Ecological differentiation of diploid and polyploid cytotypes ofSenecio carniolicus sensu lato(Asteraceae) is stronger in areas of sympatry

Niche displacement can facilitate the formation of stable contact zones upon secondary contact of polyploids and their lower-ploid ancestors and/or lead to convergence of the cytotypes' niches after they have attained non-overlapping ranges. Niche displacement is essential for understanding ecological consequences of polyploidy.