Assessment of the stakeholder groups opinion of the contribution to IAS management by different stakeholders. Differences were tested for significance by X²-test and Fisher’s exact tests – no differences detected. Significant differences between NU and NE were found in the “Farmers and Foresters” group (Kruskal-Wallis: F = 2.01; p = < 0.001). Abbreviations: GU = general public; NU = nature users; NE = nature experts.