Measuring population connectivity in natural systems is innately difficult. Connectivity in an ecological and evolutionary context is poorly understood, yet central to our understanding of what a population is. Research into understanding the modes and mechanisms of dispersal are key in physically fragmented seagrass meadows. Global seagrass losses parallel declines observed in corals and mangroves, yet we understand little about pollen and seed dispersal. Thus there is an urgent need to understand the role of dispersal in genetic and demographic population connectivity, metapopulation dynamics, large-scale disturbance, response to climate change, and speciation. This research explores the modes mechanisms and outcomes of dispersal.