Minggu, 14 Agustus 2011

ScienceDaily Environment Headlines -- for Sunday, August 14, 2011

ScienceDaily Environment Headlines

for Sunday, August 14, 2011

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Hidden Baja undersea park is the world's most robust marine reserve (August 13, 2011) -- A thriving undersea wildlife park tucked away near the southern tip of Mexico's Baja peninsula has proven to be the world's most robust marine reserve in the world, according to a new study. The most striking finding is that fish communities at a depleted site can recover up to a level comparable to remote, pristine sites that have never been fished by humans. ... > full story

Arctic ice melt could pause for several years, then resume again (August 12, 2011) -- Although Arctic sea ice appears fated to melt as the climate continues to warm, the ice may temporarily stabilize or somewhat expand at times over the next few decades, new research indicates. ... > full story

Rats control appetite for poison: How rodents survive arms race with toxic plants they eat (August 12, 2011) -- Life is tough for woodrats in deserts of the US Southwest. There are few plants for food, and those plants produce poison to deter rodents, insects and other animals. A new study shows how certain woodrats put themselves on a diet to avoid poisoning: They sample a smorgasbord of toxic plants, eat smaller meals, increase time between meals and drink more water if it is available. ... > full story

Polar climate change may lead to ecological change (August 12, 2011) -- Ice and frozen ground at the North and South Poles are affected by climate change induced warming, but the consequences of thawing at each pole differ due to the geography and geology, according to a hydrologist. ... > full story

Engineered bacteria mop up mercury spills (August 12, 2011) -- Thousands of tons of toxic mercury are released into the environment every year. Much of this collects in sediment where it is converted into toxic methyl mercury, and enters the food chain ending up in the fish we eat. New research showcases genetically engineered bacteria which are not only able to withstand high levels of mercury but are also able to mop up mercury from their surroundings. ... > full story

Fossilized pregnant plesiosaur: 78-million-year-old fossils of adult and its embryo provide first evidence of live birth (August 12, 2011) -- Archeologists have determined that a unique specimen now displayed in a museum is the fossil of an embryonic marine reptile contained within the fossil of its mother. ... > full story

The flight of the bumble bee: Why are they disappearing? (August 12, 2011) -- Scientists are trying to learn exactly what is causing the decline in bumble bee populations and are also searching for a species that can serve as the next generation of greenhouse pollinators. ... > full story

Scientists copy the ways viruses deliver genes (August 12, 2011) -- Scientists have mimicked the ways viruses infect human cells and deliver their genetic material. The research hopes to apply the approach to gene therapy -- a therapeutic strategy to correct defective genes such as those that cause cancer. ... > full story

Flatworms provide new insight into organ regeneration and the evolution of mammalian kidneys (August 12, 2011) -- Our bodies are perfectly capable of renewing billions of cells every day but fail miserably when it comes to replacing damaged organs such as kidneys. Using the flatworm Schmidtea mediterranea -- famous for its capacity to regrow complete animals from minuscule flecks of tissue -- as an eloquent example, researchers have demonstrated how our distant evolutionary cousins regenerate their excretory systems from scratch. ... > full story

El Mayor-Cucapah earthquake was simple on surface, complicated at depth, new data show (August 12, 2011) -- Like scars that remain on the skin long after a wound has healed, earthquake fault lines can be traced on Earth's surface long after their initial rupture. Typically, this line of intersection between the area where the fault slips and the ground is more complicated at the surface than at depth. But a new study of the April 4, 2010, El Mayor-Cucapah earthquake in Mexico reveals a reversal of this trend. ... > full story

Route for eliciting HIV-neutralizing antibodies mapped (August 12, 2011) -- Researchers have traced in detail how certain powerful HIV neutralizing antibodies evolve, a finding that generates vital clues to guide the design of a preventive HIV vaccine, according to a new study. ... > full story

New approach to sustain 'forage' fishing (August 12, 2011) -- Reduced catches of small oceanic "forage" fish like sardines and anchovies may be required in some ocean areas in order to protect the larger predators that rely on these species for food. ... > full story


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