Coastal upwelling is linked to temporal genetic variability in the acorn barnacle Balanus glandula

摘要: Dispersal and recruitment are central processes that shape the geographic temporal distributions of populations marine organisms. However, significant variability in factors such as reproductive output, larval transport, survival, settlement success can alter genetic identity recruits from year to year. We designed a spatial sampling protocol test for heterogeneity among adults multiple time points along similar 400 km stretch Oregon (USA) coastline. In total, 2824 adult recruiting Balanus glandula were sampled between 2001 2008 9 sites spanning coast. Consistent with previous studies, we observed high mitochondrial DNA diversity at cytochrome oxidase I locus (884 unique haplotypes) little no population structure (Phi(ST) = 0.00026, p 0.170). subtle but shifts composition classes 0.00071, 0.035), Phi(ST) varied These correlated yearly differences strength coastal upwelling (p 0.002), greater years weaker upwelling. Higher levels barnacle also < 0.001). data suggest hypothesis low intensity maintains more local larvae close shore, thereby shaping rate classes.