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Related Experiment Video

Updated: Nov 23, 2025

Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions

Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions

Published on: March 9, 2021

Substrate thermal properties influence ventral brightness evolution in ectotherms.

Jonathan Goldenberg¹, Liliana D'Alba², Karen Bisschop^3,4

¹Evolution and Optics of Nanostructures group, Department of Biology, Ghent University, 9000, Ghent, Belgium. jonathan.goldenberg@ugent.be.

Communications Biology

|January 5, 2021

Summary

This summary is machine-generated.

Vipers living on hot substrates evolved bright bellies for efficient heat transfer. Integument brightness in these reptiles is influenced by substrate type, impacting their morpho-behavioral adaptations and ecological niche.

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Area of Science:

Ecology
Evolutionary Biology
Herpetology

Background:

The thermal environment significantly influences ectotherm adaptations.
Heat transfer occurs via conduction and radiation, with substrate properties playing a key role.
Integumentary optical properties, like brightness, can affect heat absorption and thus influence evolutionary trajectories.

Purpose of the Study:

To investigate the relationship between substrate characteristics and the evolution of ventral and dorsal brightness in vipers (Squamata: Viperidae).
To determine the selective pressures driving the evolution of integumentary optical properties in relation to environmental factors.
To explore the ancestral state of ventral brightness and patterns of evolutionary convergence.

Main Methods:

Analysis of ventral and dorsal brightness from 4161 publicly available images across 126 viper species.
Statistical modeling to assess the influence of substrate type, latitude, body mass, activity pattern, and altitude on integument brightness.
Ancestral state estimation to reconstruct the evolutionary history of ventral brightness.

Main Results:

Substrate type, latitude, and body mass were strong predictors of ventral brightness, indicating adaptation for efficient heat transfer.
Substrate type also influenced dorsal brightness, but was associated with different selective forces like activity pattern and altitude.
Ancestral analysis suggested a moderately bright ancestral condition, with convergent evolution of brighter ventral coloration in some lineages.

Conclusions:

Vipers inhabiting hot, radiative, and conductive substrates have evolved brighter ventra for thermoregulation.
Integument brightness is a key trait shaped by environmental factors and selective pressures, impacting viper behavioral ecology.
The evolution of ventral brightness may have facilitated the diversification and exploitation of arid environments by vipers.