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Tag: "north" at biology news

Salty oceans provide early warning for climate change

...ure gradient in the ocean that sends energy to the north without water actually being transported,” explains Zahn. Regardless of whether ocean circulation speeds up or slows down it causes significant climate change, altering the hydrological cycle and affecting atmospheric circulation patterns too. ...

Scientists close in on missing carbon sink

...ls were overestimating the amount of uptake in the north and underestimating uptake in the tropics," says Kevin Gurney of Purdue University, a co-author of the paper and coordinator of the TransCom study. "To figure out exactly what is happening, we need improved models and more atmospheric observations."...

Ice Age extinction claimed highly carnivorous Alaskan wolves

...hly carnivorous form of wolf that lived in Alaska, north of the ice sheets. Wolves were generally thought to have survived the end-Pleistocene extinction relatively unscathed. But this previously unrecognized type of wolf appears to have vanished without a trace some 12,000 years ago. The study, which...

Diminishing dinosaur steps saved by laser and laptop

... just 15 minutes. The quarry, which lies to the north of Barcelona, was still active until fairly recently, but there are now plans to make it a protected site of special scientific interest. Dr Manning was part of the UNESCO team who initially evaluated the trackway localities in Northern Spain, as ...

Discovery of new cave millipedes casts light on Arizona cave ecology

...rm) to the females during reproduction. For the north rim species, Voyles explained that the discovery will result in the two caves becoming listed as 'significant' under the Federal Cave Resource Protection Act of 1988. Voyles indicates there are a lot more exciting discoveries to be made. "With 170...

Childhood obesity among Quebec Cree raises concerns

...olchildren aged 9 to 12 living in two Cree Nations north of Montreal, Canada. The researchers measured height, body mass, waist circumference and skinfold thickness, and also assessed the children’s levels of physical activity and physical fitness. The results from one community, published in the Internati...

'Terror bird' arrived in North America before land bridge, study finds

... analyzed six specimens from the Santa Fe River in north Central Florida. "We found that the Titanis fossils were 2 million years old and not 10,000 years old as had been suggested," MacFadden said. "This also shows the last known occurrence of Titanis in the fossil record and reflects its extinction." ...

CSIRO imagery shows Outer Great Barrier Reef at risk from river plumes

...ume movement in the mid to northern GBR usually go north and never directly flow to the outer reef is spared the direct effects of such river floods. "A re-think is needed now that we know where flood plumes go," says CSIRO scientist Arnold Dekker, "and what this means as organic micropollutants may ...

Invasive ants territorial when neighbors are not kin

...around one of the smaller colonies, at Lake Hodges north of San Diego, killed at least 15 million workers over the six month study. However, ants did not fight when placed with ants from a distant location in the same supercolony. Coauthors Christine Payne-Makrisâ and Andrew Suarez from the University o...

Evolution of Old World fruit flies on three continents mirrors climate change

...sect was found. Inversions that were common in the north were uncommon in the south, and vice versa. The fruit flies were accidentally introduced to the Pacific Coast of Chile in the late 1970s and to the North American West Coast in the early 1980s, probably on cargo ships. They spread rapidly, and in ...

Edible coatings will be the packaging of the future

...ide that grows in dry and semi-arid regions of the north of Mexico. The result is a compound film that is resistant and that maintains suitable mechanical properties. The use of mesquite gum is an economical and efficacious alternative with a promising future, not only for food conservation, but it could a...

Telemedicine robots help improve health

...ots which will be deployed in selected central and north Queensland hospitals, as well as employment of a Senior Research Officer to manage the project at the Centre for Online Health. Senior Research Fellow Dr Anthony Smith said the new robots would enable the Centre to build on the successful trial c...

Shrinking ponds signal warmer, dryer Alaska

...re than 5 million square kilometers bounded on the north by the Brooks Range and on the south by the Alaska Range. To contrast the semi-arid, subarctic sites of discontinuous permafrost in Interior Alaska, the authors also selected a study area in the Arctic Coastal Plain where the temperatures are much co...

Tamed 11,400 years ago, figs were likely first domesticated crop

...a village in the Lower Jordan Valley, just 8 miles north of ancient Jericho, known to have been inhabited for some 200 years before being abandoned roughly 11,200 years ago. The carbonized figs were not distorted, suggesting that they may have been dried for human consumption. Similar fig drupelets were fo...

Important gene controlling tree growth and development found

...nds with growth cessation and bud set. The further north the trees grow the more important it is to stop gr...from different latitudes (different origins in the north to south direction, so called "provenances", display different critical daylengths. For instance, an...

More than drought affecting wheat yields

...f by producers, Allen said. They came from as far north as Nebraska and as far south as Dallas and the Hill Country, Rush said, making this one of the most widespread years for wheat streak mosaic damage. "Without question, wheat streak mosaic virus is the No. 1 pathogen of wheat year in and year out,"...

Mussels evolve quickly to defend against invasive crabs

...ign of Freeman's study, Hemigrapsus is not present north of mid-coast Maine. "This set up a chance to look at populations that had been exposed to the predators for varying lengths of time," says Freeman. "We wanted to know, how is it that these mollusks can recognize a crab that is historically not pres...

First surveys of Tanzanian mountains reveal 160+ animal species, including new & endemic

...Arc Mountain range in eastern Tanzania and located north of the city of Morogoro. Its forests are often covered in a blanket of mist during the night and help collect water for two nearby rivers which in turn provide water for several settlements and a town. As a crucial source of water and home to unique ...

Creating a window on 'oceans in motion'

... 1,750 km, from Oregon through British Columbia to north of the Alaskan panhandle. POST has revealed the Pacific migration routes of young wild salmon from US and Canadian rivers. Knowing their usual travels along marine highways has far-reaching implications for authorities that need to determine when ...

Marine 'dead zone' off Oregon is spreading

... dead crabs in pots at depths of about 45-90 feet, north of the Moclips River. Large numbers of dead Dungeness crab have been reported on the beach as far north as Kalaloch. Numerous species of bottom fish have been found dead on the beach south of the Quinault...

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