Abstract
This paper presents the results of the research on macrophytes of floodplain swamps of the coastal territories of the Aktastinka River and wetlands of Aktasty village, located in Arshalinsky district, Akmola region of the Republic of Kazakhstan. The inventory revealed the floristic composition of the Aktastinka village locality and the coastal territory. Along with species diversity, the main representatives of macrophytes of the bog flora were identified, represented by 8 hydrophytes – Phragmites australis, Carex rostrata, Typha angustifolia, Ranunculus repens L., Triglochin maritimum L., Stratiotes aloides L., Utricularia vulgaris L., Lemna minor L., etc. In the flora of the study area, four types of plant communities were found, with the dominance of representatives of the following families: Poaceae, Typhaceae, Cyperaceae, Ranunculaceae, Amaryllidaceae, Butomaceae, and Lentibulariaceaespanning several kilometres. Comparative analysis of macrophyte floras at four different sites illustrated similarity between phytocenoses. The plant flora of the study area includes 105 species belonging to 65 general and 38 families. Dicotyledonous plants are represented by 78 species, monocotyledones plants by 27 species. The ratio of dicotyledons to annuals was 1:2.9. On average, each genus is represented by 2.3 species, species saturation of families is characterised by the average index, and is 9.5.