We are investigating the evolutionary and ecological history of the world’s more than 400 oak species (Quercus, Fagaceae). Working with collaborators in Mexico, Europe, China, and the United States, we have assembled a DNA database for more than half of the recognized oak species using a genomic method that samples thousands of genes for each oak that is sampled. Combining these molecular data with data on climate, soils, plant traits, and community compositions allows us to untangle the complicated history of population divergence, hybridization, adaptation, and convergence that shapes oak biodiversity.
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