The effective management of invasive alien species is possible when it involves a community of the scientists, stakeholders, and the general public, leading to conflicting opinions, as groups may differ in knowledge, attitude to management methods and ethical beliefs. This master's thesis soughts to obtain information about knowledge of invasive non-native species, opinions on management methods and the level of their acceptance through a questionnaire addressed to nature conservation practitioners. The survey, which was conducted through an online questionnaire, thus coveres the responses of 114 persons working within the field of nature conservation in Slovenia. The results of the survey showcases no major differences in responses between decision makers and other stakeholders in the field of nature conservation. Knowledge about invasive alien species is high among the respondents, which is also reflected by the consistency of the answers with official definitions. Among the methods of disposal, the greatest support was given to the method of excavation for plants, the method of shooting adult specimens and sterilization or contraception for animals. Despite the relatively high knowledge, the answers to some of the questions did not lead to a consensus opinion, which points to different opinions that are not based on scientific knowledge but on the motives of emotions and ethical values. The research thus provides a starting point for further improving the management of invasive alien species based on scientific objectives rather than emotional attachments.
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