Seasonal water availability predicts the relative abundance of C3 and C4 grasses in Australia

Aim Numerous studies have examined the climatic factors that influence the abundance of C4 species within the grass flora (C4 relative species richness) in various regions throughout the world, but very few have examined the relative abundance of C4 vs. C3 grasses (C4 relative abundance). We sought to determine the climatic factors that influence C4 relative abundance throughout Australia