Data from: Pollinator adaptation and the evolution of floral nectar sugar composition

Stefan Abrahamczyk, Michael Kessler, Daniel Hanley, Dirk N. Karger, Matthias P. J. Müller, Anina C. Knauer, Felix Keller, Michael Schwerdtfeger & Aelys M. Humphreys
A longstanding debate concerns whether nectar sugar composition evolves as an adaptation to pollinator dietary requirements or whether it is ‘phylogenetically constrained’. Here we use a modeling approach to evaluate the hypothesis that nectar sucrose proportion (NSP) is an adaptation to pollinators. We analyze ~2,100 species of asterids, spanning several plant families and pollinator groups (PGs), and show that the hypothesis of adaptation cannot be rejected: NSP evolves toward two optimal values, high NSP for...
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