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Tag: "temperatures" at biology news

Dirty snow may warm Arctic as much as greenhouse gases

...y dirty snow varied from year to year, with higher temperatures in years with many forest fires. Greenhouse gases,...now, causing additional warming. This cycle causes temperatures in the polar regions to rise as much as 3 degrees Celsius during some seasons, the scientists say. ...

For many insects, winter survival is in the genes

..., a hibernation-like state that insects enter when temperatures drop. Insects can stay in this state of arrested development for several months. "We certainly didn't expect to find that many proteins active during diapause," Denlinger said. The researchers report their findings in the current online early edit...

Scripps research team sheds light on long-sought cold sensation gene

...old temperature unpleasant, reliably avoiding cold temperatures in favor of warmer areas. "It’s pretty amazing that one gene could impact thermal sensation this much," says Ajay Dhaka, a Scripps Research postdoctoral fellow in the Patapoutian lab and lead author on the Neuron paper. "It really highlights the ...

Climate change impacts stream life

...climate-change signal over the last 25 years, with temperatures warming faster than could be explained by background variations. An ecological response to warming has also been clear." The study predicts that at the present rate the springtime abundance of macroinvertebrates in streams could decline by as m...

Healthy coral reefs hit hard by warmer temperatures

...disease outbreaks. Our results suggest that warmer temperatures are increasing the severity of disease in the ocean."...

Palau's coral reefs show differential habitat recovery following the 1998 bleaching event

...jected to repeated thermal stress events and water temperatures considerably higher than historical averages. Using underwater digital video cameras, van Woesik and his team examined the rate of coral recovery at 13 different sites, and found that recovery rates increased over time; notably, shelte...

Research says boiling broccoli ruins its anti-cancer properties

...und that storage of fresh vegetables at much lower temperatures such as ?5 °C (much higher than for storage in a refrigerator at 4? °C) may cause significant loss of glucosinolates up to 33% by fracture of vegetable material during thawing. The researchers found that preparation of Brassica vegetables had caus...

Corals that can fight global warming may one day help fragile reefs

...n a 12-degree temperature range. And rising global temperatures appear to be threatening their survival, according...zymatic defenses to fight lethal microorganisms as temperatures rise. These abilities may someday be harnessed to help protect other fragile coral reefs, Harvell sa...

Tundra disappearing at rapid rate

...n both Arctic and mountain environments. As global temperatures continue to increase, the treeline is expected to ..., dry summers—followed by successive years of warm temperatures favourable for seedling growth and survival," said Danby. Widespread changes to treelines could ...

How fish species suffer as a result of warmer waters

...perature fluctuations, are more tolerant to higher temperatures and display wider thermal windows than, for instance, fishes from polar regions living at constant low temperatures. The latter are able to grow and reproduce only within a very limited thermal tolerance window. Investigations at the Alfred Wegene...

New findings blow a decade of assumptions out of the water

...r denitrification ?if climate change altered ocean temperatures and the rates of the two processes, for instance. The new findings show the processes are happening within a few hundred miles of each other so the balance could be reached within a decade, the authors estimate. Deutsch compares the old assumptio...

Gene that makes people 'early to bed and early to rise' demystified

... the condition generally show changes in core body temperatures and other characteristics governed by the circadian clock that are shifted up by three to four hours. The syndrome is passed on in a dominant fashion, meaning that it takes just one copy of the abnormal gene to exhibit symptoms. The UCSF group had ...

Antarctic warming to reduce animals at base of ecosystem, shift some penguin populations southward

...ne ecosystems respond dramatically to increases in temperatures along the Antarctic Peninsula," explained Berry Ly...a implies that there may be less food there as the temperatures rise," he said. He manages the LTER site in the Dry Valleys near McMurdo Station, the largest of...

Mystery of fossilized trees is solved

...of Carbon Dioxide from the atmosphere. This caused temperatures to drop and the planet became very similar to its present-day condition." Dr Berry worked with colleagues from Binghampton University, New York and from New York State Museum, which discovered the two trunk fossils. Their findings are published in...

Bumblebee house warming -- it takes a village

...es is their ability to maintain fairly stable body temperatures when flying to flowers. Whether and how they main...heat their bodies, and can remain active at cooler temperatures than many other insects. To achieve optimum conditions for their young, bumblebees rely on nest the...

Microfossils unravel climate history of tropical Africa

...rely new method to reconstruct the history of land temperatures based on the molecular fossils of soil bacteria. T... called 'proxies'. New method to measure soil temperatures Reconstructing continental temperature history is more difficult than for the oceans, because so...

Fish growth changes enhanced by climate change

... specialist skills in analysing otoliths. Water temperatures have been obtained from a 60-year-long record at M... shallow and deep-water species suggest that water temperatures have been a primary factor in determining juvenile growth rates in the species examined ?Banded morw...

Satellites shed light on global warming

...eans, increasing the ocean temperature. Average temperatures in the Antarctic Peninsula have risen over the las...know of measuring the precise rate at which global temperatures are increasing and improves the accuracy of our climate change models and weather forecasts. "Th...

Volcanic eruptions, ancient global warming linked

...a period of global warming that raised sea surface temperatures by five degrees (Celsius) in the tropics and more than six degrees in the Arctic. The findings were reported in this week’s edition of Science. The study is important, experts say, because it documents the Earth’s response to the release of large...

Cryoablation -- A new treatment option for some kidney tumor patients

..., which results in rapid freezing of the tissue to temperatures of -100° C; and the tissue is then thawed by replacing the argon with helium. The procedure consists of two freezing and thawing cycles, seeking a frozen margin of approximately 5 millimeters beyond the tumor edge to ensure death of the entire tumor...

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