Multivariate selection mediated by aridity predicts divergence of drought‐resistant traits along natural aridity gradients of an invasive weed

What is it about?

Geographic environmental variation underlies local adaptation, yet identifying environmental factors that underlie local adaptation is challenging. We show that aridity is a major driver of adaptive differentiation among invasive capeweed populations, with drought-mediated selection driving predictable patterns of geographic differentiation among traits facilitating drought escape and tolerance.

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