HOME >> BIOLOGY >> NEWS
Duke Studies Show That Environmental Effects Of Dams Extend To Insect Life

BALTIMORE, Md. -- Studies of butterfly and ant life on Venezuelan islands newly created by the flooding of the world's second largest reservoir show how dramatically sudden isolation can change even tiny components of a once-integrated ecosystem.

By painstakingly investigating these small invertebrate species for three years, two researchers from Duke University's Nicholas School of the Environment found that inundation has served to exclude some common but highly specialized fruit-eating butterflies from the smallest surviving pieces of the former forest, while at the same time causing leaf cutter ant populations to explode there.

Their studies offer insights into the complex and often unexpected effects of ecological disturbances.

Ghazala Shahabuddin and Madhu Rao prepared reports on their work for presentation at the Ecological Society of America's 1998 Annual Meeting Aug. 3-6.

Their observations and experiments are a part of a larger forest fragmentation study designed by John Terborgh, a professor at the Nicholas School and the department of zoology at Duke. Terborgh, past recipient of a prestigious MacArthur fellowship and an authority on tropical ecosystems, proposed to use the mammoth Lake Guri dam project in east-central Venezuela to simulate what happens to forest habitats that get broken into "islands" by such land-bound activities as agricultural conversion into fields and pastures.

"Generally, it's been found that when chunks of land get separated, dramatic ecological changes take place in the fragments, generally leading to a lot of species extinction at some point," said Shahabuddin, who is one of Terborgh's doctoral students. "I decided to look at butterflies, because very few people look at such invertebrates in forest fragments," she added in an interview.

In 1995, Shahabuddin began to evaluate the ways in which approximately 40 different butterfly species that dine only on rot
'"/>

Contact: Monte Basgall
Monte@dukenews.duke.edu
919-681-8057
Duke University Medical Center
5-Aug-1998


Page: 1 2 3 4

Related biology news :

1. Monkey business: Studies show tiny callimicos have unusual characteristics
2. Studies show success of Mectizan partnerships
3. Studies offer new insight into HIV vaccine development
4. Studies suggest brain injury results from developmental exposure to alcohol, anesthesia, and lead
5. Studies show preventive value of food supplements
6. Studies probe rapid evolution of Chinese tallow trees
7. Studies of rare blood syndrome yield novel route to cancer
8. Studies dispute ultraviolet effect on amphibian population declines
9. Studies of spiders silk reveal unusual strength
10. Studies of genes in mice and common worm may accelerate research on blood diseases, cancers
11. Studies offer data on potential impact of Reminyl on caregiver burden in Alzheimers disease

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


(Date:4/26/2016)... , April 27, 2016 ... the  "Global Multi-modal Biometrics Market 2016-2020"  report to ... ) , The analysts forecast the ... CAGR of 15.49% during the period 2016-2020.  ... number of sectors such as the healthcare, BFSI, ...
(Date:4/13/2016)... , April 13, 2016  IMPOWER physicians supporting Medicaid ... setting a new clinical standard in telehealth thanks to ... leveraging the higi platform, IMPOWER patients can routinely track ... and body mass index, and, when they opt in, ... convenient visit to a local retail location at no ...
(Date:3/22/2016)... India , March 22, 2016 /PRNewswire/ ... market research report "Electronic Sensors Market for Consumer ... Proximity, & Others), Application (Communication & IT, ... Geography - Global Forecast to 2022", published ... industry is expected to reach USD 26.76 ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... TOKYO , June 24, 2016  Regular discussions on ... to take place between the two entities said Poloz. ... in Ottawa , he pointed to the ... and the federal government. ... Poloz said, "Both institutions have common economic goals, why not ...
(Date:6/23/2016)... WA (PRWEB) , ... June 23, 2016 , ... ... announces the release of its second eBook, “Clinical Trials Patient Recruitment and Retention ... recruitment and retention in this eBook by providing practical tips, tools, and strategies ...
(Date:6/23/2016)... SILVER SPRING, Md. , June 23, 2016 ... evidence collected from the crime scene to track the criminal ... sick, and the U.S. Food and Drug Administration (FDA) uses ... Sound far-fetched? It,s not. ... whole genome sequencing to support investigations of foodborne illnesses. Put ...
(Date:6/23/2016)... NEW YORK , June, 23, 2016  The ... students to envision new ways to harness living systems ... of Modern Art (MoMA) in New York ... more than 130 participating students, showcased projects at MoMA,s ... included Paola Antonelli , MoMA,s senior curator of ...
Breaking Biology Technology:
Cached News: