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Tag: "extinction" at biology news

Activation of a protein solidifies fear memory in the brain

... other memory processes after retrieval, including extinction of fear memory, further showing that our findings are specific for a reconsolidation process." She said enhancement of reconsolidation may contribute to the development of maladaptive memories in psychiatric disorders such as post-traumatic stress d...

Genetic study shows humans have pushed orangutans to the brink of extinction

...e genetic study shows that there is a high risk of extinction of the orangutan in Sabah in the near future if this decline goes on unabated," says Marc Ancrenaz, who also participated in the study. "The major threat to the long-term survival of orangutans in Sabah is linked with oil palm plantation development ...

Pitt professor's theory of evolution gets boost from cell research

...can't do a quick fix on the environment to prevent extinction because the cause of the mutation occurred some time in the past, and you don't know what the cause of the stress was at that time," Schwartz said. "This new understanding of how organisms change provides us with an opportunity to forestall the dama...

Why the Amazon rainforest is so rich in species

.... Species split at very different rates, and their extinction or transformation is mostly determined by the ecology and biology of each species. We want to discover more about why some species survive and multiply, while others remain static or become extinct." Around 40% of the world's species can be found in...

Pretreating rogue cancer cells with aspirin cripples their resistance to targeted therapy

... the world would help stave off an imminent global extinction crisis, according to new research published today ...rd), and the Sulu bleeding-heart (a dove). While extinction is a natural process, the authors note that current human-caused rates of species loss are 100-1,000...

New study pinpoints epicenters of Earth's imminent extinctions

... the world would help stave off an imminent global extinction crisis, according to new research published today ...rd), and the Sulu bleeding-heart (a dove). While extinction is a natural process, the authors note that current human-caused rates of species loss are 100-1,000...

Seal rookeries could provide a reliable food source for endangered California condors, study finds

...condors on the West Coast survived the Pleistocene extinction by switching to marine mammals--large carcasses of...g the eggs. That pushed them right to the brink of extinction until they hardly had any food left." By the 1980s, only two-dozen condors remained in the wild, pr...

Scientists sequence DNA of woolly mammoth

...ify the role environmental changes did play in the extinction of an entire species. Initial funding for this study was provided by McMaster University, The Natural Sciences and Engineering Research Council of Canada, and Penn State University. The researchers now are seeking funding for the completion of the ...

Adult stem cells aid recovery in animal model of cerebral palsy

...er rate of extinction. Speciation, adaptation, and extinction are all controlled by the interplay between genetic and environmental factors. Understanding the genetic changes that lead to the formation of new species is an important area of research in evolutionary biology. In a new study, Thomas Turner, Matth...

Islands in the Genome Promote Speciation

...er rate of extinction. Speciation, adaptation, and extinction are all controlled by the interplay between genetic and environmental factors. Understanding the genetic changes that lead to the formation of new species is an important area of research in evolutionary biology. In a new study, Thomas Turner, Matth...

Removing egg from nest may help save endangered whooping crane

...e same whether one egg or two is laid, the risk of extinction for the Wood Buffalo-Aransas whooping crane population is lowest when eggs are removed, says Boyce. He recognizes the need to minimize human influence in national parks, but says priority should be given to ensure persistence of threatened and endan...

Gene therapy may protect normal tissues during radiation retreatment for lung cancer

... been thought that these ecosystems somehow dodged extinction by recolonising from nearby habitats that escaped obliteration. But researchers at the National Oceanography Centre, Southampton (NOC) and the British Antarctic Survey (BAS) reveal a bleaker scenario. Dr Sven Thatje, an ecologist at NOC has been wor...

Seafloor creatures destroyed by ice action during ice ages

... been thought that these ecosystems somehow dodged extinction by recolonising from nearby habitats that escaped obliteration. But researchers at the National Oceanography Centre, Southampton (NOC) and the British Antarctic Survey (BAS) reveal a bleaker scenario. Dr Sven Thatje, an ecologist at NOC has been wor...

Scientists must offer solutions for conserving tropical forests in a rapidly changing world

...ust help to mitigate the number of species lost to extinction by enhancing the effectiveness of the network of protected areas. Other applied research will help to rehabilitate degraded lands and to improve agricultural yields and living standards. According to William F. Laurance, Wright's colleague at STRI a...

Study Holds Promise For New Way To Fight HIV

...antic antlers) lived from 400,000 years ago to its extinction 8000 years ago and would have towered over its descendant, reaching a shoulder height of around two metres with antlers spanning 3.5 metres (10 feet). Deer from around the world (including the southeast Asian axis deer, the hog deer and fallow deer)...

Extinct giant deer's descendant found in UK

...antic antlers) lived from 400,000 years ago to its extinction 8000 years ago and would have towered over its descendant, reaching a shoulder height of around two metres with antlers spanning 3.5 metres (10 feet). Deer from around the world (including the southeast Asian axis deer, the hog deer and fallow deer)...

Seeing the forest and the trees

... diversity that resulted from a range of different extinction scenarios: those governed by biological characteri...found in tropical forests. By simulating different extinction scenarios and analyzing the resulting mix of tree species, the team was able to determine how much c...

Study shows big game hunters, not climate change, killed off sloths

...ot the last ice age are the likely culprits in the extinction of giant ground sloths and other North American gr...ek. "If climate were the major factor driving the extinction of ground sloths, you would expect the extinctions to occur at about the same time on both the islan...

Costly breeding programs for endangered species pay off

...red populations went extinct, compared to just one extinction for the MAI lines. "Apparently, the stressful environment served to select only the most fit lines while the more benign environment allowed low-fitness lines to persist in captivity," said Meffert. Though the findings clearly support the case for ...

India's smoking gun: Dino-killing eruptions

...sm and impact," she said. And that is the K-T mass extinction that ended the reign of the dinosaurs. "Our view i...pact had not occurred." Wiped out in the K-T mass extinction were 80-90% of marine species and about 85% of land species. All land animals larger than 25 kg (55 ...

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