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Tag: "zone" at biology news

Essential mangrove forest threatened by cryptic ecological degradation

...time such practices drastically affect the coastal zone by introducing an excess of fresh water. The consequences range from adverse shifts in the composition of mangrove tree species to disrupted ethnobiological relationships, lagoon fisheries, and many additional functions provided by mangroves. The au...

Dead zone area in Gulf could be increasing, researchers say

...ate University and NASA recently surveyed the dead zone in the northern Gulf of Mexico and their findings ...ected this time of year. That could mean the dead zone area could be more severe in 2005 and perhaps cover an even larger area than in previous years, says...

Plant Sacrifices Cells to Fight Invaders

...death (PCD). Plants use PCD to create a protective zone of dead cells around the infection site to prevent the invading pathogen from spreading. But how the plants keep from killing themselves after they turn on the cell-suicide process was a mystery. Now, in the May 20 issue of the journal Cell, Yale Un...

Oceans more vulnerable to agricultural runoff than previously thought, study finds

...ey multiply. The result is an oxygen-depleted dead zone at the bottom of the sea where few creatures can survive. A massive dead zone appears every summer in the Gulf of Mexico off the coast of Louisiana and Texas. Scientists believe ...

Brain May Be Less Plastic Than Hoped

...y made baseline measurements of the cortical quiet zone two to three hours after the laser surgery and compared them to new readings taken every few weeks for up to seven and a half months. “If the visual cortex of the monkeys did reorganize, it would happen as they were behaving normally in their cages ...

Rabies spread speeds up

...mal was detected - 11 kilometers beyond the buffer zone - in northeastern Ohio. By modelling the spread of past outbreaks, the authors had already shown that local transmission was significantly reduced when townships were separated by geographical barriers. The authors incorporated the likely effect of O...

Researchers discover stem cell 'guide' that may be key for targeting neural stem cell treatments

...old and dying ones. One area is the subventricular zone of the lateral ventricles, which are fluid-filled ...orn from neural stem cells from the subventricular zone in the brain's core through mature tissue to reach the olfactory bulb, the "smell" part of the brain...

New method shows it is possible to grow bone for grafts within a patient's body

...atural wound-healing response and create a special zone on the surface of a healthy bone in hopes that the body would respond by filling the space with new bone. The approach lived up to their highest expectations. Working with mature rabbits, a species with bones that are very similar to those of humans,...

Woods Hole Research Center plans controlled burn in Amazon rainforest

...eriment, along with concurrent studies of riparian zone recuperation, soil management, and water quality, will help this and other companies improve the ecological management of their properties. Grupo Maggi provides no funding for this research. ...

New technique rapidly detects illness-causing bacteria

... binds to the S. pyogenes rRNA and anchors it to a zone on a strip of membrane, while the reporter probe, ...o the rRNA molecule, as the material collects on a zone on the membrane, it turns the strip visibly red, much like with a pregnancy test. The entire proces...

The synapse is a shotgun

... which all the vesicles are released at the active zone -- that's taken for granted now." The function of shotgun neurotransmitter release is unknown, said Sejnowski. "There's just nothing solid on our radar screen right now," he said. "There is speculation that ectopic release represents some sort of sp...

Envisat and ERS-2 reveal hidden side of Hurricane Rita

...basically a large, powerful storm centred around a zone of extreme low pressure. Strong low-level surface winds and bands of intense precipitation combine strong updrafts and outflows of moist air at higher altitudes, with energy released as rainy thunderstorms. Envisat carries both optical and radar in...

How cell suicide protects plants from infection

...o protect themselves from viruses, plants create a zone of dead cells around an infection site that prevents the infection from spreading. Savithramma Dinesh-Kumar, associate professor of Molecular, Cellular and Developmental Biology at Yale and his colleagues discovered how the plants keep from killing t...

New understanding of jet lag

...elers could adjust much more quickly to rapid time zone changes. Most people require about two-and-a-half days to adjust to a six-hour flight from Europe to the United States, and even longer after an eastbound trans-Atlantic flight. The study also has implications for ways to treat shift workers - health...

Picky female frogs drive evolution of new species in less than 8,000 years

... As a comparison, they looked at a second contact zone on the border between north and south, where frogs were not isolated from either lineage. "Reinforcement does not appear to occur at the more 'classic' contact between northern and southern lineages, and we speculate that this may be due to gene flo...

Emerald Spectre haunts Ontario's ash forests

...he current extent of the infestation. The infected zone now covers all of Ontario's Essex County and extends to include the entire lower peninsula in Michigan and much of northern Indiana and Ohio. "It's not just an Ontario or Canadian problem. Even if we're able to contain it here, it could come across...

Oldest dated evidence of cattle in southern Africa found

... situated near the southern edge of the Tsetse fly zone and the new dates of about 2000 years ago appear to date the initial penetration of livestock through this zone. ...

Chernobyl: The true scale of the accident

...ultural and industrial activities in the exclusion zone permitted many plant and animal populations to expand and created, paradoxically, "a unique sanctuary for biodiversity." Does dismantlement of the Shelter and management of radioactive waste pose further environmental problems? The protective shelt...

Underlying cause of massive pinyon pine die-off revealed

...lished a study site in the pinyon-juniper woodland zone at LANL. Roughly every two weeks, Breshears and his colleagues measured soil moisture on the 100-by-150 meter plot (about three times the size of a football field). Temperature and precipitation data were recorded at a nearby site. In 1992, the team ...

Envisat radar surveillance protects endangered prehistoric fish

A satellite surveillance zone within the southern Indian Ocean is helping protec...ve numbers. France maintains an economic exclusion zone (EEZ) extending 360 kilometres offshore from Kerguelen Island, along with its nearby Crozet and St-P...

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