The aim of this research is study of modern species diversity of Naviculales (Bacillariophyta) of Kiev small water bodies were investigated using electronic and light microscopy with current nomenclature changes; detect changes in species composition of Naviculales for almost a hundred years. Data about Bacillariophyta, including diatoms of small water bodies of Kiev are in many articles since 1921. According to the literature data in the water bodies, 66 species of Naviculales were found, 1/3 of which was provided genus Navicula Bory and 1/3 – genus Pinnularia Ehrenb. To date, however, many of the studied reservoirs have ceased to exist, on other ones have increased anthropogenic stress or anthropogenic load changed its character. Algological materials were collected by accepted algological methods, in water bodies of different types (small rivers, streams, springs, canals, ditches, ponds, lakes, flood water bodies, puddles), in different seasons. Samples were being placed in a saturated solution of potassium dichromate in sulfuric acid or being boiled in concentrated sulfuric acid. Research of the samples carried out using a light microscope Studar (Poland) and scanning electron microscope JSM-6060LA (Japan). Photomicrographs were taken et scanning microscope JSM-6060LA. In small reservoirs of Kiev was found 78 species, which respondent 24 genera and 12 families. First place in the floristic range occupied genus Navicula (18 species, 23%), the second – genus Stauroneis (9 species, 11.5%), the third – Pinnularia (6 species, 7.7%). 37 species are new for region, 4 – for Ukraine (Navicula antonii Lange-Bert, N. caterva Hohn et Hellerman, N. upsalensis (Grunow) Perag., Stauroneis subgracilis Ehrenb.). According to total (own and literary) data in small water bodies of Kiev 110 Naviculales species from 25 genera and 12 families were found. To the present tense the species structure of Naviculales had undergone some changes: as result of the disappearance of peat bogs and boggy ponds had noticeably decreased the diversity of algae of the genus Pinnularia.

Keywords: small water bodies, Kiev, flora, Naviculales

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