Patterns of temperature induced developmental plasticity in anuran larvae

Area of Science:

• Herpetology
• Developmental Biology
• Climate Change Ecology

Background:

• Amphibians exhibit phenotypic plasticity in metamorphosis timing and size in response to temperature fluctuations.
• Developmental plasticity is crucial for amphibian adaptation to changing thermal conditions, impacting vulnerability to climate change.

Purpose of the Study:

• To investigate the applicability of the intraspecific "temperature-size rule" across diverse anuran species.
• To determine if a population's thermal history influences its capacity for plastic responses in metamorphic traits.

Main Methods:

• A meta-analysis combining data from 25 studies on 18 anuran species.
• Analysis of thermal effects on tadpole size and age at metamorphosis.

Main Results:

• Warmer developmental temperatures led to faster metamorphosis and smaller size at metamorphosis in most populations (75%).
• The sensitivity of growth and developmental rates to temperature varied significantly between populations.
• Warm-adapted populations displayed reduced sensitivity to temperature variations, indicating lower developmental plasticity.

Conclusions:

• The thermal background of a population significantly impacts its capacity for developmental plasticity in response to temperature.
• Anuran species from warm-adapted populations may be more susceptible to climate change due to limited plasticity.
• Further research on species-specific thermal windows and temperature fluctuations is needed to fully understand developmental plasticity.