Taxonomic Composition of the Phytoplankton in the Midle Caspian Sea

Abstract

A high variyety of vegetation and a predominance of small cell forms are typical of the current structure of the phytoplankton of the seacoastal shallow waters of the Russian coastline of the Caspian Sea. The replacement of the dominating complex and the size groups of the phytoplankton has occurred. The phytoplankton community is represented by six categories: Cyanophyta, Bacillariaphyta, Dinophita, Euglenophyta, Chlorophyta, and the small flagellates. The basis of the taxonomic variety consists of the Diatoms algae. The composition of species of the phytoplankton of the sea coastal shallow waters of the Russian water area of the Middle Caspian is in a dynamic state and depends on the direction of the change of water regime.

Shionodiscus caspicus sp. nov. (Bacillariophyta, Thalassiosiraceae) from the Caspian Sea and four nomenclatural combinations for Shionodiscus

“…In addition, these taxa were taxonomically revised once again (Gogorev, Pushina, 2015). However, the articles on the species diversity of the diatoms of the Caspian Sea Region still contain the old names of the species: Thalas siosira caspica, T. variabilis, T. affinis (Abdurakhmanova et al, 2010;Bagheri et al, 2012;Bagheri, Fallahi, 2014;Barkhalov et al, 2019;Guseynov et al, 2019;Umerbaeva et al, 2019). To our deep regret, many current papers on the Caspian Sea microalgae almost lack illustrations (figures and photos), which may help verify the reliability of the species determination.…”