Stephen J. Simpson, Ph.D.
Professor of Entomology
University of Oxford
Born in 1957 in Melbourne, Australia
Studied Entomology at the Universities of Queensland and London
The Geometric Analysis of Human NutritionDavid Raubenheimer and I have developed a new conceptual and experimental approach for studying food selection, food intake and the physiological processing of foods. During our stay in Berlin we will write a book that applies this approach to the evolution and current problems of human nutrition.
Simpson, S. J. and D. Raubenheimer. "The Hungry Locust." Advances in the Study of Behavior 29 (2000): 1-44.
Simpson, S. J., A. R. McCaffery, and B. Haegele. "A behavioural analysis of phase change in the desert locust." Biological Reviews 74 (1999): 461-480.
Simpson, S. J. and D. Raubenheimer. "The geometric analysis of nutrient-allelochemical interactions: a case study using locusts." Ecology 82 (2001): 422-439.
Tuesday Colloquium, 28.01.2003
Targets, Rails and Compromises: Dealing with Nutritional Complexity
Among the most complex challenges facing an animal is the task of satisfying its nutritional requirements. In summary, the problem is that most animals (people included) need simultaneously a large number of nutrients, each at its own specific level and in particular balance with other nutrients. These needs are not constant, but change throughout the animal's life. Also, the nutrient content of foods varies greatly both in space and time, and to make matters worse, some foods, notably plants and prey animals, often contain toxins specifically evolved to dissuade other organisms from eating them. The problem, then, is one of matching changing, uncertain, and often hostile nutrient availability to multiple, changing and often uncertain nutrient requirements.
While animals have evolved effective solutions for dealing with the complexity of nutrition, explaining such solutions remains a considerable challenge to nutritional scientists. We present a new approach developed specifically for exploring the complex, interactive nature of nutrition. After introducing the approach, we will provide a number of examples illustrating instances where it has been used to address specific biological problems. These include comparative studies of animal nutrition; explorations of the behavioural and physiological mechanisms involved in feeding; normative studies of animal adaptation; and applications to complex interactions in community ecology.