Oonsie

Biggs

PhD

Researcher

+46 8-674 7651

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  • Her research focuses on regime shifts — large, abrupt, long-lasting changes that can have dramatic impacts on human economies and societies
  • She initiated and co-leads the Southern African Program on Ecosystem change and Society, a network of leading social-ecological researchers working in southern Africa
  • She has authored or co-authored over 30 scientific articles and 20 book chapters

Reinette (Oonsie) Biggs' research focuses on regime shifts and contributing practical scientific theory, methods and insights that can improve society's ability to anticipate high-impact tipping points, and build resilience to undesirable changes

Reinette (Oonsie) Biggs is a Society in Science Fellow funded by the Branco Weiss foundation. She is also a Research Fellow in the Centre for Studies in Complexity at Stellenbosch University in South Africa.

Her research focuses on regime shifts — large, abrupt, long-lasting changes in the dynamics of coupled social-ecological systems that can have dramatic impacts on human economies and societies. Biggs aims to contribute practical scientific theory, methods and insights that can improve society's ability to anticipate high-impact tipping points, and build resilience to undesirable changes. Her core research activities focus on the following key areas:

- Developing a Regime Shifts Database to provide a high-quality synthesis of different types of regime shifts that have been documented in social-ecological systems, their impacts on ecosystem services, and management options.

- Developing methods for assessing which areas on Earth are most vulnerable to particular regime shifts, using GIS and remote sensing methods.

- Examining the economic trade-offs associated with balancing the risk of potential regime shifts against the benefits of ecosystem exploitation, in collaboration with researchers at the Beijer Institute for Ecological Economics.

Biggs also initiated and co-leads the Southern African Program on Ecosystem change and Society, a network of leading social-ecological researchers working in southern Africa to develop new theory and tools and grow capacity in the SES field, and one of the core case studies within the ICSU Program on Ecosystem Change and Society (PECS).

Biggs completed her PhD studies at the University of Wisconsin-Madison in 2008. Her thesis Uncertainty, learning and innovation in ecosystem managemen included the use of Hierarchical Bayesian Models to show how uncertainties about the nature of ecological relationships may be highlighted by integrating results from multiple studies.

Another aspect of her dissertation work focused on the question of whether regime shifts can be detected (through approaches such as increasing variance) with sufficient lead time to change management in ways that avert undesirable regime shifts.

She also investigated, using social science methodologies, factors that encourage innovation and transformation in ecosystem management based on case studies in South Africa, Wisconsin and Sweden.

Prior to her PhD studies, Biggs spent four years at the Council for Scientific and Industrial Research in Pretoria, South Africa, working on the Southern African Millennium Ecosystem Assessment.

She was particularly involved in the scenario planning aspects of the assessment, as well as issues of cross-scale links. Her Masters thesis, which was tied to the Millennium Assessment, involved the development of a new policy-relevant indicator for assessing biodiversity condition, namely the Biodiversity Intactness Index (BII), published in Nature in 2005.

Biggs has authored or co-authored over 30 scientific articles and 20 book chapters.

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Publications by Biggs, Oonsie

The bii4africa dataset of faunal and floral population intactness estimates across Africa’s major land uses

