Boundary spanning activities in the biodiversity science-policy interface are urgently needed. Effective science communication and uptake of scientific findings by policymakers is crucial for a successful, cross-scale policy implementation. For this, national platforms promoting knowledge exchange between different stakeholder groups are key. Established in 2009, the Network-Forum on Biodiversity Research Germany (NeFo) until 2018 has organized more than 40 workshops bringing together actors from science, policy and society. In this paper, we present a network and cluster analysis of these NeFo workshops. Based on this, we discuss the importance of sciencepolicy interface projects and networks as knowledge brokers and boundary organizations, as well as challenges in using network analysis as a tool for evaluating workshop impacts. Based on the network analysis outcomes as well as experiences in the conduction of workshops, recommendations to strengthen the innovation impact of networking efforts are drawn.