Tag: "tree" at biology news

Armies of fighting fungi protect chocolate trees

...chers studied endophytes infecting three different tree species, they found that the different species wer... indication that endophyte species were matched to tree species. All these findings hinted that endophytes were not just infecting host trees at random, but...

Science paper: Overharvesting of Brazil nuts leading to fewer trees

...n. For the surveys, the scientists recorded every tree with a trunk diameter of at least 10 centimeters, or about 4 inches. To learn how each stand was harvested, they examined records, interviewed nut gatherers and, in some cases, counted the number of opened or harvested Brazil fruits on the ground. Th...

Traditional Christmas snack under threat

...ht. The scientists surveyed 23 natural Brazil nut tree populations in the Brazilian, Bolivian and Peruvia...ed. Having established the facts about Brazil nut tree populations at these sites, the scientists then ran computer models to predict population trends for...

Satellites spy deaths in rain forests (Clark et al.)

...ndividual canopy trees and detection of individual tree deaths. The ability to locate and follow individual canopy trees from space, they suggest, will usher in a new age of global monitoring of the ecological health of tropical forests world-wide....

American black cherry tree overruns Europe by playing dirty

...d. -- The invasion of Europe by an American cherry tree is helped along by Europeans' own dirt, according ...at makes it possible for the American black cherry tree to have invaded the continent. "We're seeing a definite positive effect of European soil on black ch...

Researchers publish Circumpolar Arctic Vegetation Map

...ioclimate subzone - the region north of the Arctic tree line, with an arctic climate, arctic flora, and tundra vegetation. The map can be viewed on the Web at http://www.geobotany.uaf.edu/cavm/ . The 3-foot by 4-foot, waterproof, tear-proof, field-work-worthy, synthetic-paper map is as beautiful as it is...

USGS December science picks!

..., the mistletoe sends out roots that penetrate the tree and eventually start pirating some of the host tre...Tree, designated in 1926 as the Nation's Christmas tree by President Calvin Coolidge, just keeps getting younger. At one time, biologists estimated that the...

Squirrel invasion sows seeds of change for future forests

...id in the dispersal and germination success of the tree species that we have here in the central hardwoods...n get far enough away from the shade of the parent tree to have a chance of succeeding." The continued regeneration of the central hardwoods forest depends ...

A bird in a tree for biodiversity

...Chicago biologists documents such harm caused to a tree native to Tanzania's East Usambara Mountains where... Henry Howe focused their study on the Leptonychia tree (Leptonychia usambarensis), called the "zonozono" locally in the Swahili language. The tree is endem...

Fruits offer powerful protection from skin cancer

... fruit. Pomegranate fruit extract (PFE), from the tree Punica granatum, contains several polyphenols and anthocyanidins (pigment that gives certain fruits their dark red colors), the antioxidant activity of which is higher than that of red wine and green tea. In this study, researchers evaluated pomegra...

Wolves are rebalancing Yellowstone ecosystem

...here a gully formed an escape barrier for elk, the tree height went up proportionally as the gully deepened and formed an increasing barrier to escape," said William Ripple, a professor with the College of Forestry at OSU. "Where the fear factor of wolves is high, the young trees and willows are doing muc...

New genomic data helps resolve biology's tree of life

...nimals and microbes their respective places on the tree of life. More recently, by comparing DNA sequences..., scientists have been trying to construct a grand tree of life that accurately portrays the course of life on Earth, and shows how all organisms are relate...

Attack of the crazy ants - invasional 'meltdown' on an oceanic island

...t sooty moulds, leading to canopy dieback and even tree deaths. The indirect fallout from the displacement of a native keystone species by an ant invader, itself abetted by introduced mutualists, precipitates invasional 'meltdown' in this island ecosystem. Even in simple systems, unforeseen effects and n...

Canopy raft, canopy crane, canopy bubble, Ikos tree house in Panama

...ees suspended from a helium balloon and perch in a tree house. They will fog with insecticide, shake and ...more 400m2 sites. And finally, a fixed icosohedral tree house will make an additional sample possible. The National Museum of Natural History's Terry Erwin ...

Field Museum gives prestigious Parker Gentry Award to Tanzanian anti-poaching activist

...government to expand the park's boundary below the tree line to incorporate its distinct forest habitat, which had been subject to illegal logging. Largely through his passionate efforts, the park has been transformed into a compelling example of outstanding wilderness management and conservation. "In an...

Using GPR to estimate tree root biomass

...the use of ground-penetrating radar (GPR) to study tree roots nondestructively. They are refining GPR's pr...y and carbon allocation. Estimating the biomass of tree roots traditionally involves using soil cores, pits, and trenches--digging up roots, then sieving, w...

Bacterial relationships revealed

...a demonstrate that constructing a bacterial family tree is indeed possible. Nancy Moran, Emmanuelle Lerat, and Vincent Daubin propose an approach that begins by scouring genomes for a set of genes that serve as reliable indicators of bacterial evolution. This method has important implications for biologis...

Forest preservation work turns to Carolina hemlock

...y find genetic strengths or benefits in Guatemalan tree species, for example, that our trees have gradually lost. Appropriately, by helping other nations protect and conserve their forests, we're helping preserve our own." Working with local scientists and foresters, the NC State researchers collect seeds...

Studies probe rapid evolution of Chinese tallow trees

...772. Franklin, then in Europe, sent Chinese tallow tree seedlings to an associate in Georgia. Known for it...shaped leaves and white fruits, the Chinese tallow tree originated in Asia. The U.S. government brought it to the Houston area around 1900 in hope of using...

Brain links non-food images with eating -- But only when hungry, study suggests

... Gottfried explained. "So, if he sees a particular tree stump, or rocky slope, that predicts clover." As i...ng all its waking hours nosing around a particular tree stump. Humans need a brake system as well, according to Gottfried. "If every time we smelled a grill...

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