• Biodiversity and agroecological transformation
• Interlinkages between biodiversity, food and climate
• Approaches and methods: Archetype analysis, multivariate statistics, dynamic modelling
• Regional focus: Europe, South America, Africa and global drylands

• Lead author IPBES Nexus Assessment
• Invited Speaker and Reviewer, e.g. IPCC, UNFCCC and UNCCD SPI
• Commissioned expert studies and policy papers, e.g. for UNEP (Global Environmental Outlook 4) and German Advisory Council on Global Change (WBGU)

Targeted agroecological action to enhance biodiversity in agricultural landscapes
Reversing the decline of farmland biodiversity lies at the heart of the United Nations' global vision of “Living in Harmony with Nature”, but there is currently little guidance on how it can be effectively achieved. Rooted in land system science, I synthesise complex interactions between species, habitats and agriculture. I focus on shared landscapes in which biodiversity and agriculture thoughtfully interact to provide insights into the suitability of specific agroecological farming approaches to guide policy towards most effective response options. Archetypes of social-ecological interactions, critical thresholds and catastrophic shifts in socio-ecological systems receive attention. I have worked in Europe, Latin America and Africa, often in drylands and high-mountain regions, in close collaboration with local communities, ministries, development agencies, international agricultural research centres and UN organisations.

I am a lead author of  IPBES Nexus Assessment, the thematic assessment of the interlinkages among biodiversity, water, food and health of the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services.

I coordinate Future Earth’s Global Land Programme (GLP) Working Group on “Archetype Analysis in Sustainability and Land Governance Research”.

I am an Associate Editor at Regional Environmental Change Journal.

• Associate Editor: Regional Environmental Change

• ResearchGate

Oberlack, C., Pedde, S., Piemontese, L., Václavík, T. and Sietz, D. (2023) Archetypes in support of tailoring land-use policies. Environ. Res. Lett. 18 060202, https://doi.org/10.1088/1748-9326/acd802

Sietz, D., Neudert, R. (2022) Taking stock of and advancing knowledge on interaction archetypes at the nexus between land, biodiversity, food and climate. Environ. Res. Lett. 17 113004, https://doi.org/10.1088/1748-9326/ac9a5c.

Sietz, D., Klimek, S. & Dauber, J. (2022) Tailored pathways toward revived farmland biodiversity can inspire agroecological action and policy to transform agriculture. Commun Earth Environ 3, 211, https://doi.org/10.1038/s43247-022-00527-1.

Piemontese, L., Neudert, R., Oberlack, C., Pedde, S., Roggero, M., Buchadas, A., Martin, DA., Orozco, R., Pellowe, K., Segnon, AC., Zarbá, L., Sietz, D. (2022) Validity and validation in archetype analysis: Practical assessment framework and guidelines. Environ. Res. Lett. 17(2) 025010, https://doi.org/10.1088/1748-9326/ac4f12.

Sietz, D., Conradt, T., Krysanova, V., Hattermann, FF., Wechsung, F. (2021) The Crop Generator: Implementing crop rotations to effectively advance eco-hydrological modelling. Agric. Syst. 193: 103183, https://doi.org/10.1016/j.agsy.2021.103183.

Eisenack, K., Oberlack, C., Sietz, D. (2021) Avenues of archetype analysis: roots, achievements, and next steps in sustainability research. Ecology and Society 26(2):31, https://doi.org/10.5751/ES-12484-260231.

Van den Elsen, E., Stringer, L., de Ita, C. ... Sietz, D., Christoforou, MA., Hadjimitsis, DG., Papoutsa, C., Quaranta, G., Salvia, R., Tsanis, I., Daliakopoulos, IN., Claringbould, H., De Ruiter, PC. (2020) Advances in understanding and managing catastrophic shifts in Mediterranean ecosystems. Frontiers in Ecology and Evolution 8:561101, Section Conservation, https://doi.org/10.3389/fevo.2020.561101.

Sietz, D., Frey, U., Roggero, M., Gong, Y., Magliocca, N., Tan, R., Janssen, P., Vaclavik, T. (2019) Archetype analysis in sustainability research: Methodological portfolio and analytical frontiers. Special Feature: Archetype Analysis in Sustainability Research. Ecology and Society 24(3):34.

Oberlack, C., Sietz, D., Bonanomi, EB., De Bremond, A., Dell'Angelo, J., Eisenack, K., Ellis, E., Epstein, G., Giger, M., Heinimann, A., Kimmich, C., Kok, M., Manuel-Navarrete, D., Messerli, P., Meyfroidt, P., Vaclavik, T., Villamayor-Tomas, S. (2019) Archetype analysis in sustainability research: Meanings, motivations, and evidence-based policy making. Special Feature: Archetype Analysis in Sustainability Research. Ecology and Society 24 (2):26.