Among the Cyanoprokaryota, the genera Synechocystis and Synechococcus have rarely been studied with respect to potential toxicity. This is particularly true with marine environments where studies about the toxicity of cyanobacteria are restricted to filamentous forms at the warmer temperate and tropical regions and also to filamentous forms at cold seas such as the Baltic Sea. In this study, we...

Besides ultrastructural and biochemical characteristics, thallus color, which is due to antenna pigments of the photosynthetic apparatus, is one of the major distinguishing criteria in the classification of algae, finding its reflection in the likes of cyanoprocaryota, rhodophyta, chlorophyta, xanthophyceae, chrysophyceae, or phaeophyceae. The majority of past studies on algal pigments, however...

The polyphasic approach is the most progressive system that has been suggested for distinguishing and phylogenetically classifying Cyanoprokaryota (Cyanobacteria/Cyanophyta). Several oscillatorialean genera (Lyngbya, Phormidium, Plectonema, and Leptolyngbya) have problematic phylogenetic position and taxonomic state because of their heterogeneity and polyphyletic nature. To accurately resolve t...

Vaya (Ramsar site, protected area and Natura 2000 site) is the biggest natural lake in Bulgaria and the shallowest Black Sea coastal lake, which during the last decades has undergone significant changes and was included as critically endangered in the Red List of Bulgarian Wetlands. Our studies were conducted during the summer and autumn months of three years - 2004-2006. The paper presents res...

The general awareness of the threats on biodiversity and water quality raised number studies that use phytoplankton in assessment procedures. Since most metrics require obtaining mean values, this paper presents data may help speed up field work find indicators for a rapid based single samplings, allowing simultaneous many sites. from 43 Bulgarian waterbodies collected during three summer campa...

The present study compared the stress response of two microalgal strains – Arthronema africanum (Cyanoprokaryota) and Coelastrella sp. BGV (Chlorophyta), after heavy metals’ treatment. Changes algal growth, pigment protein content were analyzed adding Cu, Cd Pb (50 µM 100 µM) to nutrition medium. It was found that significantly inhibited growth biosynthesis microalgae, but effect Cu remained le...

A critical and systematic revision of the species composition microphytobenthos northwestern part Black Sea was made. The author conducted long-term research (1980–2021), as well analyzed retrospective data. In total, 524 were found in Sea, which belong to 185 genera, 99 families, 53 orders, 12 classes, 8 divisions, 4 kingdoms, 2 empires (domains). Representatives division Bacillariophyta (413 ...

The results of the analysis retrospective and original researches algoflora a hyperhaline Kuyalnyk Estuary (KE) for 150-year period are resulted. current state long-term variability species composition structure algae aquatic soil forms estuary, peculiarities their ecotopic confinement to factors salinity, pH, saprobity given. During many years research in waters KE 237 algal taxa from 10 divis...