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:
(Date:11/6/2014)... is an asset for a predator. Except when that predator ... tiger beetle, relative to its size, is the fastest creature ... body lengths per second (at about five miles per hour). ... take the sprinting gold from the tiger beetle, a person ... The tiger beetle has a problem. At peak speeds, everything ...
(Date:11/5/2014)... Janeiro, Brazil -Individuals show great diversity in their ability ... and females greatly differ in their perceptual evaluation of ... smell tests. , Sex differences in olfactory ... and may be connected to one,s perception of smell, ... Thus, women,s olfactory superiority has been suggested to be ...
(Date:11/4/2014)... CORAL GABLES, Fla. (November 4, 2014) — Think about ... and ask: How do neighboring cells know that they ... cell and how do these tissues find the correct ... (UM) are answering these crucial questions. , In a ... tissues use to communicate with their surrounding neighbors, at ...
Breaking Biology News(10 mins):The tiger beetle: Too fast to see 2The female nose always knows: Do women have more olfactory neurons? 2The inside story: How the brain and skull stay together 2
(Date:11/21/2014)... Why did Stephen Hawking become so famous? ... recognizable? Why have they become icons to rival film ... Ratcliffe seeks out the answers to those questions, and ... with science. In " Stephen Hawking Smoked My Socks ... Ratcliffe puts it plainly: , “It is profoundly ...
(Date:11/21/2014)... Nov. 20, 2014 /CNW/ - Aequus Pharmaceuticals Inc. ... that it has closed a brokered private placement ... approximately C$3.7 million.  Cormark Securities Inc. and Clarus ... Brokered Offering for a syndicate of agents that ... Corp. (collectively the "Agents"). Concurrently with the Brokered ...
(Date:11/18/2014)... 17, 2014 RPS Diagnostics (RPS®) ... – today announces its third annual partnership of ... Get Smart About Antibiotics Week from November 17-23. ... national campaign designed to highlight the coordinated efforts ... non-profit and for-profit partners to provide education about ...
(Date:11/18/2014)... (PRWEB) November 18, 2014 Alanda ... and Transparency Reporting solutions, announced today that a ... using its Consummate Provider™ solution in both the ... a Global, SaaS based, Data Quality remediation portal, ... their third party Providers improve their ability to ...
Breaking Biology Technology:“Stephen Hawking Smoked My Socks” Sparks Controversy in Science World 2“Stephen Hawking Smoked My Socks” Sparks Controversy in Science World 3“Stephen Hawking Smoked My Socks” Sparks Controversy in Science World 4Aequus Pharmaceuticals closes $4.2 million private placement financing 2Aequus Pharmaceuticals closes $4.2 million private placement financing 3RPS Again Partners with the CDC in Support of the 2014 Get Smart About Antibiotics Week 2RPS Again Partners with the CDC in Support of the 2014 Get Smart About Antibiotics Week 3Alanda Software Completes Successful Implementation of Global Data Quality & Vendor Management Solution for Top Tier Global Biopharmaceutical Company 2
Cached News: