the present study explores some physical and chemical parameters in the epilithic diatoms in the water samples obtained from two stations in koçan falls, erzincan from march to november 2014. over the course of the study, 19 taxa of epilithic diatoms were recorded. diatom genera which had the highest number of species in the study period were cymbella (4 species), navicula (4 species), and cycl...

phytoplankton communities play a significant role in the oceanic biological pump by forming the base of the trophic structure. increase in nutrients loading affects spatial and temporal distribution of phytoplankton. this study examined the phytoplankton community structure and ecological indices in relation to nutrients dynamics in both estuarine and oceanic areas of ramisi-vanga systems along...

background : the most frequent use of diatoms in forensic science is the diagnosis of death due to drowning. the basic principle of diatom test in drowning is based on the inference that diatoms are present in medium where drowning took place and the inhaled water enters the alveolar spaces of lungs and penetrates from the alveoli into the blood circulation, thus microscopic unicellular algae c...

Diatoms are unicellular photoautotrophic eukaryotes that play an important role in ecology by fixing large amounts of CO2 in the oceans. Because they evolved by secondary endocytobiosis--a process of uptake of a eukaryotic alga into another eukaryotic cell--they have a rather unusual cell biology and genetic constitution. Diatoms are also of biotechnological interest since they produce highly u...

A phylogeny of the diatoms was inferred from comparisons of nuclear-encoded small subunit ribosomal RNA coding regions using maximum likelihood, weighted maximum parsimony, and neighbor-joining distance methods with Jukes and Cantor, Kimura, Gamma, van de Peer, and LogDet evolutionary models. Analyses of 30 taxa in 11 orders recovered two clades (Clades I and II). Neither of these clades corres...

Phytoplankton taxa composition of the Caspian Sea were evaluated by using samples collected at 12 stations along the Iranian coast of the Caspian Sea between 1996 and 2010. This study identified 158 phytoplankton species consisted of diatoms (70 species), dinoflagellates (23 species), chlorophytes (29 species), cyanophytes (31 species), and euglenoids (5 species). The dominant species were the...