Posts Tagged ‘population’
6 trends that will transform the US
UNC-CHAPEL HILL (US) — Data from the 2010 Census will likely confirm several major demographic shifts in the United States, say researchers, including an overall “browning” and “graying” of America. Continue…
Tuesday, January 18, 2011 13:42 - 1 Comment
Earth & Environment - May 11, 2010 17:06 - 2 Comments
Monarchs fly north toward uncertain future
U. KANSAS (US)—Low temperatures, storms, and habitat destruction made it a tough winter in Mexico for monarch butterflies, but the news is not all doom and gloom. (more…)
Earth & Environment - Feb 12, 2010 12:18 - 9 Comments
Genetically modified crops here to stay
UC DAVIS (US)—Global climate warming and population growth will necessitate sweeping changes in how the world produces its food and fiber. (more…)
Earth & Environment - Jan 28, 2010 16:59 - 4 Comments
Hunted minke whales not overpopulated
STANFORD (US)—Antarctic minke whale meat on the shelves of Japanese grocery stores has helped scientists prove that the animal’s population is not booming, but rather is within the historical norm of the species over the last 100,000 years. (more…)
Earth & Environment - Jan 12, 2010 10:48 - 1 Comment
Western butterflies—nowhere to go but up
UC DAVIS—California butterflies are reeling from a one-two punch of climate change and land development, suggest the results of a study led by butterfly expert Arthur Shapiro. (more…)
Health & Medicine - Dec 21, 2009 11:39 - 0 Comments
Phone records predict malaria’s next move
U. FLORIDA (US)—Researchers at work on a malaria elimination study in Africa have become the first to predict the spread of the disease using cell phone records. (more…)
Earth & Environment - Nov 11, 2009 18:09 - 1 Comment
Pacific white sharks stick to familiar waters
STANFORD (US)—The white shark may be the ultimate loner of the ocean, cruising thousands of miles in a solitary trek, but a team of researchers has discovered that white sharks in the northeastern Pacific Ocean have separated themselves into a population genetically distinct from sharks elsewhere in the world. (more…)
Earth & Environment - Nov 3, 2009 14:54 - 1 Comment
As wolves age, killer instincts fade
U. MINNESOTA (US)—Young wolves are leaders of the pack as far as the ability to kill elk is concerned. However, a new study of wolves in Yellowstone National Park finds wolves are in their hunting prime at the ages of 2 and 3, but after that, their skills deteriorate steadily. (more…)
Earth & Environment - Aug 26, 2009 11:28 - 1 Comment
Timid teen sharks stay close to home
From 1995 to 2007, more than 1,700 immature lemon sharks were caught, tagged, and released. The implanted tags, plus subsequent recaptures and DNA analysis, showed that more than half of the 3- to 7-year-old sharks caught off Bimini were born locally and had lingered near their birthplace for years.
Earth & Environment - Aug 13, 2009 12:37 - 0 Comments
Toastier temps make for smaller sheep
Soay sheep graze on the Scottish island of Hirta. Their average size has been declining since 1985, and researchers suspect warmer temperatures are playing a role. (Credit: Tim Coulson)
Society & Culture - Aug 6, 2009 4:00 - 1 Comment
Fertility resurges as countries grow wealthy
“This study provides some ‘light at the end of the tunnel’ for countries that were concerned about population aging and population decline as a result of very low fertility rates,” says study coauthor Peter Kohler.
Earth & Environment - Jul 24, 2009 14:43 - 0 Comments
Noisy nests not for the birds
“Understanding how birds respond to noise, especially birds with critical links to ecosystems, are crucial in maintaining biodiversity in growing areas of landscapes disturbed by urban clamor,” says lead author Clinton Francis. (Western Tanager pictured above. Courtesy: Clinton Francis)
Earth & Environment - Jul 24, 2009 12:17 - 2 Comments
Predator and prey direct nature’s synchronicity
“Predators fundamentally change the way that their prey vary through time, creating a cyclic pattern that is quickly synchronized across many locations with only small amounts of dispersal,” says Yale’s David Vasseur.
Earth & Environment - Jun 4, 2009 13:53 - 0 Comments
Farming the sea to feed the world
An open-air “nursery” outside the main Wrigley Institute research building is where USC professor Dennis Hedgecock grows the oysters he breeds and crosses in a lab inside. Seawater is pumped into bins, which hold oyster seeds that are about the size of a shirt button. Hedgecock compares a meaty hybrid oyster at right with an inbred oyster of the same age. (Credit: Philip Channing/University of Southern California)
