to a single species, molecular analyses suggested existence three genetically distinct entities: Haptophrya...