Ecology articlesAfrica's biggest mammals key to ant-plant teamwork
Throughout the tropics, ants and Acacia trees live together in intricate interdependent relationships that have long fascinated scientists.
Older arctic sea ice is giving way to young, thin ice
A new study by University of Colorado at Boulder researchers indicates older, multi-year sea ice in the Arctic is giving way to younger, thinner ice, making it more susceptible to record summer sea-ice lows like the one that occurred in 2007.
Solar power inverter – a key component in your home solar power system
There is much interest in renewable energy sources these days. This is partly due to the increased awareness of environmental issues causes by using fossil fuels.
Pulselike and cracklike ruptures in earthquake experiments
Lab experiments that mimic the way the ground moves during destructive earthquakes require some sophisticated equipment, and they yield valuable insights. Caltech scientists studying how sliding motion spreads along a fault interface conducted a series of experiments involving ultrafast digital cameras and high-speed laser velocimeters to replicate a range of realistic fault conditions.
First evidence of under-ice volcanic eruption in Antarctica
The first evidence of a volcanic eruption from beneath Antarctica's most rapidly changing ice sheet is reported in the journal Nature Geosciences. The volcano on the West Antarctic Ice Sheet erupted 2000 years ago (325BC) and remains active.
Seismic images show dinosaur-killing meteor made bigger splash
The most detailed three-dimensional seismic images yet of the Chicxulub crater, a mostly submerged and buried impact crater on the Mexico coast, may modify a theory explaining the extinction of 70 percent of life on Earth 65 million years ago.
Ebola virus disarmed by excising a single gene
The deadly Ebola virus, an emerging public health concern in Africa and a potential biological weapon, ranks among the most feared of exotic pathogens.
Hot springs microbes hold key to dating sedimentary rocks, researchers say
Scientists studying microbial communities and the growth of sedimentary rock at Mammoth Hot Springs in Yellowstone National Park have made a surprising discovery about the geological record of life and the environment.
Human-generated aerosols affect our weather
The rise of human-generated pollution in the global atmosphere is forcing a change in ocean circulation in the Southern Hemisphere, in turn affecting our region's weather systems.
New antarctic ice core to provide clearest climate record yet
After enduring months on the coldest, driest and windiest continent on Earth, researchers today closed out the inaugural season on an unprecedented, multi-year effort to retrieve the most detailed record of greenhouse gases in Earth's atmosphere over the last 100,000 years.
Ecologists, material scientists pursue genetics of diatom's elegant, etched casing
Diatoms -- some of which are so tiny that 30 can fit across the width of a human hair -- are so numerous that they are among the key organisms taking the greenhouse gas carbon dioxide out of the Earth's atmosphere.
Antarctic ice loss speeds up, nearly matches greenland loss
Ice loss in Antarctica increased by 75 percent in the last 10 years due to a speed-up in the flow of its glaciers and is now nearly as great as that observed in Greenland, according to a new, comprehensive study by UC Irvine and NASA scientists.
Ant garden in a tree: smells help explain rainforest relationship between ants and plants
In the Amazon rainforest, ants live in trees and plant gardens, and now, research led by a graduate student at North Carolina State University has explained in part how this symbiotic relationship between ants and plants functions.
Earth's soils bear unmistakable footprints of humans
The dirt under our feet is being so changed by humans that it is now appropriate to call this the "Anthropocene (or man-made) Age," says a new worldwide overview by Duke University soil scientist Daniel Richter.
Increased hurricane activity linked to sea surface warming
The link between changes in the temperature of the sea's surface and increases in North Atlantic hurricane activity has been quantified for the first time. The research - carried out by scientists at UCL (University College London) - shows that a 0.5°C increase in sea surface temperature can be associated with a ~40 per cent increase in hurricane activity.
FAO unveils new bioenergy assessment tool
A decision-support tool developed by FAO will help ensure that countries can enter the rapidly growing field of bioenergy industry to produce benefits for the poor without jeopardizing their food security.
Tipping elements in the earth's climate system
Anthropogenic forcing could push the Earth's climate system past critical thresholds, so that important components may "tip" into qualitatively different modes of operation. In the renowned magazine "Proceedings of the National Academy of Sciences" (PNAS) an international team of researchers describes, where small changes can have large long-term consequences on human and ecological systems.
"Biodiversity is vital for human survival and livelihoods," FAO Deputy Director-General says
"Biodiversity is vital for human survival and livelihoods; we need to conserve it for future generations. At the same time, the unacceptable scale of hunger and rural poverty in our small planet calls for urgent remedial action
Fossil fuels and nitrogen fertilizers may be slowly reducing the number of plant species globally
The number of plant species worldwide may be dwindling from the effects of chronic low levels of nitrogen on terrestrial ecosystems, according to a University of Minnesota study.
Computer simulations strongly support new theory of earth's core
Swedish researchers present evidence that their theory about the core of the earth is correct. Among other applications, the findings may be of significance for our understanding of the cooling down of the earth, and of the stability of the earth's magnetic field.