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Temperature-induced maternal effects and environmental predictability.

Scott C Burgess1, Dustin J Marshall

  • 1School of Biological Sciences, University of Queensland, Brisbane QLD 4072, Australia. scott.burgess@uq.edu.au

The Journal of Experimental Biology
|June 24, 2011
PubMed
Summary
This summary is machine-generated.

Maternal effects influence species persistence. Warmer maternal temperatures in marine bryozoans led to offspring with higher dispersal and metamorphic success, suggesting adaptive maternal effects under environmental change.

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Area of Science:

  • Marine Biology
  • Ecology
  • Evolutionary Biology

Background:

  • Maternal effects can impact species' ability to persist through environmental changes.
  • The adaptive significance of maternal effects is often unclear, depending on environmental correlations and selection pressures.

Purpose of the Study:

  • To investigate the adaptive significance of maternal effects in response to temperature variations.
  • To examine how maternal thermal environments influence offspring traits and fitness in marine bryozoans.

Main Methods:

  • Conducted a factorial experiment manipulating maternal and offspring environments (temperature) in Bugula neritina.
  • Monitored environmental temperature over time and analyzed time series data.
  • Assessed offspring size, dispersal potential, and metamorphic success.

Main Results:

  • Offspring from warmer-water-acclimated mothers were smaller but had increased dispersal potential and higher metamorphic success.
  • Maternal thermal environment predicted offspring's early-life temperatures.
  • Under frequency- or density-independent selection, warmer maternal temperatures appeared favored.

Conclusions:

  • Maternal thermal effects can confer adaptive advantages, particularly increased dispersal and metamorphic success.
  • Environmental predictability is crucial for understanding maternal effects' adaptive significance.
  • Future studies should integrate environmental predictability and both absolute and relative fitness measures.