Historical persistence and isolation by distance of

Context Empirical studies of intraspecific genetic diversity and population structure can inform the evolutionary demographic history individual species landscapes at bioregional level. Aims We aimed to assess variation macroevolutionary microevolutionary temporal scales for Mirbelia viminalis, a key present on Hamersley Range in ancient highly diverse landscape Pilbara bioregion northwest Western Australia. Methods sampled extant populations assessed using sequences (chloroplast DNA, 1759 base pairs) microsatellite markers (nuclear 15 loci) data. Key results Significant phylogeographic lack historical signals contraction or expansion suggest persistence. Moderate chloroplast haplotype (h = 15) moderate divergence among haplotypes indicates degree connectivity via seed dispersal across central Range. Levels nuclear were low (allelic richness 3.554, expected heterozygosity 0.489, observed 0.462) depauperate compared another member genus further south Midwest region. Nuclear revealed strong signal isolation by distance with localised admixture some contemporary clustering along north-west south-east transect Conclusions Low may be related recent reductions size M. viminalis. Historical persistence few barriers other than geographic common members Fabaceae