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Tag: "fragmentation" at biology news

Critical role in programmed cell death identified

...nd to become smaller or fragment, but whether this fragmentation is a requirement for cell death or a byproduct has...t and her colleagues determined that mitochondrial fragmentation is required for cells to die and that the process that commits cells to the point of no return happe...

Low oxygen likely made Great Dying worse, greatly delayed recovery

...cross from one valley to the next. That population fragmentation likely increased the extinction rate and slowed recovery following the mass extinction, Huey said. "Biologists have previously thought about the physiological consequences of low oxygen levels during the late Permian period, but not about these biog...

Scientists reveal the shape of a protein that helps retroviruses break into cells

...cross from one valley to the next. That population fragmentation likely increased the extinction rate and slowed recovery following the mass extinction, Huey said. "Biologists have previously thought about the physiological consequences of low oxygen levels during the late Permian period, but not about these biog...

Mayan stingless bee keeping: Going, going, gone?

...ve bees may simply starve as deforestation, forest fragmentation and hurricanes reduce the availability of the floral resources they need. Finally, most of the bee keepers on the Yucatan are old men living in rural areas where no one inherits their knowledge of the fine points of meliponiculture, specifically, ho...

Bird song changes sound alarm over habitat fragmentation

...udy to analyse the role played by habitat loss and fragmentation on song-matching. Ecologists recorded and analyse...e an early warning system detecting the effects of fragmentation over relatively short times and before other indicators - such as genetic markers - show any change,...

Pregnancy drugs can affect grandkids

...udy to analyse the role played by habitat loss and fragmentation on song-matching. Ecologists recorded and analyse...e an early warning system detecting the effects of fragmentation over relatively short times and before other indicators - such as genetic markers - show any change,...

Study: Competition for sex is a 'jungle out there'

...n limitation. But it's not the only one. Habitat fragmentation is a proven cause of pollen limitation, as well as development. "These findings have global implications given the importance of biodiversity hotspots for medicine, food, nutrient cycling, and alternative resources for pollinators of domesticated cr...

Fragmentation rapidly erodes Amazonian biodiversity

...rnational research team has discovered that forest fragmentation poses an even greater threat to Amazonian biodiver...ersity of rainforest animals.? To understand how fragmentation is affecting the trees, the team studied 22 different characteristics of the increasing and declinin...

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...

The subtleties of tropical forest demise

...e two or more simultaneous threats—such as habitat fragmentation and wildfires, or logging and over hunting—dramatically 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...

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...ression 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...

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 s...

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