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Evolution of New Traits in Microbes01:24

Evolution of New Traits in Microbes

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Resurrection of Dormant Daphnia magna: Protocol and Applications
07:37

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Published on: January 19, 2018

Rapid contemporary evolution and clonal food web dynamics.

Laura E Jones1, Lutz Becks, Stephen P Ellner

  • 1Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853-2701, USA.

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
|May 6, 2009
PubMed
Summary
This summary is machine-generated.

Microevolutionary changes in prey traits significantly impact ecological community dynamics, influencing stability and species coexistence. Understanding these eco-evolutionary processes is key to predicting ecosystem behavior.

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Area of Science:

  • Ecology
  • Evolutionary Biology
  • Population Dynamics

Background:

  • Ecological community interactions are influenced by character evolution and changes in population size.
  • Asexual and cyclically parthenogenetic organisms, like microalgae and rotifers, offer simplified models for studying eco-evolutionary dynamics due to short generations and simple genetics.
  • Within-species clonal dynamics can profoundly affect population dynamics when clones exhibit differing traits relevant to interspecific interactions.

Purpose of the Study:

  • To investigate how microevolutionary trait differences within prey populations influence the stability of predator-prey systems.
  • To explore the broader impact of increased evolutionary potential on community dynamics in a multi-predator, multi-prey model.
  • To illustrate how heritable phenotypic changes at the microevolutionary level affect community-level dynamics and species persistence.

Main Methods:

  • Modeling a predator-prey system with two prey genotypes, using empirical data to parameterize defense traits against predation.
  • Developing a generalized community model incorporating multiple predator and prey genotypes to assess the effects of evolutionary potential.
  • Analyzing how variations in trait differences and evolutionary capacity influence system stability and coexistence.

Main Results:

  • The extent of variation in prey defense traits critically determines the stability or instability of predator-prey dynamics.
  • Increased potential for evolution in prey populations can significantly alter community dynamics.
  • Microevolutionary 'details,' such as the capacity for heritable phenotypic change, have substantial consequences for community structure and species persistence.

Conclusions:

  • Microevolutionary processes are integral to understanding ecological community dynamics and stability.
  • The interplay between evolution and ecology, particularly in organisms with rapid generation times, provides crucial insights into ecosystem function.
  • Heritable phenotypic variation is a key factor shaping community-level outcomes, including species coexistence and persistence.