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Tag: "temperatures" at biology news

Fruit flies and global warming -- Some like it hot

...re much more often caught at the baits at very hot temperatures while control flies were more often caught at cooler temperatures, while there was an overall balance between negative and positive effects of the heat treatment at intermediate temperatures. As Volker Loeschcke puts it, "a small amount of heat expos...

Huddling and a drop in metabolism allow penguins to survive the South Pole cold

...rchers conducted the first recordings of deep body temperatures in free ranging birds throughout their breeding cy...eeding emperor penguins at their colony. Deep body temperatures of the five free-ranging penguins throughout their breeding cycle were on average 36.7 ± 0.3°C. Duri...

More species in the tropics because species have been there longer

... of most tropical species to tolerate the variable temperatures of temperate areas. According to John Wiens, the study has important conservation implications: "If the pattern we see in treefrogs holds true for most other groups, then the tropics may have more ancient lineages and more genetic diversity per s...

Record ozone loss during 2006 over South Pole

... "Such significant ozone loss requires very low temperatures in the stratosphere combined with sunlight. This y...ar's extreme loss of ozone can be explained by the temperatures above Antarctica reaching the lowest recorded in the area since 1979," ESA Atmospheric Engineer Clau...

Evolution of Old World fruit flies on three continents mirrors climate change

...s between sample collections. At nearly all sites, temperatures had increased consistent with global warming. "If the inversions are sensitive to temperature, then you'd expect to see a corresponding increase in low-latitude-type inversions at all latitudes," Huey said. When the researchers compared the old...

Gold nanoparticles prove to be hot stuff

...he heating effect could be useful in raising local temperatures in certain experiments, such as heating a protein just enough to allow scientists to watch it unfold, the paper suggests. ...

Vaccine-producing 'plant-factories'

... They found that these proteins resisted high temperatures and withstood extreme conditions, characteristics of glycosylate proteins. The discovery was unexpected because the literature written to date does not contemplate the presence of this type of protein in the chloroplast. Once the presence of this ...

NASA satellite data helps assess the health of Florida's coral reef

...ve accurate, up-to-date information on sea surface temperatures to identify areas vulnerable to bleaching. The data was also used to measure the cumulative heat buildup over several weeks, shown to be particularly important to the health of reefs. "MODIS imagery is beneficial because it provides more detail tha...

Tarantula venom and chili peppers target same pain sensor

...iting the same nerve cells in mice that sense high temperatures and the hot, spicy ingredient in chili peppers, UCSF scientists have discovered. The findings demonstrate that some plants and animals have evolved the same molecular strategy to deter predators -- triggering pain by activating a specific receptor o...

Life in the extreme

...y inorganic chemical reactions which occur at high temperatures and pressures. Near cold seeps in the Eastern Mediterranean, Sébastien Duperron from Université Pierre et Marie Curie in France has found unique bacterial symbiosis with mussels. Symbiotic associations between bivalves (mussels) and bacteria allo...

Reef warns of sea level rise

...f what could happen again as global CO2 levels and temperatures rise during the 21st century. "We've dated the r...d locked up water," Prof. McCulloch says. "Water temperatures off Margaret River would then have been more like water temperatures off Geraldton today, allowing t...

From hot springs to rice farms, scientists reveal new insights into the secret lives of archaea

...philic archaea live in these shallow waters, where temperatures sometimes approach the boiling point. Rogers found...ce as many archaeal species at relatively moderate temperatures of 59 C (38 F) than at hotter vents where the thermometer reached 94 C (201 F). Climate change ...

Seals protect brain, conserve oxygen by turning off shivering response on icy dives

...ir bodies continued to cool. Their heart rates and temperatures dropped while they dove, but when they returned to...ep of not shivering, Folkow said. By allowing body temperatures to drop, they slow metabolism and reduce oxygen demand. In addition, since shivering itself requires...

Rising ocean temperatures, pollution have oysters in hot water

Oysters exposed to high water temperatures and a common heavy metal are unable to obtain suff...al, reduces the oyster's tolerance of warmer water temperatures and makes it more vulnerable during the summer when water temperatures rise. Half of the oysters exp...

Shrinking ponds signal warmer, dryer Alaska

...a study area in the Arctic Coastal Plain where the temperatures are much colder, the growing season much shorter, and the permafrost is continuous, and a more maritime site south of the Alaska Range. All ponds in the study regions in subarctic Alaska showed a reduction in area of between 4 and 31 percent, with ...

New engineered drug may offer prolonged arthritis relief

...sly had investigated the use of ELPs that clump at temperatures higher than normal body temperature for treating cancers. ELPs aren't recognized by the body's immune system as foreign substances, and thus they have some unique advantages for biomedical applications, according to the researchers. Also, ELPs can ...

Microbe fixes nitrogen at a blistering 92 C

...extreme environmental conditions, such as the high temperatures and crushing pressures below the seafloor. If heat...d sand near an Italian beach and fixes nitrogen at temperatures up to 64 C. Nitrogen is necessary for all life because it is an essential part of amino acids and ...

Pesticides need sunscreen to beat the heat

...he SCI. This is becoming increasingly important as temperatures rise, with the Met Office announcing that several heat records were broken in the UK this year. The team of scientists, led by Dr Li-Xiong Wen, has developed a new type of capsule that shields pesticides from UV light. The research, to be published ...

Coral reefs are increasingly vulnerable to angry oceans

...esearchers. For example, episodes of unusually hot temperatures can cause corals' cells to become toxic, or bleached. Another problem is overfishing, which can deplete the fish that eat dead coral and keep the reef clear for the next generation of corals. "Regardless of whether we think of more severe storms ...

Ocean temperature predicts spread of marine species

...tance in warm seas, the effect is more severe when temperatures are below about 59 degrees Fahrenheit (15 degrees ...inning their next development stage because colder temperatures cause sluggish metabolisms....

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