Research interests We explore the structure, complexity and dynamics of food webs. We use optimal foraging theory to define the rules linking predators and prey. We predict the impacts of multiple simultaneous threats to ecosystems. We study the local adaptation of plasticity in real ponds and in daphnia and algae. We explore the genes that underpin plasticity and local adaptation. We work with predators, metals and algae biotechnology. We study the conservation and demography of parrots in Central America and the Caribbean. We link this to socioeconomics and trade-offs in conservation management. We study trade networks. We build models.