Study systems include
Metcalf, C.J.E, Hampson, K., Tatem, A., Klepac, P., Grenfell, B.T. and Bjørnstad, O.N. 2013. Persistence in epidemic metapopulations: quantifying the rescue effects for measles, mumps, rubella and whooping cough. PLoS ONE 8(9): e74696.
Nelson, W.A., Bjornstad, O.N. and Yamanaka, T. 2013. Recurrent insect outbreaks caused by temperature-driven changes in system stability. Science 341: 796-799.
Lavine, J., King, A.A., Andreassen, V. and Bjornstad, O.N. 2013. Immune boosting explains regime-shifts in prevaccine-era pertussis dynamics. PLoS ONE 8(8): e72086.
Metcalf, C.J.E., Graham, A.L., Huijben, S., Barclay, V.C., Long, G.H., Grenfell, B.T., Read, A.F. and Bjørnstad, O.N. 2011. Partitioning regulatory mechanisms of within-host malaria dynamics using the effective propagation number. Science 333: 984-988.
Ferrari, M.J., Grais, R.F., Conlan, A.J.K., Bharti, N., Bjornstad, O.N., Wolfson, L.J., Guerin, P.J., Djibo, A. and Grenfell, B.T. 2008. Seasonality, stochasticity and the dynamics of measles in sub-Saharan Africa. Nature 451: 679-684.
Viboud, C., Bjørnstad, O.N., Smith, D.L., Simonsen, L., Miller, M.A. and Grenfell, B.T. 2006. Synchrony, waves and spatial hierarchies in the spread of influenza. Science 312: 447-451.
I am involved in many collaborative studies on the outbreak and persistence of infectious disease.
My work has five interrelated themes:
- Ecological statistics: how can we test theories about spatiotemporal variation using abundance data?
- Population dynamics: how do the interactions between individuals and between individuals and the environment determine fluctuations in abundance? What are the effects of heterogeneity in the environment?
- Interactions between species: how do competition, predation and parasitism affect disease dynamics?
- Spatial dynamics: what causes regional synchrony or asynchrony in fluctuations?
- Ecology of infectious disease: how do host and pathogen characteristics affect incidence of disease?
I combine mathematical modelling with analysis of empirical data sets to generate and test hypotheses.
For more about Ottar Bjornstad, see:
- Introduction to Population Dynamics
This course explore the area of 'population dynamics' which seeks to describe the patterns of fluctuation in abundance in space and time, and seeks to understand the processes that that underlies these fluctuations. The course illustrate conceptual/theoretical aspects and discuss important applied issues (relating to biocontrol, pest managment, population harvesting). The computer labs use computational frameworks to simulate, validate and parameterize ecological models. The aim of the course is two-fold: the lectures will be centered on concepts and theories, the labs will focus on implementation and hands-on exercises with data and models. We will work through a variety of examples using real and simulated data sets.