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Evolutionary history biases inferences of ecology and environment from δ13C but not δ18O values

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  • Kirsty M. Edgar

    (University of Birmingham)

  • Pincelli M. Hull

    (Yale University)

  • Thomas H. G. Ezard

    (University of Southampton
    University of Southampton Waterfront Campus)

Abstract

Closely related taxa are, on average, more similar in terms of their physiology, morphology and ecology than distantly related ones. How this biological similarity affects geochemical signals, and their interpretations, has yet to be tested in an explicitly evolutionary framework. Here we compile and analyze planktonic foraminiferal size-specific stable carbon and oxygen isotope values (δ13C and δ18O, respectively) spanning the last 107 million years. After controlling for dominant drivers of size-δ13C and size-δ18O trends, such as geological preservation, presence of algal photosymbionts, and global environmental changes, we identify that shared evolutionary history has shaped the evolution of species-specific vital effects in δ13C, but not in δ18O. Our results lay the groundwork for using a phylogenetic approach to correct species δ13C vital effects through time, thereby reducing systematic biases in interpretations of long-term δ13C records—a key measure of holistic organismal biology and of the global carbon cycle.

Suggested Citation

  • Kirsty M. Edgar & Pincelli M. Hull & Thomas H. G. Ezard, 2017. "Evolutionary history biases inferences of ecology and environment from δ13C but not δ18O values," Nature Communications, Nature, vol. 8(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01154-7
    DOI: 10.1038/s41467-017-01154-7
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