F. L. W ckers is Senior Researcher at the Centre for Terrestrial Ecology, Netherlands Institute of Ecology (NIOO-KNAW). He has been working in the field of functional biodiversity and conservation biological control for over 15 years. His research focuses on multitrophic interactions between plants, herbivores and their antagonists. As a central theme, Felix W ckers studies the role of plant-derived food supplements in these interactions. In order to obtain insight into the role of sugars in 'food for protection mutualisms' he takes a twin approach, addressing both characteristics of the plant...