Tag: "fragmentation" at biology news
Satellite tracking reveals threats to Borneo pygmy elephants
...the island of Borneo, are under threat from forest fragmentation
and loss of habitat. Borneo pygmy elephants depend for their survival on forests situated on flat, low lands and in river valleys, the study found. Unfortunately, it is also the type of terrain preferred for commercial plantations. Over the past f...
JCI table of contents -- July 26, 2007
...essively expanded in size and was accompanied by a fragmentation
of surrounding capillaries, resulting in hemorrhag...pinal cord injury essentially eliminated capillary fragmentation
and hemorrhage, reduced spinal cord tissue damage 3-fold, and resulted in marked improvement in mobi...
Smithsonian Fragmentation Project threatened by Amazon Colonization Plan
...kes are very high, said Laurance. Its not just the fragmentation
project thats threatened but also other scientific...round the world, working to understand how habitat fragmentation
affects the complex Amazonian rainforest. Located two hours north of Manaus, Brazil, the projects st...
Satellite images reveal link between urban growth and changing rainfall patterns
... revealed that both reserves experienced increased fragmentation
of mangrove forest habitat with increased aquaculture. Contrary to expectations, the scientists found that aquaculture developed at a faster rate at the Xuan Thuy treaty site than at its non-Ramsar neighbor. These findings mirrored statements by lo...
Rove beetles act as warning signs for clear-cutting consequences
...ies, such as the rove beetle, become threatened by fragmentation
and loss of habitat. This study is significant because it indicates a new forest will not hold the same biota as an old forest, so we must ensure that forest managers conserve adequate patches of old forests or make adequate long term plans for their...
Researchers find 24 species believed new to science in Suriname rainforest
...us on protecting freshwater streams and preventing fragmentation
of the natural habitat from unchecked or poorly planned development. The Guayana Shield region contains the largest undisturbed tropical rainforest on the planet, a northern Amazon tract three times larger than the U.S. state of Texas (twice the si...
Oregon researchers involved in new Clovis-age impact theory
...es, heat, flooding, wildfires, and a reduction and fragmentation
of the human population." The carbon-rich layer contains metallic microspherules, iridium, carbon spherules, fullerenes, charcoal and soot. Some of those ingredients were found worldwide in soils dating to the K-T Boundary of 65 million years ago. ...
Drought sensitivity shapes species distribution patterns in tropical forests
...ability caused by global climate change and forest fragmentation
are likely to alter tropical species distribution, community composition and diversity."...
First research to show that diabetes damages DNA in men's sperm and may affect fertility
...he nuclei of the sperm cells had greater levels of fragmentation
in diabetic men (52%, versus 32% in non-diabetic m...udy identifies important evidence of increased DNA fragmentation
of nuclear DNA and mitochondrial DNA deletions in sperm from diabetic men. These findings cause conc...
Elephant highways of death
...pread of poaching and control settlement and range fragmentation
associated with road development. The authors further warn that the illegal ivory trade must be brought under control in elephant range-states, transit countries and destination nations. Lastly, they conclude that private logging and mining compani...
Smithsonian-led Amazon research team wins scientific prize
...describes the remarkably potent impacts of habitat fragmentation
on the Amazon ecosystem. The Amazon contains the...ents 26 years ago. "We have discovered that forest fragmentation
poses an even greater and more complex threat to Amazonian biodiversity than was previously thought....
Brown team finds crucial protein role in deadly prion spread
...ention. If a drug could be made that inhibits this fragmentation
process, it could substantially slow the spread of...gression of these diseases as well. "The protein fragmentation
we studied has a big impact on how fast prion diseases spread and may also play a role in the accumu...
Large size crucial for Amazon forest reserves
...t and longest running experimental study of forest fragmentation
the Biological Dynamics of Forest Fragments Proje...n processes permit prediction of effects of future fragmentation
on bird communities in these Amazon landscapes. Area is important because the forest is spatially ...
Africa's least-known carnivore in Tanzania
...d Dr. De Luca of WCS' Tanzania Program. "Given the fragmentation
and small sizes of the forest patches in which they live, full protection of nearby forests would improve conditions for conserving this species." In 2004, WCS conservationists working in the Southern Highlands of Tanzania discovered a new species ...
Extreme life, marine style highlights 2006 ocean census
...ntinuously, revealing the extension and shrinking, fragmentation
and merging of the island-sized swarms as a person might watch schools of minnows swimming in a brook beneath a bridge. Deepest Sampling 5 km below the surface in the Sargasso Sea, deploying a unique trawl configuration that filtered large volume...
Freshwater snails are surprisingly fast-moving invaders
... invading all Martinican rivers now." Landscape fragmentation
is a common feature to many invasions, and even apparently continuous terrestrial landscapes, when examined at a certain scale, end up looking heterogeneous and patchy. The classical deterministic diffusion paradigm fails to incorporate this feature ...
Fragmentation rapidly erodes Amazonian biodiversity
...rnational research team has discovered that forest fragmentation
poses an even greater threat to Amazonian biodiver...versity of rainforest animals. To understand how fragmentation
is affecting the trees, the team studied 22 different characteristics of the increasing and declinin...
Have traits, will travel: Some butterflies travel farther, reproduce faster
...nted environment. Scientists want to know how this fragmentation
influences a species' evolution. "We may be selecting for genes that enhance the dispersal or migratory capability of animals when we fragment the landscape," Fescemyer said. The animals best able to migrate are more likely to survive and reproduce....
Rising temperatures will lead to loss of trout habitat in the southern Appalachians
...ces. Under both temperature change scenarios, this fragmentation
would increase. "As the remaining habitat for trout becomes more fragmented, only small refuges in headwater streams at the highest levels will remain," says Flebbe. "Small populations in isolated patches can be easily lost, and in a warmer climate, ...
The subtleties of tropical forest demise
...re two or more simultaneous threatssuch as habitat fragmentation
and wildfires, or logging and over huntingdramatically increase local extinctions of tropical species. "Many of the emerging threats to tropical forests become apparent only after exhaustive, long-term field studies," said Peres. "That's one of the r...
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