English: "Kurgans (burial mounds, barrows) are earth or earth-stone mounds built from a local

substrate (predominantly loess) by ancient cultures and used as burial sites. Kurgans are an integral part of all Eurasian steppe landscapes (Peto and Barczi 2011). Across the Ukrainian steppe, large numbers of barrows were preserved until today, whereas across the Eurasian steppe belt, many kurgans were destroyed by ploughing or archaeological excavations. The current number of kurgans in Ukraine is estimated at approximately 150,000 (Mozolevskiy and Polin 2005). In southern Ukraine they were built 700– 5000 years ago, most of them by the Yamna Culture (Chernyakov 1993), at a time when the landscape was dominated by pristine steppe. The size of kurgans varies—their diameter can range from 10 to 110 m and their height can be from 1 m up to 15 m (Mozolevskiy and Polin 2005)."

https://www.researchgate.net/publication/298898621_Isolation_and_patch_size_drive_specialist_plant_species_density_within_steppe_islands_a_case_study_of_kurgans_in_southern_Ukraine