2. Effects of pollen limitation on dispersal unit and seed traits
PL can quantitatively and qualitatively affect the reproductive success of plants dispersed by animals (Ashman et al. 2004a; Knightet al. 2005). In fact, most of the physiological mechanisms underlying these effects, especially the qualitative ones, are relatively unknown, and little information that exists has not yet been synthesized. For this reason, we summarize some of the main effects of PL on dispersal unit traits, focusing on the traits that could be related to seed dispersal.