Tag: "tree" at biology news
Seeing the trees for the forest: WHRC scientists creating National Biomass and Carbon Dataset
...rsion process by providing land use/land cover and tree
cover data sets. In this context Dr. Kellndorfer states, "This project depends on the confluence of these national datasets, and the development of a complex set of models, each of which has its own accuracy characteristic. We are keen to see new gl...
Fire fighters, managers use new software to estimate fire hazard; air pollution levels
...w it is distributed on the forest floor and in the tree
canopy and understory, and the potential behavior of a fire once it ignites. And there are other applications. "Not all fires are created equal; different fuels produce different amounts of smoke," says Don McKenzie, a research ecologist and devel...
Video analysis adds evidence for ivory-billed woodpecker
...eo, a large bird partially peeks out from behind a tree
trunk, showing a portion of its white wing. Resear...ed a stuffed ivory-billed woodpecker on the actual tree
where the video was shot to show that the white corresponds to the white outer wing of the perched b...
Self-assembled DNA buckyballs for drug delivery
...oup created molecules with several arms, a sort of tree
shape (dendri- means tree
in Greek). Then they attached polystyrene molecules to the dendrimerlike DNA forming a hybrid molecu...
Emerald Spectre haunts Ontario's ash forests
... a little human help. Adult beetles lay eggs under tree
bark and the feeding larvae kill trees by disrupti...tch elm disease, which wiped-out a dominant forest tree
species from eastern North America." Dr. MacIsaac's paper on the beetle will be published in a forth...
Birds and bats sow tropical seeds
...ed trees and will be far less likely to accumulate tree
species from nearby forests. "In the tropics, thin...to surrounding landscapes." Over the coming years, tree
growth in adjacent forest remnants will be studied. Howe suspects that evidence will support the hyp...
Quick identification needed to save Florida's citrus industry from devastating disease
...tle and leaf yellowing that spreads throughout the tree
with lopsided fruit that fail to color properly. Citrus greening has seriously affected citrus production in Asia, Africa, the Indian subcontinent and the Arabian Peninsula, and was recently discovered in Brazil....
APS physics tip sheet #53
...ardo da Vinci observed that "all the branches of a tree
at every stage of its height when put together are equal in thickness to the trunk." Now, researchers have observed similar regularities in lung airway trees in four different mammal species. They find that at any level of branching, the ratios of th...
Ants, not evil spirits, create devil's gardens in the Amazon rainforest, study finds
...irsuta plants. Two saplings of a common Amazonian tree
called Cedrela odorata , or Spanish cedar, were p...inside each garden near the base of a D. hirsuta tree
actively patrolled by worker ants. A sticky insect barrier was applied to one cedar sapling to excl...
NASA technology monitors wildlife habitats from the air
...rest's tallest trees. They also get information on tree
height and biomass, the amount of living material ...an important role in its ecosystem by distributing tree
and other plant seeds, live in mature pine and hardwood forests, especially near farmland. Large tre...
Coming to the Arctic near you: The longer, hotter summer
...nes. "Continuation of current trends in shrub and tree
expansion could further amplify this atmospheric heating 2-7 times," Chapin said. "This mechanism should be incorporated into climate models," Chapin said. Improved understanding of the controls over rates of shrub expansion would reduce the likeli...
Photos reveal first tool usage in wild gorillas
...hen retrieved a straight branch from a nearby dead tree
and used it to test the depth of the water. Keeping her upper body above water, she moved some 10 meters out into the pool before returning to shore and her wailing infant. Then another female gorilla named Efi used a detached trunk to suppor...
Defeating the 'superpests'
..., a chemical derived originally from the sassafras tree
and used for many years in laboratories to enhance the effectiveness of other chemicals. The PBO binds to the enzyme that would otherwise break down the pesticide. However, the key with this research has been to work out the correct time delay betwee...
NSF awards 19 new projects to better undestand genetic processes in plants of economic importance
...oping and using genomic tools to better understand tree
metabolism and development. Researchers at the Uni...lly pine, potentially developing new resources for tree
breeding. higan Technological University investigates the metabolic pathways leading to synthesis o...
Same-sex mating by fungi spawned infection outbreak, evidence suggests
... years ago and another collected from a Eucalyptus tree
in San Francisco in 1992. What's more, the Canadian strains shared approximately half of their genetic makeup, suggesting that the two might be related. Further analysis confirmed this initial finding, suggesting that the two C. gattii strains in Van...
Underlying cause of massive pinyon pine die-off revealed
...at a nearby site. In 1992, the team began tracking tree
mortality. "I could see the plot from my office wi...er woodlands in 2002 and 2003 revealed significant tree
die-off covering more than 4,600 square miles (12,000 square km). The effect was so dramatic it coul...
...he past thousand years or so by the delicate ivory tree
coral Oculina varicosa, and include a series of spectacular pinnacles, mounds, and ridges that can grow up to100 feet high. Deepwater Oculina reefs are not known to exist anywhere else on the planet besides off Florida. Fishing for shrimp and scallo...
Newly discovered birdlike dinosaur is oldest raptor ever found in South America
...ngoing project to assemble the evolutionary family tree
of dinosaurs (including birds), and their relatives, by a team of scientists that includes Makovicky and is funded by the National Science Foundation. Remarkably different dinosaur Buitreraptor (bwee-tree-rap-tor) is about the size of a very lar...
Hormone might cause dangerous pregnancy complication
...kin of a poisonous frog and the bark of an African tree
once used to make poison arrows," said Dr. Lingrel, "and they all worked on the sodium pump binding site."It turns out that almost all species, from fruit flies to humans, have a site that responds to these medications. The question is, did nature so...
Logging doubles threat to the Amazon, rivaling clear-cutting, study suggests
...his type of deforestation, only certain marketable tree
species are cut and logs are transported offsite t...s can pull down large amounts of vegetation when a tree
falls. The forest also becomes drier and more flammable, as the shady canopy is thinned. "Logged for...
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