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Tag: "trees" at biology news

Caribbean frogs started with a single, ancient voyage on a raft from South America

...nes and two nuclear genes in their study, building trees of relationships among the species and timing the divergences of the species with molecular-clock methods. "Molecular clocks work by counting the number of DNA-sequence mutations separating two species and then dividing that number by the rate of ch...

The kapok connection -- Study explains rainforest similarities

...acting bats that travel as far as 12 miles between trees and transfer pollen in the process. When the seed ...able to float down rivers along which the colossal trees grow. Dick and colleagues investigated which of several possible scenarios could be the reason fo...

Researchers demonstrate way to control tree height

...es, showing that it’s possible to create miniature trees that look similar to normal trees – but after several years of growth may range anywhere from 50 feet tall to a few inches. This is a...

Scientists close in on missing carbon sink

...esearchers with a much better understanding of how trees and other plants respond to industrial emissions o...rce of 1.8 billion tons of carbon, largely because trees and other plants release carbon into the atmosphere as a result of widespread logging, burning, and ...

Lessons from the orangutans: Upright walking may have begun in the trees

... to chimps, gorillas and humans descended from the trees and began walking on the ground on all fours. ... canopy would have begun to encounter gaps between trees that they could not cross at the canopy level. The Science authors suggest that early human an...

Fuel from fiber -- Pretreatment can put corn stalks, trees in your car's tank

...ng and materials science, making fuels from poplar trees and corn stalks is becoming more efficient and cos...the stems, leaves, stalks and trunks of plants and trees usually discarded as waste after a crop is harvested. He's developed a patented pretreatment process...

Super-fermenting fungus genome sequenced

...ral waste, paper and pulp, wood chips, grasses, or trees such as poplar, recently sequenced by DOE JGI. Under current strategies for generating lignocellulosic ethanol, these forms of biomass require expensive and energy-intensive pretreatment with chemicals and/or heat to loosen up this complex. Enzymes...

Tundra disappearing at rapid rate

Forests of spruce trees and shrubs in parts of northern Canada are taking ...ta indicates is that there was an upslope surge of trees in response to warmer temperatures. It’s like it waited until conditions were just right and then it...

Tropical forests -- Earth's air conditioner

...ss of this strategy depends heavily on where these trees are planted. In particular, tropical forests are very efficient at keeping the Earth at a happy, healthy temperature. The researchers, including Ken Caldeira of Carnegie’s Department of Global Ecology and Govindasamy Bala at Lawrence Livermore Natio...

How trees manage water in arid environments

...ferous forests, where the seasonal behavior of the trees is significantly influenced by temperature changes: the trees are largely dormant in winter and have a summer growing season. The mountain-top forest that she stu...

World's largest flower evolved from family of much tinier blooms

...related to a family that includes poinsettias, the trees that produce natural rubber, castor oil plants, and the tropical root crop cassava. The team from Harvard University, Southern Illinois University, the Smithsonian Institution, and the University of Wisconsin was led by Harvard's Charles C. Davis. ...

Post oak grasshoppers emerging

...nts to know if you've seen them hanging out in oak trees or on your house. They're post oak grasshoppers,...flightless, Behmer said, but they love to climb up trees and houses. "Last year they were in enormous amounts," Junek said, "and mainly on the east side ...

Canada's new government invests $200M in the fight against the mountain pine beetle

...ad of the beetle; recovering economic value from trees killed by the beetles; and protecting communities and forest resources in areas affected by the infestation. Project activities will include measures to control the eastward spread of the beetle in British Columbia and along the British Colu...

The desert is dying

...t of Egypt. In places more than 50% of the mature trees have disappeared between 1965 and 2003, while almost no new trees have been recruited. Despite extreme aridity the main cause of tree mortality seems not to be climat...

Mystery of fossilized trees is solved

...k 385 million years. Upright stumps of fossilised trees were uncovered after a flash flood in Gilboa, upst...wever, until now, no-one has known what the entire trees looked like. Two years ago, two fossils were found near Gilboa of trees which had fallen sideways...

Immunization rates hit record high in poor countries

...o a level that is manageable, allowing some of the trees to make seeds, grow, and survive." It's a pres...ms the hemlock has grown for millennia where other trees wouldn't thrive: a quiet giant soaring to over 150 feet. With a range from Alabama along the Appalac...

Fungal factories may save hemlock forests

...o a level that is manageable, allowing some of the trees to make seeds, grow, and survive." It's a pres...ms the hemlock has grown for millennia where other trees wouldn't thrive: a quiet giant soaring to over 150 feet. With a range from Alabama along the Appalac...

Human preference for other species could determine whether they survive

...ther on weekends to pull invasive English ivy from trees and shrubs on public lands, some homeowners continue to plant the attractive vine in their yards, where it can spread to the wild. "We do have these big differences in how we feel about living things," Stokes said. "These feelings are going to pl...

More species in the tropics because species have been there longer

...n the Americas. Combining analyses of evolutionary trees based on DNA sequences with GIS-based methods for analyzing the effects of climate on species distributions, the researchers found no relationship between how quickly species originate within a group and whether that group is tropical or temperate. ...

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

...tervals between new generations, humans or sequoia trees for example, probably can't adapt nearly as readily. "We humans are relatively lucky that we have technology that can help us to deal with the changes. The flies can adapt very quickly. We don't know if they can keep up with climate change, but th...

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