Senin, 04 Mei 2015

ScienceDaily: Top Environment News

ScienceDaily: Top Environment News


Tough laws to stop the trade of endangered wildlife 'not enough'

Posted: 03 May 2015 06:58 AM PDT

Western conservation groups are seeking stricter law enforcement to tackle a trade in endangered wildlife, but a researcher warns that this is not a 'silver bullet' solution. He highlights the case of the Bali starling, where bringing in tougher laws back-fired -- only serving to make the bird more popular among the elite. He highlights how sometimes local people who know the realities on the ground get better results.

Marshes, reefs, beaches can enhance coastal resilience

Posted: 03 May 2015 06:52 AM PDT

The resilience of U.S. coastal communities to storms, flooding, erosion and other threats can be strengthened when they are protected by natural infrastructure such as marshes, reefs, and beaches, or with hybrid approaches, such as a "living shoreline" -- a combination of natural habitat and built infrastructure, according to a new study.
READ MORE - ScienceDaily: Top Environment News

Read more...

Sabtu, 02 Mei 2015

ScienceDaily: Top Environment News

ScienceDaily: Top Environment News


Seafloor sensors record possible eruption of underwater volcano

Posted: 01 May 2015 07:15 PM PDT

If a volcano erupts at the bottom of the sea, does anybody see it? If that volcano is Axial Seamount, about 300 miles offshore and 1 mile deep, the answer is now: yes.

Ocean fronts improve climate and fishery production, study finds

Posted: 01 May 2015 03:21 PM PDT

Ocean fronts -- separate regions of warm and cool water as well as salt and fresh water -- act to increase production in the ocean, research has found. This research showed how fronts can be incorporated into current climate and fisheries models to account for small-scale interactions in fishery production and cycling of elements such as carbon and nitrogen in the ocean.

Lousy sockeye are lousy competitors

Posted: 01 May 2015 03:21 PM PDT

A key discovery has been made regarding Fraser River sockeye's vulnerability to sea lice. Their recently published research indicates that juvenile Fraser River sockeye salmon that are highly infected with sea lice are 20 percent less successful at consuming food than their lightly infected counterparts.

Flowing against the stream: Inanimate beads behave in lifelike ways

Posted: 01 May 2015 12:16 PM PDT

Synthetic microscopic beads sense changes in their environment and self-propel to migrate upstream, a step toward the realization of biomimetic microsystems with the ability to sense and respond to environmental changes.

Global decline of large herbivores may lead to an 'empty landscape'

Posted: 01 May 2015 12:16 PM PDT

The decline of the world's large herbivores, especially in Africa and parts of Asia, is raising the specter of an 'empty landscape' in some of the most diverse ecosystems on the planet. Many populations of animals such as rhinoceroses, zebras, camels, elephants and tapirs are diminishing or threatened with extinction in grasslands, savannahs, deserts and forests.

Coal-tar-sealant runoff causes toxicity and DNA damage

Posted: 01 May 2015 10:17 AM PDT

Runoff from pavement with coal-tar-based sealant is toxic to aquatic life, damages DNA, and impairs DNA repair, according to new research. Rainwater runoff collected as long as three months after coal-tar-sealcoat application caused 100% mortality to minnows and water fleas, which are part of the base of the food chain.

Species' evolutionary choice: Disperse or adapt?

Posted: 01 May 2015 09:54 AM PDT

Dispersal and adaptation are two evolutionary strategies available to species given an environment. Generalists, like dandelions, send their offspring far and wide. Specialists, like alpine flowers, adapt to the conditions of a particular place. New research models the interplay between these two strategies and shows how even minor changes in an environment can create feedback and trigger dramatic shifts in evolutionary strategy.

How to reset a diseased cell

Posted: 01 May 2015 09:54 AM PDT

In proof-of-concept experiments, researchers demonstrate the ability to tune medically relevant cell behaviors by manipulating a key hub in cell communication networks. The manipulation of this communication node makes it possible to reprogram large parts of a cell's signaling network instead of targeting only a single receptor or cell signaling pathway.

