مقالات رزومه دکتر علی ناصری

The current study is provided for floristic research of Pinnulariaceae for the first time in Iran from 1972 to July 2021. The pinnulariaceae family contains 6 genera Pinnularia, Oestrupia, Hygropetra, Envekadea, Diatomella, and Craspedopleura which are two genera Pinnularia and Diatomella have been recorded in Iran. The purpose of the present study was to provide a checklist of Pinnularaceae in Iran ecosystems.

Different recourses were used to provide this paper, including the thesis of students' dissertations, books, and articles. The old taxonomic names of taxa were converted to new names based on algae-based websites.

This taxonomic list contains 2 genera comprises Diatomella and Pinnularia. It includes 52 species with emphasis on the Pinnularia Ehrenberg genus from various ecosystems. The Pinnularia was the most frequent genus with 51 species and 98% of the species in the Pinnulariaceae. Diatomella Greville was stand in the second genus in the frequency of population (2%) with 1 species. There are only one species of Diatomella in the current checklist of Pinnulariaceae which has been reported from Kordan River in Alborz Province.

Some of the species’ names have changed based on this update.

Diatoms are small phototrophic organisms with an essential role in the food chain in terrestrial and aquatic environments. The purpose of the present study was to optimize and improve the methods for diatom sample preparations.

The difference between the improved method with the old ones is based on the 3-interval time of the supernatant collection. Also, the centrifuge is not necessary for this improved method.  

The average number of cells in our proposed method was 338% higher than the other methods.

The preparation of specimen suspension and caution in a sampling of stations, is the most important factor for obtaining a maximum sample of diatoms.