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Tag: "pond" at biology news

Virtual duck bills demonstrate species coexistence

...jections on the bill, to sieve food particles from pond water. Many ecologists, including Darwin, suggested that ducks coexist because interspecific differences in the spacing of bill lamellae allow each species to consume food particles of different sizes. Research published in the March issue of the Ame...

Hopkins researchers discover how brain protein might control memory

..., they went on a molecular fishing expedition in a pond filled with other proteins normally found in the brain and hooked two known to be involved in transporting materials into and out of cells. "Moving things in and out of cells is critical for normal brain cell function. We were extremely excited th...

Shrinking ponds signal warmer, dryer Alaska

...at satellite from 1999-2002, Riordan outlined each pond by hand. "With automated classification your accuracy goes down," Riordan said. Cloud shadows can look like water and Alaska rarely experiences a cloudless day, said Verbyla. The most difficult part of the four-year project, said Riordan, was "havi...

Paramecia adapt their swimming to changing gravitational force

...tures respond. The researchers placed a vial with pond water and live paramecia inside a high-powered electromagnet at the National High Magnetic Field Laboratory in Tallahassee, Fla. The organisms are less susceptible to a magnetic field than plain water is, so the magnetic field generated inside the vi...

Dragonfly's metabolic disease provides clues about human obesity

...successful mating requires intense competition for pond territory, aerial contests, and high-performance flight. "These guys are the jet fighters of the insect world," said Marden. Flight muscle makes up 60 percent of their body mass. The large variation in muscle output was intriguing because natural ...

Researchers reveal mystery of bacterial magnetism

...etospirillum magneticum, was originally found in a pond in Tokyo, Japan. Magnetic bacteria typically live far below the surface, where oxygen is scarce. (They do not grow well where oxygen is plentiful.) What makes them fascinating is that they naturally grow strings of microscopic magnetic particles c...

Pretreating rogue cancer cells with aspirin cripples their resistance to targeted therapy

...ey Pines in California, a cave in West Virginia, a pond in Mississippi, and six sites in Hawaii. The whooping crane and the recently rediscovered ivory-billed woodpecker are two spectacular American species that qualify for inclusion. Particular concentrations of sites are also found in the Andes of South...

New study pinpoints epicenters of Earth's imminent extinctions

...ey Pines in California, a cave in West Virginia, a pond in Mississippi, and six sites in Hawaii. The whooping crane and the recently rediscovered ivory-billed woodpecker are two spectacular American species that qualify for inclusion. Particular concentrations of sites are also found in the Andes of South...

Disappearing arctic lakes linked to climate change

...la near Council, Alaska and found that the surface pond area there had decreased over the last 50 years. In this latest study, comparing data from 1973 with findings from 1997-98, the total number of large lakes decreased by around 11 percent. While many did not disappear completely they shrank significa...

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

...ide, actually increased the amount of algae in the pond because it killed most of the frogs. "It's like killing all the cows in a field and seeing that the field has more grass in it--not because you made the grass grow better, but because you killed everything that eats grass," he said. Previous resear...

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