Our aim was to investigate the species richness and diversity of a loess grassland influenced by
the digging of the lesser blind mole rat [Nannospalax (superspecies leucodon)] and to study the effect of
this disturbance to diversity. The study was conducted in the Külső-gulya loess grassland (Körös-Maros
National Park), which is unique in Hungary due to its excellent soil quality and the large spatial extent
of natural loess meadow steppe.
We recorded the cover of species in 50x50 cm plots. Altogether 12 plots were sampled on mounds of
mole rat and 12 plots as a control in the area with no mounds. Differences in species richness, Shannondiversity,
evenness and total cover between disturbed and control plots were tested by One-Way
ANOVA. There were no significant difference neither in the number of species, nor in the Shannondiversity
and evenness. There were differences in the species composition detected by PCO ordination.
We can conclude that the presence and disturbance of the mole rat influence the composition of the
grassland significantly but it does not cause a difference in the species richness, diversity and total cover.
Our results suggest that this grassland has adapted to these natural disturbances
