Fig. 5. Diagrammatic representation of a cafeteria (following Grime etal. 1996; Cornelissen etal. 1999). If the model herbivores are snails, (a) the arena can be constructed on polystyrene and (b) the numbered grid should be wrapped in plastic, which is a substrate that snails like for crawling on. (c) Each leaf sample should be pricked on the grid, avoiding the contact with the plastic so as to prevent rotting.