Seascape genomics reveals fine‐scale patterns of dispersal for a reef fish along the ecologically divergent coast of Northwestern Australia

摘要: Understanding the drivers of dispersal among populations is a central topic in marine ecology and fundamental for spatially explicit management resources. The extensive coast Northwestern Australia provides an emerging frontier implementing new genomic tools to comparatively identify patterns across diverse extreme environmental conditions. Here, we focused on stripey snapper (Lutjanus carponotatus), which important recreational, charter-based customary fishers throughout Indo-West Pacific. We collected 1,016 L. carponotatus samples at 51 locations coastal waters ranging from Northern Territory Shark Bay adopted genotype-by-sequencing approach test whether realized connectivity (via larval dispersal) was related gradients hydrodynamics. Hydrodynamic simulations using CONNIE more detailed treatment Kimberley Bioregion provided null models comparison. Based 4,402 polymorphic single nucleotide polymorphism loci shared all individuals, demonstrated significant genetic subdivision between south within remaining, northern bioregions. More importantly, identified zone admixture spanning distance 180 km border Canning bioregions, including Buccaneer Archipelago adjacent waters, collectively experiences largest tropical tidal range some fastest currents world. Further testing generality this other shallow water species broader geographic ranges will be critical our understanding population dynamics structure taxa oceans.