Tag: "diversity" at biology news
Humble Pocket Gophers Shed Light On The Genetic Fortitude Of Cheetahs
...ver, gophers from a population with higher genetic diversity
rejected skin grafts from their neighbors--an experimental control that the 1985 study lacked. These results led Sanjayan and Crooks, both Ph.D. candidates in biology, to conclude that the cheetah study was accurate. Consequently, cheetahs and other ...
Behemoth Animals May Follow Same Extinction Patterns
...erestingly, at their height, dinosaurs also have a diversity
ofabout 30 species," Cuffey says. Cuffey and Joe...blow for the dinosaurs, they had been declining in diversity
and numberfor at least 5 million years." For the proboscideans, the final death blow will probably...
UC Berkeley, U.S.G.S. Scientists Discover Microscopic Invader Of San Francisco Bay, The First Known Marine Microbe Invader Of U.S. Waters
...ant fossils, which are found in such profusion and diversity
they are used to date sedimentary rocks going back as far as half a billion years. The organism apparently arrived within the past 10 years from Japan, probably hitching a ride in the ballast tanks of a ship that took on water in a Japanese port and...
Cornell Scientists Find Way To Boost Rice Crop Yield -- They'll Walk On The Wild Side
...ulturists are using only 25 percent of the genetic diversity
available. In other words, the same types of rice...e scientists are re-introducing the crop's natural diversity
-- and increasing the yield. From 1965 to 1995, the world's population doubled to reach its current ...
No Such Luck: Nitrogen From Air Pollution Unlikely to Moderate Global Warming
...tion, the native prairie species went extinct, the diversity
of vegetation dropped sharply, and the ability of ...t the Midwest. The nitrogen-driven loss of diversity
and rise of "weedy" species in grasslands are comparable to the well-documented changes that occur i...
World's Experts Plan Global Locator Service For Environmental Information
... confronted the same problem. They held an amazing diversity
of content but had to work out common agreements on how to catalog it," Christian said. "Today, librarians and citizens everywhere rely on the common formats used in library catalogs. The information locator service builds on these standards as appl...
Stronger Evidence That Global Climate Change Can Reduce The Variety Of Life
...e toestablish a statistical correspondence between diversity
and climatechanges that were caused by cycles of t...interglacial periods like today (high tilt), while diversity
dropssignificantly during glacial periods when global ice sheets expand in size(low tilt). T...
Evolution Re-Sculpted Animal Limbs By Genetic Switches Once Thought Too Drastic For Survival
...olution actually fiddle with this stuff togenerate diversity
of body plan?" says Patel. Many scientists looked ...se body plans. "But it turns out thatmuch of their diversity
arises after this step in development," he said. "Thediversity comes not so much from controlling wh...
Largest Tyrannosaur Fossil Unearthed In Montana
... rich indinosaur remains and unique because of the diversity
represented. And SteveBegin, a forestry consultant from Manistee, Mich., and Louis Trembley, an earthscience teach from Avon High School in Avon, Conn., found the large Tyrannosaur. According to Rigby, Trembly drew the group's attention to the site ...
Limits Of Life On Earth: Are They The Key To Life On Other Planets?
...sess the longevity of the organisms as well as the diversity
of tiny life-forms deposited at the same geographical site thousands or even hundreds of thousands of years apart. The researchers hope to uncover extinct genes or gene fragments to compare with modern counterparts. What is the telltale signature ...
Geologist Finds Hidden Patterns Of Diversification In Ordovician Radiation
...chany localized pattern," said Miller. "The global diversity
trendis misleading for what it says about the rates of transition andperhaps even for what causes them." Miller looked at patterns for each of the major land masses orpaleo-continents existing during the Ordovician. The globalpattern is fairly smooth...
Environment Is Business
...or wildlife mapping. Topics range fromthe wildlife diversity
initiative to balancing economics and ecology. Media packet of materials available at conference,along with computer and modem to file stories....
Biodiversity Worth $2.9 Trillion
...lop strategies and policies to preserve biological diversity
and maintain ecosystem integrity. All these services to humanity are possible only because our planet is such a diverse place. Every species that's lost diminishes that vast resource and makes us all poorer for the loss." Biotic Invoice Estimated a...
Natural Variability Is Key To River Restoration
..." Hudson River (New York, New Jersey): "A lot of diversity
for a river that flows through the most densely po...ork and Pennsylvania): "Retaining its record-high diversity
of fish and mussels, this large stream holds species that used to be in the Allegheny River prior to...
Researchers Construct Genetic Map For Dogs
...ing to Aguirre, because the high degree of genetic diversity
and low number of offspring in human families make informative pedigrees a rarity. These diseases include cancer, epilepsy, retinal degeneration, bleeding disorders, skeletal malformations, and a host of others. Dogs represent a unique genetic resour...
"Discovering Biological Diversity" Is AAAS Topic For USGS Manager
... broadest possible array of knowledge on the diversity
ofnature'sliving creatures and the forces that affect them. NBIIdemocratizesenvironmental science in ways that were impossible even in recenttimes." At AAAS, Carr...
Curing Malaria, Controlling Mosquitoes Symposium Set For AAAS Meeting
... malaria can be prevented whilealso protecting the diversity
of mosquitoes will include Carole A. Long,Allegheny University of the Health Sciences, and Sheila Jasanoff, CornellUniversity. Following the presentations, discussants Marcia C. Linn, Universityof California-Berkeley; Shirley A. Malcolm, AAAS; Floyd...
Long-Standing Puzzle Of Immune System Is Solved By UCSF Researchers
... mutations that arise in genes to generate greater diversity
inthe genes that encode antibodies, proteins that mark disease agents fordestruction. This diversity
provides the immune system with a betterselection from which to choose the best weapons for fighting...
Pet-Owning Couples Are Closer, Interact More Than Pet-Less Couples, UB Study Shows
...lso kept a two-week diary recording the number and diversity
of social contacts. To evaluate responses to stress, Allen hooked up spouses to heart and blood- pressure monitors and introduced a topic identified through the questionnaires as a source of tension or disagreement. She then monitored heart ra...
Researchers From Rockefeller University Develop Novel Method To Fight Cancer
...on theexpression of tumor-specific antigens." The diversity
of tumors and the fact that each person's immune system is uniquecomplicates tumor immunotherapy. Scientists need to match specific proteinfragments derived from a person's tumor to his or her MHC molecule. "The discovery of this new pathway allows ...
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