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| Ecology articles |
Growth in Amazon cropland may impact climate and deforestation patterns
Scientists using NASA satellite data have found that clearing for mechanized cropland has recently become a significant force in Brazilian Amazon deforestation. This change in land use may alter the region's climate and the land's ability to absorb carbon dioxide.
Environmental effects of biofuels crops must be weighed
Biofuels advocates should not ignore the potential ecological side effects of crops being developed to produce such fuels, a researcher at the University of Illinois at Urbana-Champaign says in an article published in Science.
Study finds world warmth edging ancient levels
A new study by NASA climatologists finds that the world's temperature is reaching a level that has not been seen in thousands of years.
Short-term ocean cooling suggests global warming 'speed bump'
The average temperature of the water near the top of the Earth's oceans has significantly cooled since 2003. New research suggests global warming trends are not always steady in their effects on ocean temperatures.
Researchers reveal three distinct modes of dynamic friction rupture with implications for earthquake behavior
A new study by researchers at the California Institute of Technology has revealed important findings about the nature of ruptures and sliding behavior, which could impact how we respond to earthquakes and other disasters.
Ice age North Atlantic temperatures, tropical oceans linked
Sudden shifts in temperature over Greenland and tropical rainfall patterns during the last ice age have been linked for the first time to rapid changes in the salinity of the north Atlantic Ocean, according to research published Oct. 5 in the journal Nature. The results provide further evidence that climate change can have a direct and rapid impact on ocean circulation and chemistry.
Researchers find new information about Earth's origins
Two Dartmouth researchers have learned more about the origins and makeup of the solar nebula, the large gaseous cloud thought to have spawned the solar system. Mukul Sharma, assistant professor of Earth Sciences, and graduate student Rasmus Andreasen, have found evidence that more than one dying star, or supernova, contributed to the makeup of the solar nebula, which in turn, provides insights into the evolution of planets and asteroids soon after their birth some 4,500 million years ago.
Researchers reveal mystery of bacterial magnetism
Scientists at the Naval Research Laboratory and Purdue University have shed light on one of microbiology's most fascinating mysteries-why some bacteria are naturally magnetic. Their description of how being magnetic "helps" the bacteria is reported in the August 2006 issue of the Biophysical Journal.
Study shows strong winds trigger increase in ozone-destroying gases in upper stratosphere in 2006
A surprising new University of Colorado at Boulder study indicates winds circling high above the far Northern Hemisphere have a much greater impact on upper stratospheric ozone levels than scientists had thought.
Bacteria discovery aids food production, water purification
The search for a type of bacteria that creates better ice cream and artificial snow has suddenly become a lot easier, thanks to a discovery by Queen's University biologist Virginia Walker.
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Giant insects might reign if only there was more oxygen in the air
The delicate lady bug in your garden could be frighteningly large if only there was a greater concentration of oxygen in the air, a new study concludes. The study adds support to the theory that some insects were much larger during the late Paleozoic period because they had a much richer oxygen supply, said the study's lead author Alexander Kaiser.
Shrinking ponds signal warmer, dryer Alaska
A first-of-its kind analysis of fifty years of remotely sensed imagery from the 1950s to 2002 shows a dramatic reduction in the size and number of more than 10,000 ponds in Alaska. The analysis, by University of Alaska Fairbanks scientists and published in the Journal of Geophysical Research, indicates that these landscape-level changes in arctic ponds are associated with recent climate warming in Alaska and may have profound effects on climate and wildlife.
Dust may dampen hurricane fury
After more than a dozen hurricanes battered the Atlantic Ocean last year, scientists are wondering what — if anything — might be causing stronger and more frequent storms.
Fossils pinpoint tropics as earth's most fruitful biodiversity ground
A team of scientists has completed a study that explains why the tropics are so much richer in biodiversity than higher latitudes. And they say that their work highlights the importance of preserving those species against extinction.
Biologists get first picture of complete bacterial flagellar motor
When it comes to tiny motors, the flagella used by bacteria to get around their microscopic worlds are hard to beat. Composed of several tens of different types of protein, a flagellum (that's the singular) rotates about in much the same way that a rope would spin if mounted in the chuck of an electric drill, but at much higher speeds-about 300 revolutions per second.
Otherworldly bacteria discovered two miles down
Researchers have discovered an isolated, self-sustaining, bacterial community living under extreme conditions almost two miles deep beneath the surface in a South African gold mine. It is the first microbial community demonstrated to be exclusively dependent on geologically produced sulfur and hydrogen and one of the few ecosystems found on Earth that does not depend on energy from the Sun in any way.
Methane devourer discovered in the Artic
Not lava, but muds and methane are emitted from the Arctic deep-water mud volcano Haakon Mosby. When it reaches the atmosphere, methane is an aggressive greenhouse gas, 25-times more potent than carbon dioxide. Fortunately, some specialised microorganisms feed on methane and thereby reduce emissions of this greenhouse gas. For the first time, a German-French research team showed which methane consuming microorganisms thrive in the ice-cold Arctic deep-sea.
NASA and NOAA announce antarctic ozone hole is a record breaker
NASA and National Oceanic and Atmospheric Administration (NOAA) scientists report this year's ozone hole in the polar region of the Southern Hemisphere has broken records for area and depth.
Far more than a meteor killed dinos
There's growing evidence that the dinosaurs and most their contemporaries were not wiped out by the famed Chicxulub meteor impact, according to a paleontologist who says multiple meteor impacts, massive volcanism in India, and climate changes culminated in the end of the Cretaceous Period.
Long-term ocean data confirm fishing puts species in double jeopardy
For the first time, research has shown that fishing can promote boom and bust swings in supplies of targeted fish stocks.
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| Quotes | By convention!
cussed Tom airily.
Cmon Scully... Itll be a nice trip through the woods-Fox Mulder
But what ... is it good for?
Engineer at IBM, 1968, commenting on the microchip.
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