Dynamics of algosynusiae of bottomland meadow biogeocoenoses of the State nature reserve "Nurgush"
The dynamics of algosynusia of floodplain meadow and forest ecosystems of the State nature sanctuary «Nurgush» (Kirov region) was researched. 92 species of algae and cyanobacteria (CB) were identified in the algosynusiae. Algosynusiae of floodplain biogeocoenoses have features of algal flora of zonal types of soils. The species diversity is dominated by green algae and CB. In the floodplain meadows the number of green algae and CB species is about the same (35.5 and 34.2% respectively). 13.2% algale is represented with Xanthophyta and Eustigmatophyta, which is below average for Kirov region. In forest biocoenoses the greatest species diversity is represented by green algae (36.5%), CB account for 30.6%, Xanthophyta and Eustigmatophyta - for 16.4%. For floodplain ecosystems the coefficients of floristic connection of Sorensen-Czekanowski show moderate affinity of the Algoflora compared, that emphasizes the similar nature of the impact of major abiotic factors on their formation. The highest number of micro phototrophs in meadow biocoenoses is in August, while in forest biocoenoses - in September. The highest number of algal flora throughout the season observations is found in willow biocoenosis is located on the banks of the Vyatka river.