Abstract
Elodea nuttallii (Planch.) H. St. John – an invasive species that actively expands the boundaries of its secondary range. This work presents the current and predicted future distribution of E. nuttallii in Europe. The spread of the species is observed in northern areas with a mild oceanic climate (with mild winters and cool, rainy summers) formed by Atlantic cyclones. E. nuttallii occurs in aquatic biotopes throughout the temperate climatic zone and partially occurs in the subtropical. It was established that the most important factors in determining the possibility of a plant’s spread are the amount of precipitation in the driest month, the minimum temperature of the coldest month, and altitude above the sea level. According to the data collected, the species is at its ecological optimum in most of Europe. Most of the changes expected in the next 100 years will take place in the next 30–40 years.