A5082209455- Protist diversity and phylogeny
- Microbial Community Ecology and Physiology
- Genomics and Phylogenetic Studies
- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Aquatic Ecosystems and Phytoplankton Dynamics
- Parasitic Infections and Diagnostics
- Environmental DNA in Biodiversity Studies
- Methane Hydrates and Related Phenomena
- Marine Ecology and Invasive Species
- Marine Invertebrate Physiology and Ecology
- Food Industry and Aquatic Biology
- Biocrusts and Microbial Ecology
- Geology and Paleoclimatology Research
- Legionella and Acanthamoeba research
- Marine and environmental studies
- Algal biology and biofuel production
- Photosynthetic Processes and Mechanisms
- Nematode management and characterization studies
- Marine and coastal plant biology
- Parasite Biology and Host Interactions
- Geochemistry and Elemental Analysis
- Aquatic Invertebrate Ecology and Behavior
- Diatoms and Algae Research
- Legume Nitrogen Fixing Symbiosis
Institute of Biology of Inland Waters named Ivan Dmitrievich Papanin
2015-2024
University of Tyumen
2020-2024
University of British Columbia
2013-2023
British Academy
2021
Zoological Institute
2018-2019
Russian Academy of Sciences
2006-2015
Canadian Institute for Advanced Research
2013
Assembling the global eukaryotic tree of life has long been a major effort Biology. In recent years, pushed by new availability genome-scale data for microbial eukaryotes, it become possible to revisit many evolutionary enigmas. However, some most ancient nodes, which are essential inferring stable tree, have remained highly controversial. Among other reasons, lack adequate genomic datasets key taxa prevented robust reconstruction early diversification events. this context, centrohelid...
Apicomplexans are a major lineage of parasites, including causative agents malaria and toxoplasmosis. How such highly adapted parasites evolved from free-living ancestors is poorly understood, particularly because they contain nonphotosynthetic plastids with which have complex metabolic dependency. Here, we examine the origin apicomplexan parasitism by resolving evolutionary distribution several key characteristics in their closest relatives, photosynthetic chromerids predatory colpodellids....
Animals and fungi have radically distinct morphologies, yet both evolved within the same eukaryotic supergroup: Opisthokonta1,2. Here we reconstructed trajectory of genetic changes that accompanied origin Metazoa Fungi since divergence Opisthokonta with a dataset includes four novel genomes from crucial positions in phylogeny. We show animals arose only after accumulation genes functionally important for their multicellularity, tendency began pre-metazoan ancestors later accelerated metazoan...
The resolution of the broad-scale tree eukaryotes is constantly improving, but evolutionary origin several major groups remains unknown. Resolving phylogenetic position these "orphan" important, especially those that originated early in evolution, because they represent missing links between established groups. Telonemia one such orphan taxon for which little known. group composed molecularly diverse biflagellated protists, often prevalent although not abundant aquatic environments. has been...
Abstract Background The origin of animals from their unicellular ancestor was one the most important events in evolutionary history, but nature and order leading up to emergence multicellular are still highly uncertain. diversity biology relatives have strongly informed our understanding transition single-celled organisms Metazoa. Here, we analyze cellular structures complex life cycles novel holozoans Pigoraptor Syssomonas (Opisthokonta), implications for animals. Results characterized by...
Abstract Background The Euglenozoa are a protist group with an especially rich history of evolutionary diversity. They include diplonemids, representing arguably the most species-rich clade marine planktonic eukaryotes; trypanosomatids, which notorious parasites medical and veterinary importance; free-living euglenids. These different lifestyles, particularly transition from to parasitic, likely require metabolic capabilities. We carried out comparative genomic analysis across euglenozoan...
The evolutionary and ecological importance of predatory flagellates are too often overlooked. This is not only a gap in our understanding microbial diversity, but also impacts how we interpret their better-studied relatives. A prime example these problems found the alveolates. All well-studied species belong to three large clades (apicomplexans, dinoflagellates, ciliates), colponemid alveolates that rare nature seldom cultured, potentially important alveolate evolution. Recently reported...
Microbial eukaryotes are important components of marine ecosystems, and the Marine Alveolates (MALVs) consistently both abundant diverse in global environmental sequencing surveys. MALVs dinoflagellates that thought to be parasites other protists animals, but lack data beyond ribosomal RNA gene sequences from all a few described species means much their biology evolution remain unknown. Using single-cell transcriptomes several free-living relatives, we show evolved independently two...
Abstract Aim This study aims to evaluate the role of various factors in structuring biogeographical distribution small‐sized organisms. More specifically, we analysed three groups marine benthic organisms differing body size, both unicellular and metazoans, assess relevance geographical environmental on their taxonomic composition. Location Global. Taxon Heterotrophic flagellates, Ciliophora, Harpacticoida (Copepoda). Methods The set predictors included species richness (a proxy for sampling...
A small free-living freshwater bacteriotrophic flagellate Neobodo borokensis n. sp. was investigated by electron microscopy and analysis of its SSU ribosomal RNA gene. This protist has paraxonemal rods typical bodonid structure in the flagella, mastigonemes on proximal part posterior flagellum, two nearly parallel basal bodies, a compact kinetoplast, discoid mitochondrial cristae. The flagellar pocket is supported three microtubular roots (R1, R2 R3) originating from kinetosome. cytopharynx...
Abstract Kinetoplastids are heterotrophic flagellated protists, including important parasites of humans and animals (trypanosomatids), ecologically free-living bacterial consumers (bodonids). Phylogenies have shown that the earliest-branching kinetoplastids all or obligate endosymbionts, whose highly-derived state makes reconstructing ancestral group challenging. We isolated new strains unusual flagellates molecular phylogeny shows to be most closely related endosymbiotic parasitic...
Rhizarian 'Novel Clade 10' (NC10) is frequently detected by 18S rRNA gene sequencing studies in freshwater planktonic samples. We describe a new genus and two species of eukaryovorous biflagellate protists, Aquavolon hoantrani n. gen. sp. A. dientrani sp., which represent the first morphologically characterized members NC10, here named Aquavolonida ord. nov. The slightly metabolic cells possess naked heterodynamic flagella, whose kinetosomes lie at right angle to each other are connected...
Abstract Testate amoebae are unicellular organisms that occur worldwide in lacustrine habitats and have been widely used as proxies for palaeoreconstruction bioindicators of contemporary ecosystems. Our knowledge the environmental factors determining spatial distribution testate stratified freshwater lakes remains limited. The objective this study was to assess correlations between studied variables species structure communities inhabiting different limnological zones within a single lake...