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Nutritional quality modulates trait variability.

Adrian Brückner1,2, Romina Schuster1, Katja Wehner1

  • 11Ecological Networks, Technische Universität Darmstadt, Schnittspahnstraße 3, 64287 Darmstadt, Germany.

Frontiers in Zoology
|December 12, 2018
PubMed
Summary
This summary is machine-generated.

Nutritional quality significantly impacts trait variation in organisms. Poor diets lead to lower average trait values and increased phenotypic variability, suggesting trait variation can signal food quality.

Keywords:
Archegozetes longisetosusFunctional traitsNutritional balanceNutritional ecologyOribatid mitesParthenogenesisThreshold elemental ratioTrait plasticity

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Area of Science:

  • Ecology
  • Evolutionary Biology
  • Physiology

Background:

  • Trait-based ecology often overlooks phenotypic diversity by focusing on species' trait means, not variability.
  • Phenotypic variation can stem from genetic or ecological factors, often difficult to disentangle in natural settings.
  • This study utilized a single genotype of the oribatid mite *Archegozetes longisetosus* to isolate ecological influences on trait variation.

Purpose of the Study:

  • To investigate how dietary changes induce trait variation in a model organism.
  • To assess the impact of nutritional quality on phenotypic trait means and variability.
  • To explore the relationship between trait variation and nutritional stoichiometry.

Main Methods:

  • A single genotype of *Archegozetes longisetosus* was subjected to 10 different dietary treatments.
  • Nine traits (life history, morphology, exocrine gland chemistry) were measured to assess phenotypic responses.
  • Carbon-to-nitrogen ratios were used to approximate nutritional quality.

Main Results:

  • Nutritional quality (C:N ratio) affected both the mean values and the variation of all measured traits.
  • Certain traits exhibited greater susceptibility to variation than others.
  • The threshold elemental ratio rule of element stoichiometry was applicable to phenotypic trait variation.

Conclusions:

  • Imbalanced diets resulted in reduced average trait values and increased trait variability.
  • A negative correlation was observed between trait means and trait variation, linked to nutritional quality.
  • Trait variation can serve as an indicator of general food quality and reveal trade-offs associated with imbalanced diets.