Comparative studies of algal flora in various areas of the floodplain of the Yumaguzinsky reservoir

УДК 582.26/27+582.232(470.57)

Abstract

Studies of algal flora were carried out in various areas of the floodplain of the Yumaguzinsky Reservoir (Republic of Bashkortostan), since the preservation of the biodiversity of coastal aquatic ecosystems is one of the important tasks of environmental protection measures. Soil samples were taken under synanthropic, meadow and forest vegetation. The algal flora of the sites differed in the number of species, the composition of the dominant complex, the activity of species and the spectrum of life forms. A large species diversity of algal flora was revealed from 3 divisions, 5 classes, 8 orders, 18 families, 30 genera and 61 species and intraspecific taxa. Representatives of the departments Cyanobacteria and Chlorophyta dominated (33 and 20 species and infraspecific taxa, respectively), the leading families being Phormidiaceae and Nostocaceae. The range of ecobiomorphs of algal flora included 8 life forms: in areas with synanthropic vegetation P,,CF7Ch7B,M,amph Hydr,, meadow - P,,Ch,nCFcB,M,NF,hydr,amph,, forest - BcCRCh,NF,PF,P,hydr,. The maximum 11 7 7 6 6 2 1 11 10 5 3 3 1 1 1 5 4 3 1 1 1 1 value of the xerophilicity coefficient was recorded under synanthropic vegetation - 0.42, the coefficient of hydrophilosity -under forest vegetation - 0,4. An analysis of the dynamics of changes in the main taxa of soil algae over the summer period showed that the richest species composition was revealed in July - August and the number of algae in all areas was maximum. The quantitative and qualitative ratio of all sections of algae is relatively constant, changes in the ratios are insignificant.