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Updated: Jun 11, 2025
07:54
Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions
Published on: March 9, 2021
2.9K
Temperature-dependent predation predicts a more reptilian future.
John M Grady1,2, Jacob L Amme2, Kiran Bhaskaran-Nair2
1Living Earth Collaborative, Washington University in St. Louis, St, Louis, MO, USA.
Biorxiv : the Preprint Server for Biology
|September 30, 2024
Summary
Vertebrate diversity shifts from endotherms (mammals, birds) at poles to ectotherms (reptiles, amphibians) in tropics. Warming trends predict a future with more reptiles, altering global biodiversity patterns.
Area of Science:
- Ecology
- Zoology
- Climate Change Biology
Background:
- Global biodiversity generally increases towards the tropics.
- Thermoregulatory strategies (endothermy vs. ectothermy) may influence this pattern.
- Understanding these shifts is crucial for predicting future ecosystem compositions.
Purpose of the Study:
- To quantify latitudinal patterns of terrestrial vertebrate diversity based on thermoregulatory strategy.
- To investigate the mechanistic link between temperature, thermoregulation, and predator-prey interactions.
- To forecast future diversity shifts under climate warming.
Main Methods:
- Synthesized distribution data for over 30,000 terrestrial vertebrate species.
- Quantified changes in species richness and community composition along latitudinal gradients.
- Conducted over 4,500 automated video tracking trials to analyze predator-prey interactions and thermal sensitivity.
Main Results:
- Observed a significant shift from endotherm dominance (mammals, birds) in colder, higher-latitude regions to ectotherm dominance (reptiles, amphibians) in warmer, tropical regions.
- Demonstrated that thermal sensitivity of locomotion influences predator-prey dynamics, favoring endotherms in cold and ectotherms in warm conditions.
- Endotherms were observed using thermal cues to anticipate prey behavior, affecting foraging success.
Conclusions:
- Vertebrate diversity patterns are strongly influenced by thermoregulatory strategy and temperature gradients.
- Predator-prey interactions are mechanistically linked to temperature, shaping community composition.
- Projected future warming will likely lead to an increase in ectothermic (reptilian) dominance in global vertebrate diversity.
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