Journal / article | 2024

Hayley Susan Clements, Emmanuel Do Linh San, Gareth Hempson, Birthe Linden, Bryan Maritz, Ara Monadjem, Chevonne Reynolds, Frances Siebert, Nicola Stevens, Reinette Biggs, Alta De Vos, Ryan Blanchard, Matthew F. Child, Karen Esler, Maike Hamann, Ty Loft, Belinda Reyers, Odirilwe Selomane, Andrew L. Skowno, Tshegofatso Tshoke, Diarrassouba Abdoulaye, Thierry Aebischer, Jesús Aguirre Gutiérrez, Graham Alexander, Abdullahi H. Ali, David G. Allan, Esther Ekua Amoako, Samuel Angedakin, Edward Aruna, Nico Avenant, Gabriel Badjedjea, Adama Bakayoko, Abraham Bamba-kaya, Michael F. Bates, Paul Bates, Steven Belmain, Emily Bennitt, James Bradley, Chris A. Brewster, Michael B. Brown, Michelle Brown, Josef Bryja, Thomas M. Butynski, Filipe Carvalho, Alan Channing, Colin A. Chapman, Callan Cohen, Marina Cords, Jennifer D. Cramer, Nadine Cronk, Pamela M. K. Cunneyworth, Fredrik Dalerum, Emmanuel Danquah, Harriet Davies-Mostert, Andrew de Blocq, Yvonne Anne de Jong, Terrence C Demos, Denys Christiane, Chabi A. M. S. Djagoun, Thomas Doherty-Bone, Marine Drouilly, Johan T. du Toit, David A. Ehlers Smith, Yvette C. Ehlers Smith, Seth J. Eiseb, Peter J. Fashing, Adam W. Ferguson, José María Fernández-García, Manfred Finckh, Claude Fischer, Edson Gandiwa, Philippe Gaubert, Jerome Gaugris, Dalton J. Gibbs, Jason Gilchrist, Jose María Gil-Sánchez, Anthony N. Githitho, Peter S. Goodman, Laurent Granjon, J. Paul Grobler, Bonginkosi C. Gumbi, Vaclav Gvozdik, James Harvey, Morgan Hauptfleisch, Firas Hayder, Emmanuel M. Hema, Marna Herbst, Mariano Houngbédji, Brian J. Huntley, Rainer Hutterer, Samuel T. Ivande, Kate Jackson, Gregory F.M. Jongsma, Javier Juste, Blaise Kadjo, Prince K. Kaleme, Edwin Kamugisha, Beth Kaplin, Humphrey N. Kato, Christian Kiffner, Duncan Kimuyu, Robert M. Kityo, N’goran G. Kouamé, Marcel Kouete T, Aliza le Roux, Alan T. K. Lee, Mervyn C. Lötter, Anne Mette Lykke, Duncan N. MacFadyen, Gacheru P. Macharia, Kim, Themb’alilahlwa A. M. Mahlaba, David Mallon, Mnqobi Lifa Mamba, Claude Mande, Rob A. Marchant, Robin A. Maritz, Wanda Markotter, Trevor McIntyre, John Measey, Addisu Mekonnen, Paulina Meller, Haemish Melville, Kevin Mganga, Michael G. L. Mills, Liaan Minnie, Alain Didier Missoup, Abubakr Mohammad, Nancy N. Moinde, Bakwo Fils Eric Moise, Pedro Monterroso, Jennifer F Moore, Simon Musila, Sedjro Gilles Armel NAGO, Maganizo W. Namoto, Fatimata Niang, violaine nicolas, Jerry B. Nkenku, Evans Ewald Nkrumah, Gonwouo L. Nono, Mulavwa M. Norbert, Katarzyna Nowak, Benneth Obitte, Arnold D. Okoni-Williams, Jonathan Onongo, M. Justin O'Riain, Samuel Temidayo Osinubi, Daniel M. Parker, Francesca Parrini, Mike J. S. Peel, Johannes Penner, Darren Pietersen, Andrew Plumptre, Damian W. Ponsonby, Stefan Porembski, R. John Power, Frans Gustav Theodor Radloff, Ramugondo V. Rambau, Tharmalingam Ramesh, Leigh Richards, Mark-Oliver Rödel, Dominic P. Rollinson, Francesco Rovero, Mostafa A. Saleh, Ute Schmiedel, Corrie Schoeman, Paul Scholte, Thomas L. Serfass, Julie Teresa Shapiro, Sidney Shema, Stefan J. Siebert, Jasper A. Slingsby, Alexander Sliwa, Hanneline Smit-Robinson, Etotepe A. Sogbohossou, , Stephen Spawls, Jarryd P. Streicher, Lourens Swanepoel, Iroro Tanshi, Peter J. Taylor, William A. Taylor, Mariska te Beest, Paul T. Telfer, David Ian Thompson, ELIE TOBI, Krystal A. Tolley, Andrew A. Turner, Wayne Twine, Victor Van Cakenberghe, Frederik Van de Perre, Helga van der Merwe, Chris J. G. van Niekerk, Pieter Van Wyk, Jan A. Venter, Luke Verburgt, Geraldine Veron, Susanne Vetter, Maria (bat) S. Vorontsova, Thomas Wagner, Paul W. Webala, Natalie Weber, Sina M. Weier, Paula White, Melissa A. Whitecross, Benjamin J. Wigley, Frank J. Willems, Christiaan W. Winterbach, Galena M. Woodhouse. 2024. The bii4africa dataset of faunal and floral population intactness estimates across Africa’s major land uses. Scientific Data. https://doi.org/10.1038/s41597-023-02832-6

Sub-Saharan Africa is under-represented in global biodiversity datasets, particularly regarding the impact of land use on species’ population abundances. Drawing on recent advances in expert elicitation to ensure data consistency, 200 experts were convened using a modified-Delphi process to estimate ‘intactness scores’: the remaining proportion of an ‘intact’ reference population of a species group in a particular land use, on...