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Tag: "warmer" at biology news

Breaks in hibernation help fight bugs

...daptation to combat the germs, when experiencing a warmer winter. However, Salmonella doesn't thrive at very low temperatures, so when animals experience a particularly cold winter, these breaks wouldn't be crucial. But if the animals were exposed to certain pathogens that thrive at low temperatures, li...

Heart has enough oxygen to survive hypothermia, CPR crucial

.... Tveita recalled the recent case of a person in a warmer climate who became hypothermic after being swept out to sea on a cold current. Rats serve as model "In this study, we wanted to find out if there are problems with low blood pressure, low pulse, low cardiac output (the volume of blood the heart...

The vicious cycle of rainforest destruction

...the tropics are rainforest and savanna. As it gets warmer and drier the rainforest gets invaded by savanna, which has fewer trees and holds less carbon in the soil. Savanna also doesn't recycle water in the same way as rainforest, so the carbon loss from the savanna is greater and the atmosphere becomes dri...

Healthy coral reefs of Madagascar resisting damage from climate change

...coast have so far resisted the damaging effects of warmer ocean temperatures attributed to global climate change, say scientists who recently studied the region. The survey of a previously unexplored region in March 2006 by scientists from Conservation International and its partners documented a much great...

Discovery may speed forest biotechnology

...ve about the same even if they are transplanted to warmer regions, the scientists say. For applied research, Strauss said, researchers can now induce activation of the FT gene earlier, so that trees will reproduce at much younger ages ?months instead of years - and better lend themselves to conventional ge...

Taking evolution's temperature: Researchers pinpoint the energy it takes to make a species

... many different life forms seem to converge at the warmer areas of the planet. Writing this week in the Proceedings of the National Academy of Sciences, scientists say higher temperatures near the equator speed up the metabolisms of the inhabitants, fueling genetic changes that actually lead to the creatio...

Medieval diaries aid scientists ascertain increase in hot spots due to global warming

...row tree rings over time - wider rings relating to warmer temperatures. Ice from cores drilled in the Greenland ice sheets revealed which years were warmer than others by the chemical composition of the ice. They also used a record developed from diaries...

Sociality of sweat bees evolved simultaneously during climate change

...at species and populations at low latitudes and in warmer regions are often fully social, whereas they are solitary at higher latitudes and altitudes, which are colder." Warmer regions have longer growing seasons, he explained, which allows two broods to emerge instead of one. The first brood (workers) he...

Climate change drives widespread amphibian extinctions

... on tropical mountains, leading to cooler days and warmer nights, both of which favor the chytrid fungus. The organism grows and reproduces best at temperatures between 63 to 77 degrees Fahrenheit (17 to 25 degrees centigrade). The fungus kills frogs mostly in cool highlands or during winter, implying that...

Extinctions linked to climate change

... give us cause for concern about human health in a warmer world," said Andrew Blaustein, a professor of zoology at OSU, in the Nature article. "As global change is occurring at an unprecedented pace, we should expect many other host taxa, from ants to zebras, to be confronted with similar challenges." Ver...

Study finds evolution doesn't always favor bigger animals

...ger surface to volume ratios are better adapted to warmer environments where they can more effectively dissi...going to look like when everything must adapt to a warmer world? Size correlates with many aspects of the biology of an animal so changes in size are likely t...

Wisconsin scientists discover a master key to microbes' pathogenic lifestyles

...soil molds found around the world encounter a new, warmer environment. And as soon as they do, they rapidly shift gears and assume the guise of pathogenic yeast, causing such serious and sometimes deadly afflictions as blastomycosis and histoplasmosis. But how these usually bucolic fungi undergo such a tra...

Scientist measures role of science's coolest player: The snow

...e snow melted away? Obviously, it would be a much warmer place. But what's interesting is how much warmer, says Stephen Vavrus, an associate scientist at the Center for Climatic Research at the University of Wisconsin-Madison. Working with computer-generated simulations, Vavrus found that in the absence of...

Microbes under Greenland Ice may be preview of what scientists find under Mars' surface

...s about 10 degrees Celsius (18 degrees Fahrenheit) warmer than that found at the base of the Greenland ice s...t - underground, where the temperature is slightly warmer than freezing and such microbes should average about one every cubic centimeter, or about 16 per cub...

Oil spills and climate change double the mortality rate of British seabirds

...Ecology Letters also shows a direct link between a warmer climate in the North Atlantic and a higher mortality rate among British guillemots. Professor Birkhead's long-term guillemot study has been carried out on Skomer Island, Wales, since 1972. The length of the ongoing study has allowed the research ...

GM crop that holds on to its seeds offers higher yields

...eds could yield crops that are well suited for the warmer climates of most developing countries. Link to abstract of paper in Plant Biotechnology Journal Reference: Plant Biotechnology Journal doi: 10.1111/j.1467-7652.2005.00156.x (2005) ...

Picky female frogs drive evolution of new species in less than 8,000 years

...than 8,000 years ago as the climate got wetter and warmer and the rainforest expanded. Hoskin and his colleagues found that the northern and southern calls of the male frog, which are what females pay attention to in the mating game, had become different from each other. Yet despite this difference, reflec...

Study uncovers dirty little secret: Soil emissions are much-bigger-than-expected component of air pollution

...sphere spike during the growing season, spurred by warmer temperatures after a cold winter, but also perhaps magnified by fertilizer use. "The soil emissions were much larger than we expected," she said. "The biggest areas were the dry topical regions like the Sahel, and in the mid-latitude regions where t...

Lands surface change on Alaska tundra creating longer, warmer summers in Arctic

...th of shrubs and trees, may be creating a cycle of warmer and longer summers in the Alaskan Arctic according to a new study to be published in the Sept. 22, 2005, issue of Science Express. The resulting atmospheric heating in the region of northern Alaska is equivalent to what might be observed if there wa...

Envisat and ERS-2 reveal hidden side of Hurricane Rita

...s because anomalies in SSH can be used to identify warmer ocean features such as warm core rings, eddies and currents. The US National Oceanic and Atmospheric Administration (NOAA) is utilising Envisat RA-2 results along with those from other space-borne altimeters to chart such regions of 'tropical cyclo...

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