Tag: "arctic" at biology news
Foxes get frisky in the far north
...lt foxes and their offspring that proves that some arctic
foxes are mixing it up when it comes to mating. ...f Quebec at Rimouski collected DNA samples from 49 arctic
foxes trapped in dens on Bylot Island, Nunavut. In three-quarters of the dens, DNA fingerprints s...
Study helps preserve Arctic whale, Eskimo subsistence hunt
...een a food staple for Eskimos and other indigenous arctic
peoples dating to prehistoric times. Due in part to research done by Purdue University professor John Bickham, the International Whaling Commission ruled last week to allow Eskimos to harvest 56 whales per year, the same quota that had been in place ...
Will lemmings fall off climate change cliff?
...y predators that rely in large part on these small arctic
rodents," said WCS Canada researcher Dr. Don Reid.... prey species for a number of predators, including arctic
foxes, red foxes, rough-legged hawks, peregrine falcons, snowy and short-eared owls, jaegers, gulls,...
UAF researchers garner $6.5 million in NSF grants
...ficult to produce accurate and reliable records of arctic
precipitation. For 8 to 10 months of the year, pre...es and forms a long-lasting cover that affects the arctic
system even more than the amount of precipitation falling. This project will establish an interna...
Why do birds migrate?
...r example, some really long-distance migrants like arctic
terns are not fruit-eaters." Boyle, an adjunct lecturer in UA's department of ecology and evolutionary biology and co-author Courtney J. Conway, a UA assistant professor of natural resources and a research scientist with the U.S. Geological Survey,...
Durable critters providing insight for human egg preservation
...es bread with his children does as well. Similarly arctic
wood frogs use the sugar, glucose, to tolerate frigid temperatures until the summer thaw. While humans dont naturally produce trehalose, researchers think they can use it to safely preserve human eggs and those of endangered species giving better...
Carnegie Mellon's Granger Morgan pens op-ed
...y about 20 percent -- a small price to pay to save arctic
seals, polar bears, coral reefs and other valuable ecosystems," Morgan said....
Mixing exploitation and conservation: A recipe for disaster
...ts of flying up to 16,000 kilometers between their arctic
breeding grounds and winter homes in Europe and the tropics; their gizzard expands and contracts to balance daily food intake and energy needs. To determine the effects of dredging on the birds, the authors sampled prey quality and density over 2,800...
Shrinking ponds signal warmer, dryer Alaska
...h, 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. Over the past 50 years, Alaska has experienced a warming climate with longer growing seasons, increased permafrost thawing, an increase...
Tropics source of much of world's biodiversity
...pics and increasing the diversity in temperate and arctic
regions," he said. "We should preserve the tropics...g season there versus the short season in cold and arctic
regions. The harsh conditions in the north also make it harder for specialized feeders to survive. S...
USGS at The Wildlife Society: From sea-ice change to contaminants to predators and prey
...y important with the recent substantial decline of arctic
sea ice because identifying factors associated with haul-out status will lead to more accurate population estimates and provide more information about walrus behavior and sea ice usage. Walruses spent the majority of their time in water, averaging on...
MBL scientists to present results of long-term ecological research at NSF meeting
...Poster 87 - Controls on N accumulation and loss in arctic
tundra ecosystems - http://www.lternet.edu/asm/2006/posters/poster.php?poster_id=343 MBL Author(s): Marselle Alexander-Ozinskas (*), Brown-MBL Graduate Student; Gaius Shaver (*), Senior Scientist; Anne Giblin, Senior Scientist; Jim Laundre, Research...
Cassini's Visual and Infrared Mapping Spectrometer detects vast polar ethane cloud on Titan
...sini spacecraft radar found lakes in Titan's north arctic
latitudes on a flyby last July 22. However, "We no...rom between 30 km and 60 km at the edge of Titan's arctic
circle, between 51 degrees and 69 degrees north latitude. VIMS saw only part of the cloud because mo...
Ecological change, climate variation addressed at international conference, September 20-24
...ew geochemical method at other permafrost sites in arctic
and boreal regions. Rising Atlantic seas threaten coastal water birds Ecologist Michael Erwin of the University of Virginia and others have monitored changes at salt marsh locations in Virginia (at the Virginia Coast Reserve LTER site), New Jerse...
UAF to host AAAS Arctic Division conference
... the Arctic and on observations and evaluations of arctic
change: the changing physical environment, social and economic changes, and natural resources. Sessions will focus on recent discoveries, their interpretation and policy implications, and will include the perspectives of multiple disciplines, from ec...
Siberian lakes burp 'time-bomb' greenhouse gas
...irst circumpolar estimate of methane emissions for arctic
lakes, linking process-based field surveys with remote sensing analysis....
ACS News Service Weekly PressPac -- August 30, 2006
...ge baculum is critical for successful mating in an arctic
climate, the researchers note, and even slight decreases may interfere with reproduction. "Furthermore, similar physiological impacts from organohalogen-pollutant exposure may be manifested on the reproductive tract of humans relying on OHC-contamina...
UA strengthens commitment to Arctic research
...ska campuses intensely researching everything from arctic
tree line seedlings and permafrost to lake sedimen...na." Alaska is uniquely positioned for polar and arctic
research, and the university has gained an international reputation in the areas of global climate c...
Ancient Arctic water cycles are red flags to future global warming
...f precipitation and characteristics of the ancient arctic
water. "Our results told us a lot about the way that the large-scale water cycle is affected during global warming," said Mark Pagani, professor of geology and geophysics at Yale and principal author of the study. The large-scale water cycle refers...
Study documents marathon migrations of sooty shearwaters
...he migrations of the sooty shearwater would be the arctic
tern, which breeds in the Arctic and migrates to Antarctica. But we don't know if they do that in a single season, because nobody's ever tracked them," said Scott Shaffer, a research biologist at the University of California, Santa Cruz, and first au...
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