Representing and regulating nature: boundary organisations, portable representations, and the science-policy interface

The interaction between science and policy in transboundary environmental regulation is dynamic. By elaborating on the concepts of boundary organisations and portable representations, I shed light on how science-based policy and policy-relevant science are co-produced. This perspective is then put to use in an analysis of the scientific representation and political regulation of two different environmental issues: ground-level ozone and biodiversity. Portable representations function as a link between experts and policy-makers. By means of portable representations, nature is not only measured and represented but also made governable. Portable representations seemed to strengthen the credibility of both scientific assessments and policy. Science makes itself matter by formally separating itself from policy considerations, although the two are at the same time integrated through portable representations from boundary organisations.