Tag: "temperature" at biology news
Computer models forecast sharp increase in temperature if heat-trapping emissions continue to rise
...harts and graphs worldwide projections for average temperature
in 2050 and 2090, and compared the data to the relatively stable temperature
pattern in the 1000 years that preceded the growing presence of greenhouse gasses in the atmosphere....
Methane and mini-horses: Fossils reveal effects of global warming
... off a methane release that would bump the Earth's temperature
up by several degrees---enough to melt polar ice a...uld be difficult to survive. That's what makes the temperature
rises we're measuring now more worrisome than those that occurred in the past."...
New studies reveal connections between oceanographic processes and rockfish populations
...face, showing not only physical conditions such as temperature
and salinity, but also how much phytoplankton (algae and other plant life) and zooplankton (including fish larvae and other small animals) occur at every depth. The new instruments are accurate to within a few inches, provide continuous monitoring, a...
Marine biologists probe 'black box' mysteries of the sea
...ze computers called I-Buttons that record the body temperature
of shoreline organisms every 10 minutes over a two-week period. "The take-home message is that the technology is available to measure these kind of small-scale variabilities," he concluded. "Doing big science on a big scale is important, but if you'r...
New life discovered in deep ocean floor
...ments. When the overlying blanket of water changes temperature
or pressure, hydrates can destabilize and release their cache of methane. When that happens on a small scale, the movement of the sediments can wreck subsea structures like drill rigs or pipelines that carry oil and gas. On a large-scale, hydrate des...
Early Mars: Warm enough to melt water?
...of what it is today, the model returned an average temperature
of minus 13 degrees Fahrenheit." This by itself would not have been enough to allow widespread liquid water. However, the Martian surface could have received 20-30 degrees Fahrenheit additional warming from the greenhouse effect of carbon dioxide ...
Bugs from the deep may be window into the origins of life -- on earth and beyond
...the seafloor. If that pressure were reduced or the temperature
increased, however, the hydrate would likely vaporize, producing large volumes of methane, a potent greenhouse gas. Scientists have proposed that methane hydrates may have had a hand in past climate change episodes, or may be a possible fuel source. ...
Climate affects recent crop yield gains
...The investigation showed that gradual increases in temperature
cause significant decreases in productivity for the two major United States crops, corn and soybean. "We found that climate is a surprisingly important factor in crop yield trends," stated Lobell. Most studies on climate changes and crop production...
Genetically engineered mice offer hope for isolating beta cells and treatment of type 2 diabetes
... pancreas was removed, embedded in optimum cutting temperature
compound and frozen in isopentane at 70C. Serial sections were cut and fixed in four percent paraformaldehyde. GFP fluorescence is well retained under these conditions. The sections were stained with a polyclonal guinea pig anti-porcine insulin antib...
Ground temperature aids in measuring water levels
...of America, describes the methodology behind using temperature
to analyze how much water is recharging the ground...hers have discovered that borehole measurements of temperature
between the surface and the water table aid in measuring how fast water moves to the underlying wate...
Genetically modified crops in India produced greater yields, reduced pesticide use, new study finds
...sed in sub-Saharan Africa or Southeast Asia." The temperature
and humidity of tropical regions produce ripe conditions for insects that munch on crops. Absent the regular use of pesticides, crops in those regions are defenseless against pests. Qaim said the reason China has not seen significant yield gains in ...
Sex, flounder and donuts
...ks. The controlled-breeding method relies on water temperature
manipulation to control sex during the flounder's ...hods could be key to determining the optimal water temperature
to produce fingerling populations with 50:50 female:male sex ratios for restocking efforts, says God...
Sperm use heat sensors to find the egg
...l tract. Sperm cells are apparently guided by this temperature
difference in their navigation. Such a temperature.... In the future, it may be possible to make use of temperature
guidance to improve in vitro fertilization. The research was performed by Ph.D. student Anat Bahat, ...
Male groundhogs hibernate less to visit the ladies
...s. Radio telemetry was used to monitor hourly body temperature
from the groundhogs. A portion of the groundhogs at any one time were implanted with temperature
transmitters. During the first two seasons, straw at the burrow entrances indicated if an animal ha...
Chocolate treats for the heart
...lted chocolate and chill until set. Serve at room temperature
for best flavor and texture. Molten Chocolate Cake Ingredients 7 oz bittersweet chocolate 7 oz butter 7 oz confectioner's sugar 4 eggs 4 egg yolks 1 cups cake flour Pinch salt Directions : In double boiler, melt chocolate, butter and confectione...
Study employs backyard scientists to document global warming impact
... response to a 0.6C increase in the average global temperature
in the last 100 years. The most dramatic impacts, the study notes, are seen in the higher latitudes, which have warmed more than the lower latitudes in the past half-century. "The majority of these changes bear the fingerprint of one factor incre...
Effects of global warming already being felt on plants and animals worldwide
...ons around the world. "Our study shows that recent temperature
change has apparently already had a marked influen... on many species," they wrote, noting that a rapid temperature
rise in combination with other environmental pressures "could easily disrupt the connectedness among...
January GEOLOGY and GSA TODAY media highlights
...warming (an abrupt rise in Northern Hemisphere air temperature
of at least 5 C within a few decades during the last deglaciation), MWP 1a arguably represents the most dramatic event in Earth's climate history during the past 25,000 years, and determining its precise age is of utmost importance for a mechanistic ...
Science's top ten: Discovery of genes' 'control switches' named top advance of 2002
... mouth and skin nerves reacts when exposed to cold temperature
or menthol, triggering the feeling of coolness. The discovery of a heat-sensing channel in skin cells suggested that warmth is sensed first by the skin itself, which then notifies the nervous system. A third channel may produce a different sort of he...
Biologists raising baby loggerhead turtles for conservation find disturbing gender trend
...aid. Such skewed sex ratios can arise because sand temperature
plays a strong role in determining the sex of turt...d be nice if we were looking at a simple system of temperature
determining the sex," said Wyneken. "But even if there are no more surprises, it may be that we are ...
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