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I am a theoretical ecologist interested in population and community dynamics. My research areas encompass: (1) The spatio-temporal dynamics of nonlinear ecological systems for antagonistic interactions (predator-prey, host-parasite, and disturbance-recovery), particularly approaches to scale-up systems from small, individual, levels to more aggregated, population, levels, and approaches to incorporate implicitly in simple (highly aggregated) temporal models the effect of smaller scales. Similar questions are being addressed on the dynamics of infectious diseases in networks. (2) The response of nonlinear ecological systems to environmental variability and the application of nonlinear time series analysis to identify key environmental drivers and to predict responses. In particular, the nonlinear dynamics of infectious diseases in response to climate variability and climate change, including aspects of evolutionary change in pathogens. The main disease under study is cholera, but work is also underway on malaria and influenza. (3) The relationship between structure and dynamics in large networks of ecological interactions (consumer-resource and parasitic links).
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