Aleksandr Egorov, St. Petersburg State University
Rimvys Vasaitis, Swedish University of Agricultural Sciences
Arctic ecosystems are quite vulnerable to disturbances associated with the invasion of undesirable species; however, harsh climatic conditions represent not only a barrier to the penetration of undesirable species, but also act as a barrier to mass outbreaks of pests and epidemics of diseases. Undesirable plants can easily be carried to the north by different means. At the first stage of invasion, the spread of invasive plants is likely to be limited by rural places. This session will discuss, do invasive species represent a real threat to the local ecosystems at this stage? How the situation will develop in future under conditions of changing climate and increasing human disturbance?