Dealing with uncertainty: a case study of controlling insect populations in natural ecosystems

Abstract

This paper analyses the political process for handling an outbreak of an insect causing human allergic reactions. In the southern part of the Swedish island Gotland in the Baltic Sea, an outbreak of the northern pine processionary moth, Thaumetopoea pinivora, has occurred. With regard to the human nuisance and long-term effects on the tourist industry, demands have been raised for intervention to reduce and control the insect population. At the same time, there have been warnings against treating the insect population because there are knowledge gaps concerning the wider ecological consequences, including effects on biodiversity. This paper analyses the political process and its problem-solving efforts. Of particular interest is how it dealt with the issue of uncertainty. It was found that the uncertainty associated with the issue hindered the development of a shared understanding of the problem and a possible solution. There seems to be a growing need in society to develop the institutional capacity to handle complex issues that cross different sectors, regulatory frameworks and policy targets.

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