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Resurrection of Dormant Daphnia magna: Protocol and Applications
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Post-dispersal astrobiological events: modelling macroevolutionary dynamics for lithopanspermia.

Maico Stochero Fiedler1, Milton de Souza Mendonça2

  • 1Programa de Pós-graduação em Ecologia, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Porto Alegre, RS, CEP 91501-970, Brazil. maicofiedler@yahoo.com.br.

Extremophiles : Life Under Extreme Conditions
|January 14, 2023
PubMed
Summary

Lithopanspermia, the spread of life between planets via meteorites, is an eco-evolutionary process. Post-arrival, speciation and evolvability drive macroevolutionary outcomes, potentially leading to universal theories of life's evolution.

Keywords:
AstroecologyEco-evolutionary dynamicsExtremophilesInterplanetary dispersal

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Area of Science:

  • Astrobiology
  • Evolutionary Biology
  • Planetary Science

Background:

  • Lithopanspermia proposes life's dispersal between celestial bodies via ejected rocks.
  • Existing models focus on biogeography and microevolutionary dynamics.
  • Arrival of extremophiles is not the conclusion but the beginning of new evolutionary trajectories.

Purpose of the Study:

  • To propose that eco-evolutionary dynamics shape macroevolutionary scenarios post-lithopanspermia.
  • To highlight speciation as a key factor in interplanetary dynamics.
  • To suggest a universal eco-evolutionary model for life in the universe.

Main Methods:

  • Conceptual analysis of eco-evolutionary principles applied to lithopanspermia.
  • Comparison with terrestrial long-distance dispersal models.
  • Exploration of extremophile persistence based on evolvability and ecological interactions.

Main Results:

  • Eco-evolutionary dynamics can lead to diverse macroevolutionary outcomes after extremophile arrival.
  • Speciation is crucial due to long interplanetary travel times and distances.
  • Extremophile persistence depends on evolvability (uninhabited planets) or ecological interactions (inhabited planets).

Conclusions:

  • Lithopanspermia, if proven, necessitates an eco-evolutionary framework.
  • Interplanetary dispersal may imply universal evolutionary theories.
  • A general eco-evolutionary model for extraterrestrial life is conceivable.