**About the Editors**

**Ryszard Gołdyn** (Prof. Dr.) is a hydrobiologist who deals with the functioning of aquatic ecosystems. He obtained his PhD based on phytoplankton research in dam reservoirs; he obtained his postdoctoral degree on the influence of preliminary reservoirs on the main reservoir, used for recreation and water sports. He is interested in the relationships between various groups of organisms, as well as the mutual relations between abiotic conditions and organisms, especially in the role of internal nutrient loading from bottom sediments and the influence of external loading from the catchment area. Recently, he has been working on the possibility of using nature-based solutions for lake restoration. His research covers several lakes that are subject to sustainable restoration. According to the Web of Science database, he is an author of 65 published papers and many more published in non-indexed journals and book chapters. He belongs to many scientific societies; he is the vice president of the Polish Hydrobiological Society and the national representative of SIL.

**Piotr Klimaszyk** (Dr.) obtained a PhD degree in freshwater ecology from the Adam Mickiewicz University of Poznan, Poland. His dissertation concerned the functioning of small water bodies in ´ diverse landscapes. He also conducted research on the influence of colonies of water birds on the transfer of nitrogen and phosphorus between aquatic and terrestrial ecosystems. He analyzed the evolution of soft-water lakes with isoetides and problems related to the reaction of water ecosystems to human impact. He is interested in environmental toxicology. According to ResearchGate he is an author of over 70 research articles and 12 chapters. Currently, he is an associate professor and the head of the Department of Water Protection at the Faculty of Biology of Adam Mickiewicz University in Poznan, Poland. ´
