Traits explain sorting of C4 grasses along a global precipitation gradient

Emma Jardine, Colin Osborne & Gavin Thomas
Species distributions are closely associated with moisture availability, but the underlying mechanisms remain unresolved. Drought relations are especially important for plants such as C4 grasses that dominate seasonally dry ecosystems. Here, we test the hypothesis that C4 grass species sampled across global precipitation gradients show variation in survival under drought that can be explained by their traits. Our experiment subjected 18 C4 grass species to a lethal drought under controlled environmental conditions. The number of...
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