HOME >> BIOLOGY >> NEWS
Global warming may cause songbirds to avoid certain foods

KINGSTON, R.I. -- January 26, 2004 -- In yet another example of the far-reaching impact of global warming, a University of Rhode Island student found evidence that suggests some songbirds may avoid eating insects that consume leaves exposed to high levels of carbon dioxide.

URI senior Martina Mller of Kingston, working in cooperation with Associate Professor Scott McWilliams, Ph.D. candidate David Podlesak and colleagues at the University of Wisconsin, studied the food preferences exhibited by black-capped chickadees.

"When plants are grown in conditions of higher carbon dioxide, they produce increased levels of several secondary compounds -- tannins and phenolics -- that they use to defend against herbivory," said the 23-year-old wildlife conservation and biology major. "Those secondary compounds are absorbed by gypsy moth caterpillars that feed on the plant's leaves, which other researchers have found reduces the caterpillar's growth rates. We wanted to see if the chickadees can detect the secondary compounds in the caterpillars and if they have preferences for caterpillars that fed on different types of leaves."

Using chickadees captured in Kingston and acclimated for three days, Mller and McWilliams fed the birds a choice of caterpillars that were high in tannins or phenolics and other caterpillars low in those compounds.

"It was clear that the birds could tell the difference between the different caterpillars and they had strong preferences," Mller said. "They're intelligent birds with a keen capacity to learn."

While the birds showed a distinct preference for caterpillars low in tannins and phenolics, they also showed a preference for foods they had eaten previously. "Previous experience does affect their preferences," Mller said.

So what does all this mean? According to McWilliams, it could mean a great deal in a world that is growing warmer due to increasing levels of carbon dioxide in the atmosphere
'"/>

Contact: Todd McLeish
tmcleish@uri.edu
401-874-7892
University of Rhode Island
26-Jan-2004


Page: 1 2

Related biology news :

1. Global competition closes Texas sawmills/paper mills
2. Global warming and the onward march of the pine
3. Global warming to squeeze western mountains dry by 2050
4. Global wetlands surveyed from space
5. Fourteen Grand Challenges in Global Health announced
6. Global analysis finds a large portion of the earth is still wilderness
7. Global garden grows greener
8. Jane Goodall to receive 2003 Global Environmental Citizen Award
9. Global analysis finds nearly half the Earth is still wilderness
10. Global warming has uneven effect on coastal animals
11. Global aluminium waste headache solved

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/22/2016)... 22, 2016  The American College of Medical Genetics and ... Magazine as one of the fastest-growing trade shows during ... the Bellagio in Las Vegas . ... of growth in each of the following categories: net square ... number of attendees. The 2015 ACMG Annual Meeting was ranked ...
(Date:6/22/2016)... June 22, 2016   Acuant , ... verification solutions, has partnered with RightCrowd ® ... for Visitor Management, Self-Service Kiosks and Continuous ... that add functional enhancements to existing physical ... and venues with an automated ID verification ...
(Date:6/22/2016)... 2016 On Monday, the Department of Homeland ... share solutions for the Biometric Exit Program. The Request ... Protection (CBP), explains that CBP intends to add biometrics ... the United States , in order to deter ... Logo - http://photos.prnewswire.com/prnh/20160622/382209LOGO ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... ... 2016 , ... Researchers at the Universita Politecnica delle Marche in Ancona combed ... pleural mesothelioma. Their findings are the subject of a new article on the Surviving ... signposts in the blood, lung fluid or tissue of mesothelioma patients that can help ...
(Date:6/23/2016)... A person commits a crime, and the detective ... the criminal down. An outbreak of foodborne illness ... (FDA) uses DNA evidence to track down the bacteria that ... It,s not. The FDA has increasingly used a complex, cutting-edge ... illnesses. Put as simply as possible, whole genome sequencing is ...
(Date:6/23/2016)... SAN FRANCISCO , June 23, 2016   ... it has secured $1 million in debt financing from ... to ramp up automation and to advance its drug ... for its new facility. "SVB has been ... goes beyond the services a traditional bank would provide," ...
(Date:6/23/2016)... NEWPORT BEACH, Calif. , June 23, 2016 /PRNewswire/ ... offering new biological discoveries to the medical community, has ... and co-founder Matthew Nunez . "We ... provide us with the capital we need to meet ... funding will essentially provide us the runway to complete ...
Breaking Biology Technology:
Cached News: