Variation in herbivory within and among plants of Daphne laureola (Thymelaeaceae): correlation with plant size and architecture

The evolutionary implications of plant-herbivore relationships cannot be understood without elucidating (I) why all individuals in a plant population are not equally damaged, and whether differences in herbivory levels are random, relate to environmental conditions or depend on intrinsic (i.e. potentially heritable) plant features and (2) whether differential herbivory has fitness-related consequences for either the plant, the herbivores, or both (reviewed in Karban 1992; and Marquis 1992). Some recent studies have focused on characteristics extrinsic to individual plants, such as microhabitat conditions (Lincoln & Mooney 1984; Bowers et a/. 1992; Dudt & Shure 1994), recent herbivory history (McCrea & Abrahamson 1987) and interaction with natural enemies (Moran 1984; Hare 1992; Ohsaki & Sato 1994). Other analyses have considered relationships between herVariation in herbivory within and among plants of Daphne laureola (Thymelaeaceae): correlation with plant size and architecture