Τρίτη 7 Ιανουαρίου 2014

ScienceDaily: Top Environment News

ScienceDaily: Top Environment News


Worker wasps grow visual brains, queens stay in dark

Posted: 06 Jan 2014 01:01 PM PST

A queen in a paperwasp colony largely stays in the dark. The worker wasps, who fly outside to seek food and building materials, see much more of the world around them. A new study indicates that the brain regions involved in sensory perception also develop differently in these castes, according to the different behavioral reliance on the senses.

'Ardi' skull reveals links to human lineage

Posted: 06 Jan 2014 01:00 PM PST

One of the most hotly debated issues in current human origins research focuses on how the 4.4 million-year-old African species Ardipithecus ramidus is related to the human lineage. New research confirms "Ardi's" close evolutionary relationship to humans. Researchers turned to the base of a beautifully preserved partial cranium of Ardi, which reveals a pattern of similarity that links Ardi to Australopithecus and modern humans and but not to apes.

New fossils shed light on the origins of lions, tigers, and bears

Posted: 06 Jan 2014 01:00 PM PST

A new study discusses the origins of cats and dogs, as well as other carnivorous mammals like bears, seals, and weasels (taxonomically called "carnivoraformes"), and describes new specimens of one of the earliest of these primitive taxa.

To curb China's haze, air pollution, use water

Posted: 06 Jan 2014 10:32 AM PST

A new idea to cut back on air pollution: spray water into the atmosphere from sprinklers atop tall buildings and towers, similar to watering a garden. In an article published, a researcher suggests this course of action as a novel approach to help curb the severe air pollution and heavy haze.

Tiny acts of microbe justice help reveal how nature fights freeloaders

Posted: 06 Jan 2014 10:32 AM PST

Researchers have discovered that bacteria prevent layabouts from enjoying the fruit of others' hard work by keeping food generated by the community's productive members away from those microbes that attempt to live on others' leftovers. The process could have uses in agriculture, energy and medicine, as well as provide insight into how species protect themselves from the freeloaders of their kind.

China destroys ivory: Wildlife Conservation Society congratulates Chinese Government for sending strong anti-poaching message

Posted: 06 Jan 2014 10:27 AM PST

The Wildlife Conservation Society congratulates China's State Forestry Administration and the General Administration of Customs for destroying confiscated ivory – a major development in the effort to protect elephants from the ravages of ivory poaching.

Supervolcano triggers recreated in X-ray laboratory

Posted: 06 Jan 2014 06:44 AM PST

Scientists have reproduced the conditions inside the magma chamber of a supervolcano to understand what it takes to trigger its explosion. These rare events represent the biggest natural catastrophes on Earth except for the impact of giant meteorites. Using synchrotron X-rays, the scientists established that supervolcano eruptions may occur spontaneously, driven only by magma pressure without the need for an external trigger.

Mine landslide triggered earthquakes: Record-breaking slide would bury Central Park 66 feet deep

Posted: 06 Jan 2014 06:42 AM PST

Last year's gigantic landslide at a Utah copper mine probably was the biggest nonvolcanic slide in North America's modern history, and included two rock avalanches that happened 90 minutes apart and surprisingly triggered 16 small earthquakes, scientists discovered.

Frozen frogs: How amphibians survive the harsh Alaskan winters

Posted: 06 Jan 2014 06:41 AM PST

As winter approaches, many of us hunker down and virtually "hibernate" for the season. Classic hibernation in the wild conjures images of furry bears, but other animals are not so lucky to have immense fat stores or fur to protect them from the elements. Frogs that live at northern latitudes have neither of these, but must find ways to survive the harsh winter season. Their solution? Freezing … but not to death.

Researchers map out world's winegrape varieties

Posted: 06 Jan 2014 06:40 AM PST

Researchers have compiled statistics from 44 countries to develop the first database of the world's winegrape varieties and regions.

Yeast's lifestyle couples mating with meiosis

Posted: 05 Jan 2014 03:28 PM PST

Mating and meiosis -- the specialized cell division that reduces the number of chromosomes in a cell -- are related, but in most yeasts they are regulated separately. Not so in Candida lusitaniae, where the two programs work in unison, according to a new study. Comparison with other species suggests that this fusion may support C. lusitaniae's "haploid lifestyle" of maintaining only one set of chromosomes in each cell.

Population stability 'hope' in species' response to climate change

Posted: 05 Jan 2014 03:28 PM PST

Stable population trends are a prerequisite for species' range expansion, according to new research.

Sex matters for microbes

Posted: 03 Jan 2014 05:45 PM PST

Researchers have observed mating for the first time in the microbes responsible for African sleeping sickness.

Important mutation discovered in dairy cattle

Posted: 03 Jan 2014 05:44 PM PST

High milk yield in dairy cows is negatively correlated to fertility. Scientists have now found a mutation in a gene sequence that affects this relationship.

Research into fruit fly cells could lead to cancer insights

Posted: 02 Jan 2014 08:31 AM PST

New research has shown that cells demonstrate remarkable flexibility and versatility when it comes to how they divide -- a finding with potential links to the underlying causes of many cancers.

Competition in rough neighborhood: Plant success in desert environment

Posted: 31 Dec 2013 09:21 AM PST

In deserts, variable weather is common so that plant community patterns can change between wet and dry years, with high densities and a diversity of plants in wet years, and a reduction in both quantity and number of species in dry years. The effect that two important variables have on plant communities -- competition and water usage -- was investigated in the Sonoran Desert by a research group at the University of Arizona.

Field trial with lignin modified poplars shows potential for bio-based economy

Posted: 30 Dec 2013 02:01 PM PST

The results of a field trial with genetically modified poplar trees in Belgium, shows that the wood of lignin modified poplar trees can be converted into sugars in a more efficient way. These sugars can serve as the starting material for producing bio-based products like bio-plastics and bio-ethanol.

Imaging technology could unlock mysteries of childhood disease

Posted: 30 Dec 2013 10:49 AM PST

A new technique for studying the structure of the childhood RSV virus and its activity in living cells could help researchers unlock the secrets of the virus, including how it enters cells, how it replicates, and perhaps why certain lung cells escape the infection relatively unscathed.

Plan to delist gray wolf endangers other threatened species, researchers find

Posted: 30 Dec 2013 10:49 AM PST

The federal government's proposal to discontinue protection for the gray wolf across the United States could have the unintended consequence of endangering other species, researchers say.

Researchers complete milestone in defining genetic basis of rheumatoid arthritis

Posted: 26 Dec 2013 08:53 AM PST

An international group of investigators has discovered new genes, pathways and cell types that are involved in inherited susceptibility to rheumatoid arthritis.

Environmental fiscal reform would improve environment, reduce informal economy

Posted: 26 Dec 2013 08:52 AM PST

The effect that the introduction of environmental fiscal reform would have on an economic system has been the focus of study since the 1990s. However, studies of this type have until now failed to take the informal economy into consideration. A group of researchers has addressed this subject and have concluded that environmental fiscal reform could help to cut the damage caused by the informal economy on the public system apart from the environmental benefit it would bring in its wake.

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