Mercyhurst study probes impact of climate change on ectotherms

Cold blooded animals, or ectotherms, do not have an internal mechanism for regulating body temperature. Instead, they rely on solar energy captured by the environment.

The purpose of the Mercyhurst study, a collaboration of Michael Elnitsky, Ph.D., assistant professor of biology; and students Drew Spacht and Seth Pezar, is to assess the current and future impacts of climate change on the overwintering energetics and microenvironmental conditions of the goldenrod gall fly (Eurosta solidaginis). Larvae of the goldenrod gall fly have long served as model organisms for studying the strategies used by freeze-tolerant animals for winter survival.

“We used historical temperature data to estimate the overwintering (November through March) energy use of larval gall flies,” Elnitsky said. “Based upon the relationship between metabolic rate and temperature, the estimated energy utilization during winter has increased by more than 30 percent over the last 50 years.”

Further, with continued climate change, each additional 1̊-degree C rise in temperature during winter is projected to increase energy use by 12 percent. The consequence of this is that the amount of energy remaining at winter’s end directly determines how many offspring the goldenrod gall fly can produce.

“Unlike some other insects that are benefitting from a changing climate, goldenrod gall fly populations would be predicted to decline,” Elnitsky said.

The research team has begun similar assessments of the impacts of a changing winter climate for other arthropods, such as deer ticks (Ixodes scapularis) that transmit Lyme disease bacteria and the hemlock woolly adelgid (Adelges tsugae), an invasive insect destroying hemlock forests throughout the eastern U.S.

The Mercyhurst group presented their research at the annual meeting of the Entomological Society of America (ESA) in Knoxville, Tenn., last month. Spacht of Erie and Pezar of Madison, Ohio, were awarded the President’s Prize in the Physiology, Biochemistry and Toxicology section for their poster presentation. The President's Prize is the award given to the top undergraduate presentation in each section at the conference, which was attended by more than 4,000 scholars.

Also at the conference, Chris Strohm, a 2011 Mercyhurst biology graduate and currently a graduate student in entomology at the University of Kentucky, was awarded second place among graduate students in the Systematics, Evolution and Biodiversity section.

Media Contact

Debbie Morton EurekAlert!

More Information:

http://www.mercyhurst.edu

All latest news from the category: Life Sciences and Chemistry

Articles and reports from the Life Sciences and chemistry area deal with applied and basic research into modern biology, chemistry and human medicine.

Valuable information can be found on a range of life sciences fields including bacteriology, biochemistry, bionics, bioinformatics, biophysics, biotechnology, genetics, geobotany, human biology, marine biology, microbiology, molecular biology, cellular biology, zoology, bioinorganic chemistry, microchemistry and environmental chemistry.

Back to home

Comments (0)

Write a comment

Newest articles

Lighting up the future

New multidisciplinary research from the University of St Andrews could lead to more efficient televisions, computer screens and lighting. Researchers at the Organic Semiconductor Centre in the School of Physics and…

Researchers crack sugarcane’s complex genetic code

Sweet success: Scientists created a highly accurate reference genome for one of the most important modern crops and found a rare example of how genes confer disease resistance in plants….

Evolution of the most powerful ocean current on Earth

The Antarctic Circumpolar Current plays an important part in global overturning circulation, the exchange of heat and CO2 between the ocean and atmosphere, and the stability of Antarctica’s ice sheets….

Partners & Sponsors