Tag: "oak" at biology news

Plant stems and leaves are always proportional to roots

...es differing radically in overall size (from giant oak trees to some of the smallest flowering plants such as mouse-ear cress) and found that the proportions of leaf, stem, and root biomass remain, on average, constant....

Fighting the spread of sudden oak death

...top the spread of an exotic fungus that is killing oak trees in northern California, a University of Rhod...study the newly-discovered pathogen called sudden oak death -- to better understand how it works. Larry Englander, URI associate professor of plant patho...

Traditional floodplain forest restoration may decrease bird diversity

...n oaks. "Forest restored byplanting of only common oak species may not be adequate for restorationof a diverse avian community," say Gabbe and his colleagues. Theyrecommend also replanting floodplain forests with the heavy-seeded andrare trees that many birds prefer. The researchers point out that restor...

Planning could preserve urban forests for future enjoyment

...lack cherry, white ash, black birch, sweet gum and oak than were found during the 1930s. Some New York forests had greater density of tulip, hickory, beech, red maple and black locust while others had decreased density of these species. Only flowering dogwood and hemlock decreased overall since the 193...

Warming temperatures may freeze North American timber industry

... Europe typically produce hardwoods such ascherry, oak and maple. But warming temperatures will allowsoftwood species, primarily southern pine, to slowly migrate northand eventually take over the hardwood forests. The research appears in a recent issue of the Journal ofAgricultural and Resource Economics...

Doubt cast on theory of tropical forest diversity

...species -- red maple, birch, ash, tulip poplar and oak -- as they progressed through germination to older seedlings. The scientists confirmed that the mortality at each stage depended on how many adult trees of that species were clustered nearby -- demonstrating that density-dependent mortality was at wo...

Genetic diversity necessary for optimal ecosystem functioning, according to UGA research

...on Foundation. The study was conducted on a turkey oak (Quercus laevis Walter) sandhills community at UGA's Savannah River Ecology Laboratory in Aiken, SC where Madritch and Hunter analyzed the decomposition of nine different single tree litter treatments and one mixed treatment that contained litter fro...

Rogue trees get criminal treatment from scientists.

...rea. It's easy to tell the difference between an oak tree root and chestnut tree root, for example. It's when you are faced with trees of the same kind in the same vicinity that the scientists have to step in." Dr Wolff, Reader in Evolutionary Genetics at Newcastle University's School of Biology, and f...

JGI to decode DNA of destructive plant pathogen

...ra is a fungus-like microbe responsible for sudden oak death syndrome, soybean root rot, and a wide varie...recently identified microbe responsible for sudden oak death, and P. sojae, which causes soybean root rot, resemble fungi but are actually Stramenopiles, a...

Virginia Bioinformatics Institute to decode plant devourer genomes

...ath Syndrome that is destroying California's coast oak ecosystems. It also threatens redwood and Douglas fir forests on the West coast, and red and pin oak forests in the East. Tyler's research group will provide a genetic map of the P. sojae genome that ...

Outbreak of native oak borers threatens Ozark forests

...searchers confirm an unprecedented outbreak of red oak borers in the upland hardwood forests of the Ozark...ansas at Fayetteville, and other agencies. The red oak borer, an inch-long beetle native to forests in the eastern United States, causes most of its damage...

Stung by success: Intensive farming may suppress pollinating bees

...watermelon farms located at varying distances from oak woodlands and chaparral habitats that are native to the Sacramento Valley. They also looked at land that was farmed conventionally (with pesticides) and organically (without pesticides). They focused on watermelon because it requires a lot of pollen ...

Catnip stops termites dead in their tracks

...eved to infest about 30 percent of the area's live oak trees and costs home owners more than $300 million a year. "One of the aims of looking at natural products is to find something that is less toxic to humans and less toxic to the environment as well," said Chris Peterson, Ph.D., a research entomologi...

Ecosystem engineers

...caterpillars had on the entire community living on oak saplings. In Missouri alone, over forty species of caterpillars make their homes on oaks. The insects create a shelter by rolling, folding, or tying leaves together with silk or creating a silk tent that provides protection. The caterpillar Pseudot...

New desert research and education center established

...ontain the coniferous forests of MountPalomar, the oak woodlands of the Cuyamacas and the lower ColoradoRiver," said the institute's new executive director, Marty Eberhardt,formerly executive director of the Tucson Botanical Gardens. "Our vision is to expand the ways that people can learn about andenjoy ...

Plant pathologists to discuss deadly oak diseases

St. Paul, MN (June 25, 2003) The revered oak species has been a collective favorite for thousan...d tree. Reports of local and regional episodes of oak mortality, outbreaks of new pathogens, and the expansion of known pathogens into new areas appear to...

Plant genes imported from unrelated species more often than previously thought, IU biologists find

...of organisms that counts among its members humans, oak trees, kelp and mushrooms -- throughout the group's 2 billion year history. But a new Indiana University Bloomington study in this week's Nature suggests that such genetic events, called horizontal gene transfers, have happened more often than previo...

Cross-species mating may be evolutionarily important and lead to rapid change, say IUB researchers

..., such as offspring of the notoriously promiscuous oak tree species, which hybridize so often species-namers commonly joke about not being able to keep up. Still, cross-species matings usually result in sickness or sterility, if the offspring get that far -- many naturally abort. Hybrid offspring that ar...

Plant pathologists meeting in Charlotte, NC to discuss homeland security, emerging diseases

...umber of reports of local and regional episodes of oak mortality, outbreaks of new pathogens affecting the oak species, and the expansion of diseases, such as Sudden Oak Death, into new areas will be the focus o...

Fire on French Riviera

...re under control since it first began in the thick oak and cork oak trees covering the Maures hills last Sunday. At the height of the fire, several campsites had to be ...

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