03. July 2026

"This dissertation sheds light on the many experts, government officials, and members of civil society who do the crucial boundary work to turn knowledge into better decisions for our land". Sarah Velander (ZEF LAND group) graduates

Sarah Velander (ZEF LAND group) graduates on role of science–policy interfaces in the UN Convention to Combat Desertification (UNCCD)

Sara Velander defended her doctoral thesis on “Science-Policy Interfaces Navigating Complex Governance Systems: Institutional Collaboration and Knowledge Uptake for Coherent and Sustainable Land Use”

Her degree was granted by FB  06 - the Faculty of Education and Social Sciences / University of Münster under the supervision of Prof. Dr. Thomas Dietz (Primary supervisor, IfPol, University of Münster) and Prof. Dr. Christian Borgemeister (Secondary supervisor, Director at ZEF).

Sara Velander at her doctoral graduation
Sara Velander at her doctoral graduation © ZEF PR/Alma van der Veen
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Sara Velander about her research:

"My dissertation sheds light on the many experts, government officials, and members of civil society who do the crucial boundary work, often quietly and voluntarily, to turn knowledge into better decisions for our land. 

I am deeply grateful to the 100-plus practitioners across the globe and in Kenya who trusted me with their time and insight, and who helped me navigate the complex landscape of science–policy interfaces, which play a crucial role in addressing our interlinked global sustainability crises". 

What is her research about?

Sara's research looked at "science–policy interfaces" (or SPIs) – the panels, platforms, and organizations where scientists and policymakers come together to turn knowledge into action on complex environmental problems. Her focus was on land: how we farm, protect, and restore it, which sits at the heart of today's linked climate, biodiversity, and food crises.

She studied these SPIs at two levels. Globally, she examined how expertise matters in the UN Convention to Combat Desertification and mapped how 41 global SPI-related organizations – including the IPCC and IPBES – collaborate institutionally. Nationally, she did fieldwork in Kenya, mapping its polycentric SPI, with 78 organizations interacting across government, science, and civil society.

  • Whether expertise shapes policy depends on timing, trust, and politics – experts mostly influence decisions during brief "windows of opportunity".

  • Collaboration between SPI-related organizations helps overcome fragmented, siloed governance, but it is often informal and driven by individuals rather than built into the system.

  • Global knowledge only reaches local decisions when trusted "knowledge brokers" translate it for the local context.

  • Why it matters: solving interlinked land, climate, and biodiversity challenges needs co-designed, evidence-based decisions.

  • This research shows how to make SPIs more collaborative, inclusive, and connected across scales, and argues that managing this complexity should count as a core measure of their success, especially in the Global South which often faces the most acute land pressures.

German Ministry of Research, Technology and Space (BMFTR) under grant no. 01UU2002 for the LANUSYNCON project

Velander, S., Wagner, N., Biber-Freudenberger, L. (2026). Chapter 14: Science-Policy Interfaces and Sustainable Development: Institutionally Bridging the Knowledge–Action Gap. In: Brown, A., Gilgan, S. (eds) Rethinking Sustainability. Palgrave Macmillan, Cham. https://doi.org/10.1007/978-3-032-13886-6_14

Velander S and De Donà M (2024) Leveraging windows of opportunity for expertise to matter in global environmental governance: insights from the United Nations Convention to Combat Desertification. Front. Clim. 5:1325030. https://doi.org/10.3389/fclim.2023.1325030

Sara Velander, From silos to synergy: Mapping institutional collaboration across global environmental science–policy interfaces, Environmental Science & Policy, Volume 170, 2025, 104126, ISSN 1462-9011, https://doi.org/10.1016/j.envsci.2025.104126.

Sara Velander and Lisa Biber-freudenberger. Bridging Cross-Scale Science–Policy Interfaces for Coherent Land-Use Governance: Knowledge Co-Production and Uptake in Kenya's Polycentric System. 654 Environmental Policy and Governance, 2026; 36:654–673. https://doi.org/10.1002/eet.70073

bigs-dr@uni-bonn.de

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