Highly efficient CRISPR knock-in in mouse

Posted: 01 May 2015 07:35 AM PDT

The CRISPR/Cas system, which is based on chemically synthesized small RNAs and commercially available Cas9 enzyme, has enabled long gene-cassette knock-in in mice with highest efficiency ever reported, scientists report.

Health benefits of coffee: Coffee can act as an antioxidant

Posted: 01 May 2015 07:00 AM PDT

New research has brought us closer to being able to understand the health benefits of coffee.

Mechanisms for continually producing sperm

Posted: 01 May 2015 06:59 AM PDT

Continually producing sperm over a long time is important to procreate the next generation. Researchers have revealed that there are differences in reactivity to retinoic acid in spermatogonial stem cells, and these differences are a key factor to the persistence of sperm production with inexhaustible stem cells.

Guidance improves food safety practices at school, community gardens

Posted: 01 May 2015 06:59 AM PDT

School and community gardens have become increasingly popular in recent years, but the people managing and working in these gardens are often unfamiliar with food safety practices that reduce the risk of foodborne illness. Now researchers have developed guidelines that address how to limit risk in these gardens -- and a pilot study shows that the guidelines make a difference.

Elusive new bird discovered in China

Posted: 01 May 2015 06:59 AM PDT

An international team of scientists has discovered a new bird in China. The new bird, the Sichuan bush warbler, resides in five mountainous provinces in central China. The bird has shunned the limelight by hiding in grassy, scrubby vegetation over the years. However, its distinctive song eventually gave it away, said an integrative biologist on the team.

GIS study reveals preferred habitat of the Asian elephant

Posted: 01 May 2015 06:58 AM PDT

New results show that Asian elephants preferred secondary forests, presumably because of the abundance of ground grass to eat. The study also found that they spend 75% of their time within 1.5 km of their water source.

Heritage destruction in conflict zones provides archaeological opportunities

Posted: 01 May 2015 05:17 AM PDT

An international archaeological team is investigating an historic site devastated by conflict in Lebanon. They have demonstrated it is possible to obtain original and important information from heritage sites that have been devastated by conflict.

Regions at greatest risk for species extinction the least studied

Posted: 30 Apr 2015 07:57 PM PDT

Scientists have crunched the numbers and the results are clear. For every degree that global temperatures rise, more species will become extinct. Overall, the study predicts a nearly 3 percent species extinction rate based on current conditions. If the earth warms another 3°C, the extinction risk rises to 8.5 percent. And if climate change continues on that trajectory, the world would experience a 4.3°C rise in temperature by the year 2100 -- meaning a 16 percent extinction rate.

Substantial benefits for health, environment through realistic changes to UK diets

Posted: 30 Apr 2015 06:20 PM PDT

Making a series of relatively minor and realistic changes to UK diets would not only reduce UK diet-related greenhouse gas emissions by nearly a fifth, but could also extend average life expectancy by eight months, according to new research.

Viruses: You've heard the bad; here's the good

Posted: 30 Apr 2015 02:07 PM PDT

Viruses, like bacteria, can be important beneficial microbes in human health and in agriculture, researchers say, following a review of the current literature on beneficial viruses.

Geological foundations for smart cities: Comparing early Rome and Naples

Posted: 30 Apr 2015 08:36 AM PDT

Geological knowledge is essential for the sustainable development of a 'smart city' -- one that harmonizes with the geology of its territory. Making a city 'smarter' means improving the management of its infrastructure and resources to meet the present and future needs of its citizens and businesses.

Bacterial viruses carry genetic instructions for their DNA transport in host cell

Posted: 30 Apr 2015 05:27 AM PDT

Researchers have demonstrated for the first time that bacteriophages (bacterial viruses) carry genetic instructions for proteins that mediate the transport of their DNA to specialized replication sites in the host cell.
READ MORE - ScienceDaily: Top Environment News

Read more...

  ©Template by Dicas Blogger.