Skorobogatova O.N.

Taxonomic structure of cyanoprokaryota and algae of water bodies in «Yugra» park (Nizhnevartovsk area, Khanty-Mansiysk autonomous okrug – Yugra)

Abstract:

The paper presents the results of the research conducted in 2015–2016 during the open water period. The research was commissioned by the Museum Ethnological and Ecological Park «Yugra». The objects of the study included plankton, benthos and periphyton algae in the water bodies located in the park i.e.the Ay Kyrtypyakh River, Pasynlor Lake and sphagnous raised bogs. Ñollection of materials, their preparation and analysis were conducted by the methods commonly accepted in algology. The list of algae and cyanoprokaryota was brought into con-formity with «AlgaeBase» 2017 nomenclature. During the period of the research the water temperature in the above mentioned water bodies varied between +2–22°Ñ; the transparency by Secchi disk was 52–100cm; the hydrogen ion concentration was 5.3–5.7. The integrated research allowed scientists to detect rich composition of cyanoprokaryota and algae species and types. Algae community in the Ay Kyrtypyakh River is reophilic. The species found in the river comprise 59,6% of all the species in «Yugra» park. The Park bogs and Lake Pasynlor have less diversified algae community which is mostly represented by small celled species (35,2% for the bogs and 34,2% for the lake). Two phyla, Bacillariophyta and Chlorophyta, dominate with 74,5% of the total composition. They dominate not only in algoflora but also in algal communities of some studied objects (76,9% in the Ay Kyrtypyakh River; 80,6% in Lake Pasynlor; 72,5% in sphagnous raised bogs). Significant richness in species was determined in Bacillariophyceae and Conjugatophyceae (Zygnematophycea) classes, Eunotiaceae, Pinnulariaceae, Closteriaceae, Desmidiaceae and Phacaceae families as well as in Eunotia, Closterium and Pinnularia genera. Special characteristic of the family spectrum is the richness of species in Eunotiaceae. The algoflora demonstrates formation of a «bog complex» adapted to the acidification and poor mineral composition of the waters. The research identified a considerable number of scanty classes, families and genera. According to their activity the algae are divided into 4 groups. Exceptionally numerous are inactive species. Rhopalodia gibba is the most active species in the river while Oocystis marssonii, O. rhomboidea are active in the lake. While studying algae species in the river after the effects of oil pollution, a dramatical loss of species diversity was found. 8 species are common for all the studied water bodies i.e. Cyclotella meneghiniana, Tabellaria fenestrata, T. flocculosa, Rhopalodia gibba, Eunotia exigua, E. fallax, E. lunaris and E. minor.

About the autors:

Olga Nikolaevna Skorobogatova, Candidate of Biological Science, Associate Professor of ecology.

Place of employment:

Nizhnevartovsk State University.

Contacts:

e-mail: Olnics@yandex.ru.

Key words:

algoflora; diversity; taxon; Ay Kyrtypyakh River; Lake Pasynlor; sphagnous raised bog.