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Tag: "spring" at biology news

Growth in the sea comes down to a struggle for iron

...acific," says Wells. "The North Atlantic has a big spring bloom, just like we have on our coast, but these other areas have a persistent excess of nutrients because phytoplankton growth is reduced." Many scientists from around the world are now studying iron effects in these regions. Though scientific effo...

Sea skate experiment sheds light on human cell transport

...and Musch learned how cellular channels, or gates, spring into action when skate red blood cells become engorged with water. Vesicles, or tiny fluid-filled sacs, carry these gates up to the cell membrane. The vesicles are inserted into the membrane and a chemical process known as phosphorylation takes place...

Poplar trees redirect resources in response to simulated attack

... storage so it will be available to help the plant spring back to life once the attack has passed. Using the techniques developed at Brookhaven, we now have a way to find out." To simulate an insect attack, the scientists painted a solution of jasmonic acid, a chemical messenger that plants produce in resp...

Scientists discuss improved biopesticides for locust control in West Africa

...o not breed in the dry season, but when the annual spring rains begin, they are expected to return. Participants at the seminar included ministers of agriculture from other West African nations, national plant protection directors and locust control personnel, military officers in charge of locust control ...

Dead zone area in Gulf could be increasing, researchers say

...ulf. The dead zone area typically develops in late spring and early summer following the spring flood stage of the rivers, which bring large amounts of nutrients ?often in the form of fertilizer ?...

No relief for Pacific Northwest drought

...oes not appear there will be any major relief this spring or summer from the unusually dry weather that has ... The latest consensus forecast for fire risk this spring and summer indicate huge forest and rangeland fire outbreaks in northeastern Oregon and southeastern...

Microbial forensics: The next great forensic challenge

...microbial forensics, there was a meeting this past spring sponsored by DHS, with the results reported to the White House. The FBI-led Scientific Working Group on Microbial Genetics and Forensics has identified gaps requiring investments for research, development, and validation. Input from the scientific c...

NASA study finds snow melt causes large ocean plant blooms

...ASA funded study has found a decline in winter and spring snow cover over Southwest Asia and the Himalayan m...s in this week's SCIENCE magazine When winter and spring snow cover is low over Eurasia, the amount of solar energy reflected back into the atmosphere is les...

Shift of weather patterns necessitates rethinking of reforestation methods

...ing seedlings that have been left behind." As for spring plantings, both bare root and containerized seedli...ndowners are often to advised to over-plant in the spring because of the likelihood of low survivability. With containerized seedlings, the survival rate is h...

Scientists journey to southern Africa to unravel the secret world of elephant communication

...ers set up camp at Mushara waterhole--a freshwater spring where elephants, giraffes, lions and many other species gather day and night to drink or bathe during the dry Namibian summer. To avoid disturbing this remarkable parade of wildlife, and to prevent one of these large creatures from invading tents or...

The evolutionary triumph of flower power

Enjoying spring flowers? Flowers have flourished ?their beauty evolving over time ?simply because we like them, says Terry McGuire, associate professor of genetics at Rutgers and co-author of a paper that examines for the first time the whys and wherefores of flower...

Africa to take it on chin again with climate change

...esent the findings on May 24 in New Orleans at the spring meeting of the American Geophysical Union. The study, conducted with Martin Hoerling (National Oceanic and Atmospheric Administration), was supported by NOAA and the National Science Foundation, NCAR's primary sponsor. The analysis, which draws on 6...

Road salt affects mitigation wetlands

...he salt levels will again fall back to zero in mid spring this year as Erie had its last snowfall on May 2 and had a three-foot snowfall in late April. "PennDOT is between a rock and a hard place," says Silver. "Everyone knows that the salt is not good for the environment, but salting roads is a huge safet...

Gladstone investigators discover how resting T cells avoid HIV infection

...cific antigen. When they detect its presence, they spring into action -- growing and dividing, releasing cytokines (proteins that the immune system uses to communicate between cells) and recruiting and activating additional T cells. The new study shows that this activation process dismantles the highly effe...

Roundup®highly lethal to amphibians, finds University of Pittsburgh researcher

...poles were nearly eliminated. One species of frog, spring peepers, was unaffected. "The most shocking insight coming out of this was that Roundup®, something designed to kill plants, was extremely lethal to amphibians," said Relyea, who conducted the research at Pitt's Pymatuning Laboratory of Ecology. "We...

Ocean climate predicts elk population in Canadian Rockies

...pulation in Banff National Park was published this spring in the Journal of Animal Ecology. ...

Wild grasses and man-made wheats advance research capabilities

...nt and early growth in the fall." These synthetic spring wheat varieties must be backcrossed to make them winter wheats, he said. Then they can be looked at for other characteristics. "If we find something useful in the wild, we may make a synthetic hexaploid from it, or directly cross into wheat," Rudd sa...

Gifts from the sea

...id arrive by the tens of thousands. It's a sign of spring to the fishermen who make a living in this important New England fishery. But here at the Marine Biological Laboratory (MBL), it triggers an influx of hundreds of scientists and students from around the world, who return here faithfully every summer ...

Why are coyotes getting more aggressive?

...ese areas of natural cover is normal." During the spring and early summer, coyote sightings in both rural and developed areas are likely to be more frequent because the animals are raising their litters and require more food. To minimize contact, the DEC recommends: # Never feed or attempt to get close to...

Overbearing colored light may reveal a second mechanism by which birds interpret magnetic signals

...ut they no longer show the seasonal change between spring and autumn and instead head north in both seasons. This behavior did not appear to involve the normal inclination-compass and chemical-compass mechanisms. The new findings show that bright-colored light interferes with magnetoreception such that mig...

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