A5036029594- Aquatic Ecosystems and Phytoplankton Dynamics
- Environmental Science and Water Management
- Algal biology and biofuel production
- Diatoms and Algae Research
- Marine and coastal ecosystems
- Biocrusts and Microbial Ecology
- Marine and environmental studies
- Aquatic and Environmental Studies
- Protist diversity and phylogeny
- Botany and Plant Ecology Studies
- Bryophyte Studies and Records
- Lichen and fungal ecology
- Water Quality and Pollution Assessment
- Geological Studies and Exploration
- Ecology and biodiversity studies
- Microbial Community Ecology and Physiology
- Aquatic Invertebrate Ecology and Behavior
- Paleontology and Stratigraphy of Fossils
- Diverse Scientific Research in Ukraine
- Water Quality Monitoring and Analysis
- Phytochemicals and Antioxidant Activities
- Essential Oils and Antimicrobial Activity
- Chromosomal and Genetic Variations
- Medicinal plant effects and applications
- Metabolomics and Mass Spectrometry Studies
Plovdiv University
2007-2024
Bulgarian Academy of Sciences
2016-2024
Institute of Biodiversity and Ecosystem Research
2016-2024
Stephan Angeloff Institute of Microbiology
2023
Cyanobacteria are unique prokaryotes, which capable to perform oxygenic photosynthesis. Within these organisms, phycobilisomes (PBS) act as an antenna of the photosynthetic pigment apparatus. Phycobilisomes contain several phycobiliproteins (PBP): phycoerythrin (PE), phycocyanin (PC), allophycocyanin (APC) and phycoerythrocyanin (PEC). The application in biotechnology, food industry medicine during last years is rapidly increasing. aim our study was assess qualitative quantitative content...
Allelopathic interactions are widespread in all aquatic habitats, among groups of primary biomass producers, including cyanobacteria. Cyanobacteria producers potent toxins called cyanotoxins, whose biological and ecological roles, their allelopathic influence, still incompletely understood. The potential the cyanotoxins microcystin-LR (MC-LR) cylindrospermopsin (CYL) on green algae (Chlamydomonas asymmetrica, Dunaliella salina, Scenedesmus obtusiusculus) was established. Time-dependent...
Abstract The phytoplankton diversity, algal biomass, and selected physicochemical parameters were investigated in the drinking water reservoir (Borovitsa) located Kardzhali region, Bulgaria. Particular attention was given to Cyanoprokaryota presence of cyanotoxins samples. Twenty-nine species belonging six divisions (Cyanoprokaryota, Chlorophyta, Zygnemophyta, Dinophyta, Euglenophyta Bacillariophyta) identified. microscopic examination samples showed dominance Ankyra judayi, Oocystis...
As producers of biomass, cyanobacteria are a major part the phytoplankton in large number water basins. Due to cyanobacterial blooms and cyanotoxins produced, these organisms recognized as threat ecological risk for bodies. Released may cause death many including birds fish. Vaya Lake is largest natural lake Bulgaria. It located on Via Pontica migration route between Europe Africa. Since 2003, has been declared "Wetland international importance” under Ramsar Convention. According literature...
Taxonomic composition and abundance of summer phytoplankton were studied in 78 lakes Bulgaria.The Hungarian Assemblage index was applied for the first time on various Bulgarian lake types 27 functional groups identified.The dominant differed based type trophic status.Functional groups' frequency distribution showed that high relative assemblages L 0 , Y, MP, N, E, X3, X ph indicated or good status, regardless type.Simultaneously undesirable assemblages, linked to declined water quality, M J,...
The study focused on sampling procedures and analysis of biological physico-chemical quality elements (according to the EU Water Framework Directive (WFD)) aimed at defining reference conditions sites, maximum ecological potential, specific hydromorphological for assessed surface water types “rivers” “lakes” categories. Biological (BQE) their metrics were selected in compliance with WFD requirements its additional guidelines. All five compulsory BQEs surveyed (phytoplankton, macrophyte...
