Population genetic analysis reveals barriers and corridors for gene flow within and among riparian populations of a rare plant

This study assessed the spatial genetic structure of a rare plant (Grevillea) situated along creeks and on floodplains in the Southwest Australian Floristic Region. The landscape features of this unique region and the life-history traits of this species have had profound impacts on its structure. Our results highlight that for conservation of riparian species, avoiding an impact to hydrodynamic processes is critical, as they play a vital role in species gene flow, and consequently, genetic diversity. Understanding this is important for managing threatened species, especially one in an international biodiversity hotspot such as the SAFR in Western Australia.