Related Experiment Video
Updated: Feb 4, 2026
12:30
Testing Visual Sensitivity to the Speed and Direction of Motion in Lizards
Published on: December 14, 2006
12.0K
Main factors affecting lacertid lizard thermal ecology
Zaida Ortega1,2, Francisco Javier Martín-Vallejo2
1Postgraduate Program in Ecology and Conservation, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil.
Integrative Zoology
|September 26, 2018
Summary
Ectotherm thermal ecology reveals seasonality and altitude significantly impact thermoregulation effectiveness in lacertid lizards. Summer and high elevations present challenges for these reptiles adapting to environmental changes.
Area of Science:
- Zoology
- Ecology
- Climate Change Biology
Background:
- Thermal ecology of ectotherms is crucial for understanding organismal responses to environmental shifts.
- Climate change necessitates a deeper understanding of how species regulate body temperature.
- Lacertid lizards serve as a model system for studying thermoregulation strategies.
Purpose of the Study:
- To investigate factors influencing thermoregulation effectiveness in lacertid lizards.
- To analyze the impact of seasonality, altitude, body size, habitat, insularity, and climate on thermoregulation.
- To identify key drivers of thermoregulatory patterns in response to environmental variables.
Main Methods:
- Conducted three meta-analyses on lacertid lizard populations (71, 60, and 45 populations).
- Analyzed differences and correlations between body and air temperatures.
- Utilized multimodel inference to assess thermoregulation effectiveness indices.
- Evaluated the influence of body size, habitat, insularity, altitude, climate, and season.
Main Results:
- A significant effect of seasonality was observed, with reduced thermoregulation effectiveness in summer.
- Altitude was a key factor, showing higher thermoregulation effort at elevations above 1000 m.
- Insularity and body size showed potential importance but lacked clear patterns.
- Climate and habitat type had minimal impact on thermoregulation effectiveness.
Conclusions:
- Seasonality and altitude are primary determinants of thermoregulation effectiveness in lacertid lizards.
- Thermoregulatory strategies vary significantly with environmental conditions, particularly elevation and time of year.
- Understanding these factors is vital for predicting ectotherm responses to climate change.
Related Concept Videos
02:26Ecological Disturbance
21.1K
An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.
21.1K
02:02Ecological Niches
26.6K
All organisms have a position within an ecosystem. The complete set of living and nonliving factors—including food resources, climate, and terrain—that define the position of a given organism are collectively referred to as the organism’s ecological niche.
26.6K
02:17Ecological Succession
21.5K
Ecological succession is influenced by the processes of facilitation, inhibition, and toleration. Facilitation occurs when early successional species create more favorable ecological conditions for subsequent species, such as enhanced nutrient, water, or light availability. In contrast, inhibition happens when early successional species create unfavorable ecological conditions for potential successive species, such as limiting resource availability. In some cases, later successional species...
21.5K
01:27Thermal expansion and Thermal stress: Problem Solving
2.2K
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55...
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55...
2.2K
01:19Thermal Strain
2.9K
Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...
2.9K
01:22Thermal Expansion
5.7K
The expansion of alcohol in a thermometer is one of many commonly encountered examples of thermal expansion, which is the change in size or volume of a given system as its temperature changes. The most visible example is the expansion of hot air. When air is heated, it expands and becomes less dense than the surrounding air, which then exerts an upward force on the hot air to, for example, make steam and smoke rise, and hot air balloons float. The same behavior happens in all liquids and gases,...
5.7K