Over the past decade new ecological indices based on phytoplankton and macrophytes were developed as part of tools for assessment status water bodies. This study demonstrates applicability two them (Assemblage index /Q/ Algae Group Index /AGI/) evaluation bodies from a lake type L4 well their comparability. Assessment ecosystems was performed in order to ensure successful protection, enhancement management lowland semi-mountain lakes Bulgaria. Data aquatic flora Golyamo Skalensko Lake Malko...
As a result of the continuous revision cyanobacterial taxonomy,
Background: Pollution of aquatic ecosystems with heavy metals leads to decrease the biodiversity and accumulation toxicants in food chain.Species genus Scenedesmus are sensitive indicators environmental changes have been used for evaluation risk factors contamination ecosystems.The microalga incrassatulus can remove chromium cadmium from growth medium.Also, mammalian cell lines another type test system that has study mechanisms metal toxicity.However, little is known about sensitivity...
The legal requirements stated in the EU Water Framework Directive (WFD) have led to increased activity concerning macrophyte indicator metrics Europe. Nevertheless Bulgaria such indexes are still under consideration because of lack official methodologies. surveys undertaken as a part two EU-funded projects unique resource allowing aquatic plant communities be studied. Reference Index (RI) was chosen assessment method since classifies rivers by using regional approach and reflects different...
Research has been carried out of the main characteristics phytoplankton communities in order to assess ecological status and potential types lakes Bulgaria, according requirements WFD 2000/60/EC. Eighty lakes/reservoirs have researched on territory Republic Bulgaria. The assessment was made basis four metrics (phytoplankton biovolume; Algae Groups Index; transparency, chlorophyll a) three additional (% Cyanobacteria; intensity algal “bloom” presence toxic species). More than half Bulgaria...
The 'normative definitions' of ecological water quality classes given by the Water Framework Directive (WFD) are narrative descriptions conditions present in bodies different qualities relative to reference found unimpacted sites. Defining type-specific for and finding biological metrics that sensitively reflect only anthropogenic deviations from those biggest challenges status assessment faces. This study aimed at phytoplankton, macrophyte, macro-invertebrates andfish-based two high...
Atanasovsko Lake is a coastal lagoon used for salt extraction many years.Its salinity varies within wide range (from 6.3 to > 72‰).Despite these extreme conditions, phytoplankton blooms are often observed.Therefore, our aim was study the key abiotic drivers and ecological optimum of picoplankton in 5-year period (2013)(2014)(2015)(2016)(2017).The taxonomic composition, long-term dynamics autotrophic (APP) has been investigated North Saltern Lake.The APP species were identified by using...
Some species of Cyanoprokaryota produce toxins that affect animals and humans. Most the freshwater basins in Bulgaria, including dams, are relatively well studied terms phytoplankton composition, but data for presence cyanotoxins limited. The aim our study was to evaluate diversity, distribution quantitative development as public reservoir Vacha. We have collected water samples from Vacha at different time points. All were analyzed by ELISA, tested cytotoxicity on cell cultures vitro....
The cyanobacterial species Raphidiopsis raciborskii (Wołoszyńska) Aguilera et al. has a high invasiveness potential, which in less than century leads to its cosmopolitan spread. In the temperate climate of Europe, R. been reported many countries, but there is still lack detailed information about current status distribution lakes Bulgaria, as part southeastern range spread Europe. We investigated using data on phytoplankton 122 surveyed during 13-years period (2009-2022). was found 33 (up...
The taxonomical status of the species Scenedesmus regularis SVIR. and S. pectinatus MEYEN was discussed by analysis karyotype. results a morphological morphometrical chromosomal SVIR, are described in detail. It found that karyotype (n = 4) consists two large submetacentric chromosomes, one small metacentric chromosome chromosome. 5) three chromosomes both divided into groups subgroups. general formulae as well total average methaphase length their haploid set were presented. On basis it...