Human population growth already slowing
...g-increasing human population growth rate began an abrupt decline in the 1970s, and these equations agree with recent work by demographers, Lehman said. He presented his work Monday, Aug. 6, at the Ecological Society of America meeting in Madison, Wis. Beginning with Charles Darwin, ecological theorists hav......ad, Panamas high beta-diversity must be due to the abrupt variation in rainfall across the Central American isthmus, from the ever-wet Caribbean shoreline to the dry Pacific slope. Forests across western Amazonia, however, were more uniform in species composition than the theory allowed, a surprising resu...Media Advisory 2 - 2002 Ocean Sciences Meeting: press conferences scheduled
... a 3-D biogeochemical model that indicates that an abrupt climate change that took place in the late 1970s caused dramatic changes in the ecosystem's response. Participants: Christopher L. Sabine, University of Washington, Seattle, Washington; Steven Emerson, School of Oceanography, University of Washin...... between these two regions. Not only are there are abrupt changes in frequency tuning and response selectivity but in binaural processing as well. One way in which this organization of binaural processing can be interpreted in light of the need for dual-stream processing is that regions serving echolocation...Is the evidence for human 'replacement' really clear?
...d archaeological material documenting a relatively abrupt replacement of one species by another in the European landscape, the accumulating evidence, particularly in archaeology, is increasingly one of geographical and behavioral mosaics.The archaeological evidence, Clark says, shows that many of the trait...Scientists push back primate origins from 65 million to 85 million years ago
... not exist there during the Cretaceous. The first, abrupt appearance of primate fossils in the northern continents about 55 Mya is often taken as evidence for a northern continental origin during the Paleocene. Contrary to this accepted theory, the authors attribute the dearth of primate fossils during the ...Origin of bipedalism seems most closely tied to environmental changes
...complex opening of habitats, rather than a single, abrupt transition from dense forest to open savanna, he said. Richmond, from the University of Illinois, with anthropologist David Begun from the University of Toronto and David Strait from the department of anatomy at the New York College of Osteopathic Me...The prehistory of neotropical lowland forests
.../or drier than the early and mid-Holocene, with an abrupt transition at about 11,000 years ago. During the Holocene, smaller variations in precipitation took place over cycles of about 15 years. The periodic climatic phenomenon known as the El Nio/Southern Oscillation (ENSO) has had drastic effects on huma...November GEOLOGY and GSA TODAY media highlights
...ges 971-974. Studying biological responses to past abrupt climate changes provides insight into the resilien...composition responded within 0 to 200 years to the abrupt climate events accompanying the last deglaciation. Median response times were less than 100 years a...January GEOLOGY and GSA TODAY media highlights
...lse (MWP) 1a. Together with the Blling warming (an abrupt rise in Northern Hemisphere air temperature of at ...to the open SCS during the last deglaciation. This abrupt decrease is paralleled by an equally rapid increase in sea-surface temperatures, corresponding with ...Science picks-leads, feeds and story seeds (January 2003)
...atterns over several decades (1941-1999). Such an abrupt rise in streamflow, rather than a gradual increase...ess significant increases in high streamflow. The abrupt rise in streamflow occurred mostly in the eastern U.S. and coincided with an increase in precipitati...Squirrels' evolutionary 'family tree' reveals major influence of climate, geology
...rioration in the past 55 million years. There's an abrupt cooling and climatic fluctuation, and also a lot of extinctions in other animal groups. Big things were happening environmentally."The first evidence for squirrels in Europe dates to about 30 million years ago, though the researchers are not sure how...Changes in jet stream, storm tracks, linked to prairie drought patterns, study finds
...he Canadian prairies show a previously unknown and abrupt shift in climatic conditions around AD 700, while ... throughout the entire span. "The persistence and abrupt nature of these millennial-scale events represents a scale of climate change that isn't well underst...Mother-infant bed sharing is associated with an increase in infant heart rate
...o deficiencies in arousal which are accompanied by abrupt increases in sympathetic activity. Until other studies are available, it would be premature to conclude that any positive or negative clinical effects are associated with the heart rate changes reported here....Hypothermia helps brain heal after cardiac arrest, finds University of Pittsburgh study
...edicine physician. Cardiac arrest is the sudden, abrupt loss of heart function. Death usually occurs within minutes unless cardiopulmonary resuscitation (CPR) and rapid defibrillation is available. As cardiac arrest progresses, blood flow to the brain ceases. If a patient survives long enough to make it t...Brain cells seen recycling rapidly to speed communications
...ing stimulation, they usually observed a series of abrupt and lasting -- albeit partial -- decreases in fluorescence, indicating multiple fusion events. Yet, only rarely was there a full loss of fluorescence, indicating full classical collapse. "A likely explanation is that most fusion events were simply ...New findings in yeast may reveal why growing older is the greatest carcinogen in humans
...yeast could be used as a model to help explain the abrupt increase in human-cancer risk, the researchers tracked the life cycles of multiple yeast strains. Most yeast cells survive for about 30 or 35 generations of cell division. Each generation is represented by a mother cell's production of a new daughter...Alcoholics with antisocial personality disorder have blunted emotional reactivity
... that is evoked when a person is presented with an abrupt event, such as a loud, unexpected noise. The reflex in this case, the eye blink is influenced by emotional states. It is "normally" larger when an individual is presented with unpleasant pictures, sounds or odors, and smaller when presented with ...OHSU-led research examines role of copper, iron in diseases
...emors, rigidity, drooling, difficulty with speech, abrupt personality change, and unusual behavior associated with neurosis and psychosis. If untreated, it is generally fatal by age 30. Iron metabolism and its link to hemochromatosis is being studied as well by OHSU investigators. An inherited disease, he...Century may bring unprecedented climate change to southern hemisphere
... the northern hemisphere in general, experience an abrupt warming of 5 degrees Celsius over two centuries. Bush expected to find the same results in South America. What he found instead was a much more gradual warming, 5 degrees over several millennia. This discovery may explain why there was less extinctio...