Macroecological patterns of trait variation

I am increasingly interested in unravelling the macroecological patterns of trait variation, with an emphasis on insular body size evolution in vertebrates (Island rule) and intraspecific body size variation across thermal and latitudinal clines (Bergmann´s rule). I am particularly fascinated by the ecological and evolutionary adaptations of insular species to thrive in resource-poor, predator-free island environments, and whether phenotypic variability confers an advantage for insular colonizers  or rather it is  constrained by a founder’s effect. Understanding intraspecific patterns of trait variation will help us anticipate organisms’ responses to changing environmental conditions (e.g..: increased temperatures or reduced primary productivity).