Tag: "northern" at biology news

Pollen record from Chilean lakes indicates global "togetherness" during last ice age

...r did the climate change in a see-saw pattern with northern ice sheets driving climate change later in the sou...nt glacier lobes 14,600 years ago at the same time northern ice sheets were retreating. Our results suggest that mid-latitude climate in the Southern Hemisphere...

Humans at work and play in high altitude environments

...Cal Tech astronomers who work above 16,000 feet in northern Chile. This technique, in which the oxygen concentration of the rooms and laboratories is enriched with additional oxygen, is based on studies first conducted at the White Mountain Research Station by West, who is a UCSD professor of medicine and phy...

Organgutan numbers plummeting worldwide; species may vanish in ten years, study says

...s throughout their range. The Leuser Ecosystem in northern Sumatra, Indonesia, which supported 12,000 orangutans in 1993 -- the largest population in the world -- lost nearly half its animals over a seven year period. In 1998 and 1999, losses occurred at around 1,000 animals per year. "The alarming declin...

Museum dinosaur labs draw international researchers

...ll of an Allosaurus fragilis excavated in 1991 in northern Wyoming. Uncrushed and almost one meter long, it was ideal for her research. "The way Jack and Celeste helped with this work was by providing access to the skull of Big Al," Rayfield said. "More importantly, they arranged for the skull to be CT sca...

Elephants pick up good vibrations - through their feet

.... "There`s anecdotal evidence that culling in the northern end of Kruger National Park causes nervousness among elephants in the southern end many miles away," she says. "Helicopter noise is traumatic, so perhaps these animals are picking up low-frequency signals from the rotating blades or from the distress...

Major fossil find reveals Asian origins of salamanders

...y, 65 million years ago." A volcanic eruption in northern China during the Late Jurassic, 150 million years ago, provided key material for the origin of the salamander--85 million year earlier than the previous fossil record. The eruption wiped out whole communities of the earliest known salamanders but lef...

Coastal research project at UC Santa Cruz receives major boost in funding

...e responsible for all of PISCO's field research in northern and central California, as well as some of the research in southern California. UCSC's portion of the original five-year grant was $3.2 million, and the augmentation brings the campus to the same level of funding as the other partner institutions. "...

Blood markers associated with autism and mental retardation

...neonatal blood samples from children, born in four northern California counties from 1983 to 1985, who later developed autism, mental retardation, cerebral palsy, or developed normally. The investigators measured concentrations of several neural growth factors and found that the growth factors were significa...

New finding accelerates discovery of disease genes and human population history

...und that single nucleotide polymorphisms (SNPs) in northern Europeansthe single letter DNA differences that un...the occurrence of SNPs in large blocks was seen in northern European populations but not seen in the Nigerian populations, suggesting that something happened in...

Collapse of simple life forms linked to mass extinction 200 million years ago

...Samples from a spot called Kennecott Point, in the northern Queen Charlottes, and from Kunga Island, about 100 miles to the southeast, showed a sharp decline in the presence of organic carbon, even at places where levels of inorganic carbon rose. The organic carbon decline correlated with the decline of radio...

Proteins in African HIV strains interact differently with drugs

...a to recreate the proteins. HIV-A dominates in the northern part of Sub-Saharan Africa, while HIV-C is prevalent in southern regions. Freire's lab measured the proteases' efficiency and biochemical fitness through factors related to catalysis, a chemical term for a process where one substance (the protease) a...

Male and female songbirds show big learning differences

Female northern cardinals learn songs in one-third the time it takes male birds to learn the same number of songs, according to research at the University of California, Davis, by Ayako Yamaguchi, a former graduate student. "It's the largest learning difference bet...

Soil fertility limits forests capacity to absorb excess CO2.

... are not available?" That is the case for many northern mid-latitude forests, which comprise much land in the United States and Europe, Ellsworth noted. Forest soils tends to be low in nutrients because most of the nutrient-rich soil has been used for agriculture. "The debate over how much CO2 trees wi...

Field Museum plays vital role in creation of huge new park

...I documented the extraordinary biodiversity of the northern Cordillera Azul mountain range, where the new park is located. The Parque Nacional Cordillera Azul sits in one of the last large tracts of virgin rainforest still undeveloped and largely uninhabited. As such, its creation represents a great victory f...

Scientists using earstones to identify red drum nursery grounds

...aid. For example, red drum growing up along Texas' northern coast may not mix with fish from the south. If thi... he said, then fishery officials may need to stock northern areas only with fish from that portion of the coast. Rooker said he also will compare fish originati...

Whales drawn to waters off Mississippi River Delta

...ooks at the natural history of sperm whales in the northern Gulf of Mexico. However, Davis said the study's findings would likely be of interest to the Marine Mammal Commission, National Marine Fisheries Service as well as the Minerals Management Service, which oversees development of offshore oil and gas dep...

AIDS in Africa has potential to affect human evolution, UC Berkeley scientists report

...ion, called delta-32, in the CCR5 gene is found in northern Europeans, though rarely in Africans. A person wit... Slatkin said that it appears the CCR5 mutation in northern Europe has been selected for in the past 700 years, possibly by another epidemic disease with as str...

Marine snail study suggests conservation efforts should move beyond genetic diversity

... highest in the Los Angeles area and lowest in the northern part of its range. "This novel study provides...gy-in the shape and size of the shells-between the northern and the southern populations," says Kaustuv Roy, a biologist at UCSD who conducted the study with Mi...

Evolution at a snail's pace: It's faster than you think

...ages pushed the Acanthinucela spirata species from northern California into the southern part of the state, wh... place within the species. When conditions in the northern part of the state eventually warmed some 10,000 to 14,000 years ago some members of the snail spec...

Scientists record extraordinary sounds made by minke whales

...ales that congregates from May to September on the northern part of Australia's Great Barrier Reef. These whales are unusually curious; when the Undersea Explorer stopped near them, they would approach to within a few yards and circle the boat and snorkeling observers for hours on end. "There are other curio...

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