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:2/5/2015)... PARK, North Carolina , 5. Februar ... 35. Jahr als spezialisiertes Logistikunternehmen und hat ... als einzige klinische Logistikfirma (Clinical Logistics Organization ... Kernbotschaft der neuen Kampagne lautet First ... Lieferungen. Foto: http://photos.prnewswire.com/prnh/20150205/173753 ...
(Date:2/5/2015)... , January 28, 2015 New ... Size And Segment Forecasts To 2020 has Been Added ... camera market is expected to reach USD 5.10 billion ... View Research, Inc. IR cameras help identify the site ... expected to witness surging demand in medical imaging applications. ...
(Date:1/22/2015)... and Markets ( http://www.researchandmarkets.com/research/4trb7t/biometrics_a ) has announced the ... report to their offering. , The ... individual is who she/he is claiming to be, and for ... unique physical characteristics, such as fingerprint, hand or palm print, ...
Breaking Biology News(10 mins):Marken startet Kampagne mit Patienten im Mittelpunkt 2Marken startet Kampagne mit Patienten im Mittelpunkt 3IR Camera Market Worth $5.10 Billion By 2020: Grand View Research, Inc. 2IR Camera Market Worth $5.10 Billion By 2020: Grand View Research, Inc. 3Biometrics - A Global Market Overview 2Biometrics - A Global Market Overview 3
(Date:2/27/2015)... 27, 2015 Cytokinetics, Incorporated (Nasdaq: CYTK) ... 28 with patients and health care advocates in the ... Disease Day®. Rare Disease Day is dedicated to ... to the special challenges faced by patients with rare ... is proud to stand alongside patients and caregivers representing ...
(Date:2/26/2015)... MOUNTAIN VIEW, Calif. , Feb. 26, 2015 /PRNewswire/ ... appointment of Kate Black as Privacy Officer ... international, federal, and state privacy laws as well as ... and regulatory team, she will be responsible for reviewing, ... for customers in the U.S. and abroad. She joined ...
(Date:2/26/2015)... Fla. , Feb. 26, 2015 DuPont ... growth priorities driven by key research advancements and product ... at today,s Bank of America Merrill Lynch 2015 Global ... the challenge of building grain supplies the last two ... continue at the pace of the last decade, when ...
(Date:2/26/2015)... BioEnterprise today announced that Northeast Ohio ... in growth funding during the past 13 years.  Funding ... – including the Ohio Third Frontier - and federal ... raised in the past five years. ... BioEnterprise Midwest Healthcare Growth Capital  Report.   ...
Breaking Biology Technology:Cytokinetics Joins Global Movement to Raise Awareness for Rare Diseases 2Cytokinetics Joins Global Movement to Raise Awareness for Rare Diseases 3Cytokinetics Joins Global Movement to Raise Awareness for Rare Diseases 4Cytokinetics Joins Global Movement to Raise Awareness for Rare Diseases 5Cytokinetics Joins Global Movement to Raise Awareness for Rare Diseases 623andMe Appoints Kate Black as Privacy Officer and Corporate Counsel 2DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 2DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 3DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 4DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 5More Than $2 Billion Invested in Northeast Ohio Bioscience Start-Up Companies Since 2002 2More Than $2 Billion Invested in Northeast Ohio Bioscience Start-Up Companies Since 2002 3More Than $2 Billion Invested in Northeast Ohio Bioscience Start-Up Companies Since 2002 4
Cached News: