Fragmentation Of Tropical Forests Can Create "Genetic Bottleneck," According To New University Of Georgia Study

ATHENS, Ga.--Tropical forests have been disappearing at alarming rates for the past three decades. Farmers, ranchers and timber industries have cut millions of acres, and only in the past few years has the ecosystem damage become clear.

A new study by botanists at the University of Georgia now shows for the first time that trees left standing in pastures can actually dominate the reproduction in nearby remnant forests, creating a "genetic bottleneck." The research indicates that the survival of tropical forests could be far more complex than was known before and that new approaches to conservation strategies may be needed.

"The key is to understand how much genetic movement there is between fragments of forest," said Dr. James Hamrick. "When we lose fragments of forest, we lose genetic diversity. Gene exchange between fragments helps to maintain this diversity."

The study, by Hamrick and his graduate student Preston Aldrich, was published today in the journal Science.

Genetic diversity is vital in both plant and animal communities. Farmers have, for hundreds of years, bred crop plants and farm animals to maintain a healthy diversity of what were, before the 20th century, called traits. Now, with advanced techniques to determine the exact genetic makeup of individuals, scientists understand considerably more about how genes drift through populations.

Aldrich and Hamrick studied a tree species called Symphonia globulifera in a little-examined premontane rain forest area in southern Costa Rica. S. globulifera is a shade-tolerant canopy tree with bright red flowers that are pollinated primarily by hummingbirds. Bats disperse the seeds by eating fruits and then passing seeds on through guano at their resting sites. Like many areas in the tropics, the study area consisted of an area of fragmented forest with a number of large nearby members of the species standing alone in open pasture land. There were neit

Contact: Phil Williams
University of Georgia

Page: 1 2 3 4

Related biology news :

1. Fragmentation may be linked to local amphibian extinctions
2. Fragmentation can make seedlings wimpy
3. Fragmentation may limit songbird sex lives
4. Fragmentation linked to stress in birds
5. Fewer Songbirds May Be Result Of Forest Fragmentation Across The American South, New Study Suggests
6. Tropical legume could be alternative hay/forage crop for Texas
7. Tropical deforestation and global warming
8. Arthropods of Tropical Forests
9. Tropical Science for the 21st Century
10. A Magic Web: The Tropical Forest of Barro Colorado
11. Ira Rubinoff honored by the Association for Tropical Biology

Post Your Comments:

(Date:3/27/2017)... CENTRE, N.Y. , March 27, 2017 /PRNewswire-USNewswire/ ... Healthcare Information and Management Systems Society (HIMSS) Analytics ... Outpatient EMR Adoption Model sm . In addition, ... 12% of U.S. hospitals using an electronic medical ... CHS for its high level of EMR usage ...
(Date:3/24/2017)... Mar 24, 2017 Research and Markets has ... Market Analysis & Trends - Industry Forecast to 2025" report ... ... at a CAGR of around 15.1% over the next decade to ... report analyzes the market estimates and forecasts for all the given ...
(Date:3/23/2017)... -- Research and Markets has announced the addition of ... Industry Forecast to 2025" report to their offering. ... The Global Vehicle Anti-Theft ... 8.8% over the next decade to reach approximately $14.21 billion by ... and forecasts for all the given segments on global as well ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... The Blavatnik Family ... and six Finalists of the 2017 Blavatnik Regional Awards for Young Scientists. ... and administered by the New York Academy of Sciences to honor the excellence ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... analysis platform specifically designed for life science researchers to analyze and interpret ... Rosalind Franklin, who made a major contribution to the discovery of the ...
(Date:10/11/2017)... ... October 11, 2017 , ... Proscia ... be hosting a Webinar titled, “Pathology is going digital. Is your lab ready?” ... pathology adoption best practices and how Proscia improves lab economics and realizes an ...
(Date:10/11/2017)... ... October 11, 2017 , ... Singh Biotechnology ... drug designation to SBT-100, its novel anti-STAT3 (Signal Transducer and Activator of Transcription ... is able to cross the cell membrane and bind intracellular STAT3 and inhibit ...
Breaking Biology Technology:
Cached News: