Cycles of external dependency drive evolution of avian carotenoid networks
AffiliationUniv Arizona, Dept Ecol & Evolutionary Biol
MetadataShow full item record
PublisherNATURE PUBLISHING GROUP
CitationBadyaev, A. V., Posner, A. B., Morrison, E. S., & Higginson, D. M. (2019). Cycles of external dependency drive evolution of avian carotenoid networks. Nature communications, 10(1), 1596.
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AbstractAll organisms depend on input of exogenous compounds that cannot be internally produced. Gain and loss of such dependencies structure ecological communities and drive species' evolution, yet the evolution of mechanisms that accommodate these variable dependencies remain elusive. Here, we show that historical cycles of gains and losses of external dependencies in avian carotenoid-producing networks are linked to their evolutionary diversification. This occurs because internalization of metabolic controls-produced when gains in redundancy of dietary inputs coincide with increased branching of their derived products-enables rapid and sustainable exploration of an existing network by shielding it from environmental fluctuations in inputs. Correspondingly, loss of internal controls constrains evolution to the rate of the gains and losses of dietary precursors. Because internalization of a network's controls necessarily bridges diet-specific enzymatic modules within a network, it structurally links local adaptation and continuous evolution even for traits fully dependent on contingent external inputs.
NoteOpen access journal
VersionFinal published version
SponsorsUniversity of Arizona Libraries Open Access Publishing Fund; Berkeley Research Impact Initiative (BRII) - UC Berkeley Library; National Science Foundation [DEB-0075388, IBN-0218313, DEB-0077804]; David and Lucille Packard Foundation