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Tag: "desert" at biology news

Sunflower speciation highlights roles for transposable elements in evolution

...treme environment--two of the species are found in desert environments, while the third is adapted to salt marshes. Both hybridization and abiotic stress have been implicated as natural agents of activation and proliferation of transposable elements. ...

Study finds the air rich with bacteria

...wn dust and biomass from Africa's expanding Sahara desert are reaching North America in significant quantities. Recent research links this dust to an increase in asthma cases in the Caribbean. "We need to determine what's in the air, so we can determine how climate change affects microbial diversity," s...

Biofuel cells without the bio cells

... a little like that slogan for a hyper-electrified desert gambling town: What happens in the cellular environs stays there. Now, scientists for the first time have observed this electricity-shuttling process taking place sans cells, in purified proteins removed from the outer membrane of the versatile, me...

Math model predicts cancer behavior

...r. Under harsh environmental conditions ?imagine a desert ?the most aggressive cell types dominate and the tumor shape has fingering, invasive projections. By changing a single condition ?oxygen concentration ?the investigators can modulate the tumor's degree of invasiveness, Quaranta said. The findings...

Bats prey on nocturnally migrating songbirds

...hazard adds to the numerous obstacles that sea and desert crossings already represent for fragile migratory passerines. Actually, the newly uncovered danger comes from the deep black sky, in the form of a 45 cm wing-spanned aerial-hawking mammal, equipped with sharp canines and an efficient radar system whi...

The desert is dying

...ve found that trees, which are a main resource for desert people and their flocks, are in significant declin... sustainable indigenous resource management, which desert people have developed through millennia, is changing. Desertification has been recurrently discuss...

How trees manage water in arid environments

...g to the water that so many people depend on. In a desert region, such forests are found only at the tops of mountains because only there does precipitation exceed evaporation enough for forest vegetation to survive. Understanding surface-atmosphere interactions is important to understanding a range of w...

Agent slows aging in mice

...ng agents. But a synthetic derivative of a pungent desert shrub is now a front- runner in ongoing animal exp... from creosote bushes. These common North American desert shrubs have been traditionally used by Native Americans as healing remedies. The preliminary re...

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