Acknowledgements
The authors would like to thank Alexey Seregin and Marusya, thanks to whom the expedition to the source of the Dnieper River became possible and turned into a pleasant journey.
Disclosure statement
No potential conflict of interest was reported by the author(s).
Supplemental data
Supplemental data for this article can be accessed online at https://doi.org/10.1080/00173134.2024.2347651.