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Energetic mechanisms for coping with changes in resource availability.

Sonya K Auer1, Julia R Solowey1, Shreyas Rajesh1

  • 1Williams College, Williamstown, MA, USA.

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Summary
This summary is machine-generated.

Organisms with higher metabolic rates grow faster with abundant food but slower when food is scarce. This highlights how metabolic rate influences life history and adaptation to changing environments.

Keywords:
adaptive evolutionfitnessgrowthlife historymetabolic ratephenotypic plasticity

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Area of Science:

  • Ecology
  • Evolutionary Biology
  • Physiology

Background:

  • Organisms face increasing environmental changes due to human activities.
  • Metabolic rate, the rate of energy expenditure, is crucial for understanding how organisms respond to resource availability and environmental change.
  • Understanding organismal responses to resource fluctuations is vital for predicting persistence in changing ecosystems.

Purpose of the Study:

  • To investigate the role of energy metabolism in organismal responses to altered food availability.
  • To examine these responses across ecological (short-term) and evolutionary (long-term) timescales.
  • To synthesize findings across multiple species using a meta-analytical approach.

Main Methods:

  • A meta-analysis was conducted across multiple species.
  • The study analyzed the relationship between metabolic rate and life-history traits under varying food availability.
  • Investigated both phenotypic plasticity and evolutionary adaptation in metabolic rates.

Main Results:

  • Higher metabolic rates correlate with faster growth under high food conditions but slower growth when food is limited.
  • The relationship between metabolism and life-history traits is not static and varies with resource availability.
  • Organisms adapt to changing resources via phenotypic plasticity and evolutionary changes in metabolic rate.
  • Metabolic rate responses to food availability show diversity within populations and across lineages, indicating trade-offs.

Conclusions:

  • Metabolic rate plays a dynamic role in mediating organismal performance and persistence under changing resource conditions.
  • Organisms exhibit diverse strategies, including plasticity and adaptation, to cope with fluctuating food availability.
  • The study emphasizes the need to consider metabolic rate in conjunction with other physiological and behavioral traits in variable environments.