Climate change could doom Alaska's tundra
...cts and pathogens, which can adapt more readily to changing environmental conditions, may cause massive epidemics of plant disease and insect attack in some cases causing large forest die-offs that could then lead to more fires, adding complexity to the picture. The average annual temperatures in muc...Duke study disputes idea that trees can 'relocate' quickly in response to climate change
...ns for how North American trees might respond to a changing climate, molecular information collected by Duke University researchers refutes a widely accepted theory that many of the continent's tree species migrated rapidly from the deep South as glaciers retreated at the end of the last Ice Age. "When you pu...Droughts like 1930s Dust Bowl may have been unexceptional in prehistoric times, new study suggests
...you realize that it's not only climate change from changing CO2 content in the atmosphere, but also this natural variability out there that we don't fully understand."...Warmer weather, human disturbances interact to change forests
PORTLAND - While a rapidly changing climate may alter the composition of northern Wisc...tions. But human actions also contribute to this changing landscape, according to the results. Says Scheller, "Human influence greatly modifies change in the...Hunt for a new plant hormone points to carotenoids
...ts life cycle and the plant's diverse responses to changing environmental conditions. Many plant biologists therefore believe that there are more plant hormones out there waiting to be discovered. Recent results from work on pea, petunia, and the small weed Arabidopsis have suggested the existence of one such...DNA tests point to extinction of 2 distinctive arctic bird populations
...ediate preservation under the Species at Risk Act, changing management policy on both islands and hunting practices on Newfoundland." Currently there are 19 "endangered" and seven "threatened" bird species in Canada. Three distinct bird species are known to have become extinct in North America since 1900. The...Scientists discover new intricacies in how ulcer bugs stick to stomach
... contains additional sugars (blood types A and B), changing the shape of the target babA seeks to bind. "Most human populations have a mixture of people with blood types A, B and O. When the bacteria spread from one person to another, they can't predict the next host's blood type, so they maintain a fo...New framework for biodiversity conservation
... needs to be melded with a better understanding of changing market dynamics and landowner's choices," says Pos...what will motivate a landowner to sell. In an ever changing world this will have a better success rate in helping the 40% of threatened vertebrates that have no...Living at home helps young mothers stay in school
...ms to confirm the benefit lawmakers had in mind in changing welfare laws in the late 1990s, the data we used were collected before welfare reform. Thus, the results might be different today. For instance, the teenage mother's own parents might not be as available to provide support because current welfare po...Symposium to tackle questions of genetic engineering and biodiversity
...d how might the role of conservation biologists be changing in the new era of "genetic resource planning?" These and other questions will be addressed during a combined symposium and workshop, "Biotechnology and Biodiversity: Understanding the Potential Conservation Risks and Benefits of Genetic Enginee...National Corn Growers Association announces valuable maize genome data now available to scientists
...e and increase opportunities for corn growers in a changing world and to enhance corn's profitability and usage. NCGA represents more than 33,000 members, 25 affiliated state corn grower organizations and hundreds of thousands of growers who contribute to state checkoff programs. Founded in 1998, the Donald D...Leading scientists design new framework for biodiversity conservation
... needs to be melded with a better understanding of changing market dynamics and landowner's choices," says Pos...nges the places that become priorities. In an ever changing world, this will have a better success rate in helping the 40% of threatened vertebrates that have n...Access to DNA secrets yields better understanding of genes, possible tool for disease diagnosis
...he folds of an accordion as a cell responds to its changing needs. When the DNA relaxes, or expands, proteins called transcription factors gain access to the genetic code to "read" its instructions for making a molecule called RNA, which in turn makes other proteins that carry out life's essential functions,...Global competition closes Texas sawmills/paper mills
...s oversupply and reduced prices. Also a factor was changing reading habits of the America public. Increased competition from electronic media reduced the need for newsprint, Barron said. In response, Abitibi-Consolidated closed two of its newsprint mills in East Texas early this year, one in Lufkin and the ...New space-borne instrument to track greenhouse gases, ozone destroyers, and other pollutants
...tting wetter? The answer could shed light on how a changing climate is modifying the atmosphere and how those modifications could in turn feed back into our climate and weather near the ground. How much ozone is sinking from the stratosphere into the upper troposphere? The answer will help scientists separat...Study finds plant enzyme function changes with location in cell
...reby increasing the organism's ability to adapt to changing conditions, Shanklin says. They may also offer scientists new ways to tailor plant products to meet specific needs, such as growing crop plants that make different, perhaps healthier oils. Shanklin and his research associate Ingo Heilmann were studyi...Bacteria spill their guts to aid researchers in quest for new antibiotics
...rs from conditions within the cell. In response to changing membrane tension, MscL alters its shape, opening and closing pores in the membrane. "Mechanosensitive channels such as this change their structure and act as an 'emergency release valve,' equalizing the conditions on both sides of the cell membrane,...New milestones on the path to conquering HIV drug resistance (AIDS)
...TAWAY, N.J. HIV is a moving target, unpredictably changing direction to elude anti-AIDS drugs, but researcher...me different shapes, allowing them to adapt to the changing shapes found in the virus's repertoire of drug-resistant forms. Arnold describes the DAPY antics as ...Basic RNA enzyme research promises single-molecule biosensors
...ations, the researchers also could investigate how changing parts of the ribozyme molecule affected its ability to catalyze chemical reactions. They were surprised to find that modifications they made anywhere on the molecule---even far from the site where the chemical reaction occurs---affected the rate of c...