Phylogeography of related diadromous species in continental and island settings, and a comparison of their potential and realized dispersal patterns

The importance and mechanisms of dispersal have long been subjects of evolutionary and ecological research (e.g. Bilton et al., 2001; Bohonak & Jenkins, 2003). The often reported mismatch between potential (i.e. assumed or predicted dispersal ability based on traits) for widespread dispersal and realized (i.e. empirical) patterns of geographically restricted dispersal and gene flow by stream invertebrates has been explained by high variance in rates and scales of dispersal either among species within a common landscape or within contrasting landscape settings for closely related taxa Australian Rivers Institute, Griffith University, Nathan, Qld 4111, Australia