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Following the Dynamics of Structural Variants in Experimentally Evolved Populations
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Operationalizing evolutionary transitions in individuality.

Yohay Carmel1, Ayelet Shavit2

  • 1Faculty of Civil and Environmental Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel.

Proceedings. Biological Sciences
|February 6, 2020
PubMed
Summary
This summary is machine-generated.

Evolutionary transitions in individuality (ETIs) were operationalized using four indicators. Inseparability emerged as a key, irreversible marker of higher-level individuality across diverse taxa.

Keywords:
eusocialitymajor evolutionary transitionsmulti-cellularity

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Area of Science:

  • Evolutionary biology
  • Developmental biology

Background:

  • Evolutionary transitions in individuality (ETIs) are central to understanding life's complexity.
  • Previous research lacked systematic operationalization of ETIs.

Purpose of the Study:

  • To systematically operationalize the concept of ETIs.
  • To quantitatively compare ETIs across taxa and levels of complexity.

Main Methods:

  • Devised four indicators: system size, inseparability, reproductive specialization, and non-reproductive specialization.
  • Conducted quantitative comparisons across multiple taxa and ETIs.

Main Results:

  • Inseparability plays a crucial role in ETIs, appearing irreversible.
  • Inseparability may signify the emergence of a higher-level individual.
  • Disparate groups show similar progression patterns during ETIs.

Conclusions:

  • The four indicators provide a framework for studying ETIs.
  • Inseparability is a critical factor in the evolution of individuality.
  • A universal pattern of progression exists for ETIs across different organisms.