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The emergence of heterotrophy in an eco-evolutionary model: modelling trophic transitions in a resource-based framework with naturally-bounded trait distributions

  • Roger CroppEmail author
  • John Norbury
Original Paper

Abstract

A plankton eco-evolutionary model with an alga that has the metabolic pathways to allow it to function as an autotroph or heterotroph is considered. Ecological constraints dictate that the traits that describe the feeding preferences and abilities of the alga naturally have bounded distributions. The trait distributions are then non-normal, and evolve with the population as it changes its trophic behaviour from an autotroph to a heterotroph. A key result of the simulations is that the populations remain in ecological stasis for many generations while the trait mean slowly adapts—only at the conclusion of this transition does herbivory emerge. After initially adapting to improve its competitive performance as an autotroph, the adapting population eventually emerges as a heterotroph having maximised its share of the resources at the expense of its prey, previously its competitor.

Keywords

Eco-evolution Resource-based model Gamma-distributed traits Naturally-bounded traits 

Notes

Acknowledgements

The authors thank two very thorough and constructive anonymous reviewers for their contributions to publishing this manuscript.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflicts of interest.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.School of Environment and ScienceGriffith UniversityNathanAustralia
  2. 2.Mathematical InstituteUniversity of OxfordOxfordUK

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