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Tag: "tree" at biology news

Ancient DNA confirms single origin of Malagasy primates

...cus and Megaladapis. The first has been likened to tree sloths and the second compared to koala bears. Both ranged in body weights from 100 to 150 pounds, as compared to the largest living lemur, Indri indri, which weighs in at fewer than 15 to 17 pounds. "The most important conclusion to be drawn from o...

New technique could alter field of mouse genetics

...c can also be removed from its place in the family tree by breeding a mouse with another that carries the enzyme necessary to excise the jumping gene. "We do not know why the P element did not work in mammalian organisms, and we do not know why this particular one works," Xu said, "but this system is a d...

Long-sought flower-inducing molecule found

...that can also lead to the development of efficient tree breeding for forestry". ...

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. ...

Birds and bats sow tropical seeds

...ed trees and will be far less likely to accumulate tree species from nearby forests. "In the tropics, thi...o surrounding landscapes." Over the coming years, tree growth in adjacent forest remnants will be studied. Howe suspects that evidence will support the hyp...

DNA traces evolution of extinct sabertooths and the American cheetah-like cat

...d this week, researchers created an updated family tree for the ancient cats by comparing ancient DNA extr...ted to any living felid species. The phylogenetic tree drawn from the new data also shows that the American cheetah-like cat is genetically most closely re...

New book expands biological classifications to account for 'alien' life

...y it. Otherwise you wouldn't have dinosaurs on the tree of life. And until now there hasn't been any place to put RNA life." In the current popular classification system the highest levels are three domains ?bacteria, archaea and eukarya, the last of which includes all animals. Ward's plan places those t...

Picky female frogs drive evolution of new species in less than 8,000 years

...e after two isolated populations of the green-eyed tree frog reestablished contact less than 8,000 years a...gs in the Oct. 27 issue of Nature. The green-eyed tree frog, Litoria genimaculata, lives in the Wet Tropics area of northeast Queensland, a rugged tropical...

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 fort...

Study shows big game hunters, not climate change, killed off sloths

...r example, we might want to consider taking living tree sloths and introducing them to protected forested ...day's only surviving descendants are several small tree sloths whose range extends from southern Mexico to southern Brazil, he said. Such an experiment mig...

Shade trees getting 'scorched' by plant disease

...NJ, bacterial leaf scorch (BLS) affects many shade tree species such as American elm, red maple, sweet gum...se is estimated at $8,000 per tree. Landowners and tree care professionals in these locations must plan for the loss of property values and high costs of re...

Plant wounds trigger bacteria

...mostly strike the trunks or stems of dicot plants, tree or vines near the ground where freezing occurs during winter and a wound forms in spring. Such fruit trees as cherries and peaches, raspberries and high-quality vine grapes like chardonnay and cabernet sauvignon tend to be susceptible to the disease,...

Seeing the forest and the trees

...-line edition of the journal Science suggests that tree diversity in tropical forests plays a crucial role...ction scenarios and analyzing the resulting mix of tree species, the team was able to determine how much carbon the forest was able to hold. They found, ...

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 fo...

Wright bros. upstaged! Dinos invented biplanes

... two-level, biplane wing configuration to fly from tree to tree in the early Cretaceous. Among the evidence for the early biplane is that Microraptor had unmistakab...

Why Christmas trees are not extinct

... about 100 times larger than the pore in flowering tree valves ?on the scale of one 10-millionth of a mete...e of a given size is 59 times lower in a Christmas tree than in an oak tree." Flowering trees have longer, more efficient conduits, but less efficient val...

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 la...

Storing carbon to combat global warming may cause other environmental problems, study suggests

Growing tree plantations to remove carbon dioxide from the atmo...s where land would be converted from other uses to tree plantations for carbon sequestration. Assessing the impact of existing conversions, the study showe...

Deep treasure to be found in Oculina Bank

...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 scal...

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 w...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 cou...

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