The ground squirrel (Spermophilus citellus) is in society living rodent tied to grassland habitats, which have been impacted and managed by humans over a long period. The National Park of Muránska planina is one of few areas in Slovakia, where the ground squirrel population is thriving, mainly thanks to particularly active management. The location of Biele vody has represented the largest population of grazing ground squirrels in Slovakia so far. The research carried out in 2019 focused on two localities, 10 km away from each other: Biele vody near Muráň and Podhrad near Tisovec. The objective of the research was to determine the influence of the ground squirrel population on the plant species composition through phytocenological methods. We recorded phytocenological records on the same square areas of 4 m2, always in adjacent pairs of areas with / without mound, 5 pairs in four types of management (intensive grazing by donkeys surrounded by a fence, grazing by cattle, grazing by sheep and mowing) and 5 controls records without the influence of the ground squirrel. Records were evaluated with JUICE phytocenology software. The results show that the ground squirrel itself has only a small effect on the plant species composition. However, it is an accompanying and an important factor increasing the heterogeneity of the environment. The largest species diversity (on average 27 species) was on an extensive sheep pasture in the Podhrad locality. The poorest area in terms of species was the fenced area with intensive donkey grazing in the Biele vody locality (on average 17 species). At the same time, we found the most nitrophilic weeds in intensively grazed areas. The best solution for the management of localities from the point of view of preserving the species diversity of flora is grazing by cattle or more extensive animal grazing. We recorded a total of 41 species directly at the mounds, of which 5 species with a frequency of more than 40%: Agrimonia eupatoria, Fragaria vesca, Achillea millefolium, Glechoma hederacea, Salvia pratensis. We did not record annual species for which the exposed soil represents ideal conditions for germination with the exception of isolated specimens of invasive weed Ambrosia artemisiifolia.