Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Lizard activity levels can help scientists predict environmental change

01.04.2015

Research study provides new tools to assess warming temperatures

Spring is here and ectotherms, or animals dependent on external sources to raise their body temperature, are becoming more active. Recent studies have shown that as the average global temperature increases, some lizards may spend more time in the shade and less time eating and reproducing, which could endanger many species. Now, a detailed field study of the Puerto Rican crested anole by a University of Missouri researcher shows that lizards are active over a broader range of temperatures than scientists previously thought--but when temperatures are either too hot or too cold, critical activity levels slow, limiting the abilities of species to cope with climate variability.


A new Mizzou study reveals the crested anole is active over a broader range of temperatures than scientists had previously observed.

Credit: Manuel Leal

Like other cold-blooded animals, lizards have preferred body temperatures at which they hunt, eat, move quickly and reproduce. The active range for Puerto Rican crested anole is between 81 and 84 degrees Fahrenheit (27-29 degrees Celsius). Scientists previously projected that the lizards would no longer be active at hotter or cooler temperatures. The MU study shows a different perspective.

"We found that lizards were most active between the temperatures previously reported; however, above and below that range, lizards were still active," said Manuel Leal, associate professor of biological sciences in the College of Arts and Science at MU. "Although climate change is still a major problem for lizards, our research indicates that their activity levels are less constrained by temperature than previously thought."

In the study, Leal and Alex Gunderson, a postdoctoral fellow at the University of California-Berkeley, conducted behavioral observations and collected temperature data on hundreds of crested anoles in their native tropical habitat in Puerto Rico. They recorded the lizards' movements and behaviors over 15-minute intervals and measured the lizards' body temperatures.

"The findings suggest that scientists need to rethink how to model the activity of ectotherms and how temperature rise due to climate change may affect behavior," Leal said. "Instead of treating activity as an on- or off-switch, we need to start thinking about activity as more of a dimmer switch, where behaviors are being dialed up and dialed down."

The new modeling techniques presented in the study should provide scientists with the tools they need to create more targeted ways of determining the effects of climate variability on lizards' activities, such as eating and reproducing, Leal said.

###

The study, "Patterns of Thermal Constraint on Ectotherm Activity," appears in the March 11 online issue of the journal American Naturalist.

Editor's Note: For more on the story, please see: http://biology.missouri.edu/news/warming-temperatures-slow-but-dont-stop-lizards/

Media Contact

Jeff Sossamon
sossamonj@missouri.edu
573-882-3346

 @mizzounews

http://www.missouri.edu 

Jeff Sossamon | EurekAlert!

More articles from Life Sciences:

nachricht Scientists uncover the role of a protein in production & survival of myelin-forming cells
19.07.2018 | Advanced Science Research Center, GC/CUNY

nachricht NYSCF researchers develop novel bioengineering technique for personalized bone grafts
18.07.2018 | New York Stem Cell Foundation

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Future electronic components to be printed like newspapers

A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.

The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

A smart safe rechargeable zinc ion battery based on sol-gel transition electrolytes

20.07.2018 | Power and Electrical Engineering

Reversing cause and effect is no trouble for quantum computers

20.07.2018 | Information Technology

Princeton-UPenn research team finds physics treasure hidden in a wallpaper pattern

20.07.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>