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Tag: "trees" at biology news

Oxygen increase caused mammals to triumph, researchers say

...about 10 million years ago, reducing the number of trees and, therefore, the amount of photosynthesis and oxygen. ...

Woods Hole Research Center plans controlled burn in Amazon rainforest

... prior to the burning ?inventories of thousands of trees to catalogue their species, size, and number, surv...est. After the burn, a census will be taken of the trees to see how many have survived or how they may be reacting or recovering from the burn; and canopy de...

Snapin: A protein with therapy potential for autism

Rutgers' Bonnie Firestein likens nerve cells to trees -- some are short and bushy with many branches while others are tall with a few branches coming out of one or two main trunks. Different branching patterns correlate with specific disorders and Firestein's quest is to discover how these dissimilar pa...

Stem Cells to Solve the Blood Shortage Problem?

...but the researchers found few examples of mangrove trees actually being uprooted. However, mangroves at numerous sites had experienced pre-tsunami degradation. This disruption, resulting from human impact, included "cryptic ecological degradation" (see also Current Biology, March 29, 2005), which involves...

Could better mangrove habitats have spared lives in the 2004 tsunami?

...but the researchers found few examples of mangrove trees actually being uprooted. However, mangroves at numerous sites had experienced pre-tsunami degradation. This disruption, resulting from human impact, included "cryptic ecological degradation" (see also Current Biology, March 29, 2005), which involves...

Where Bacteria Get Their Genes

...ntists have argued that drawing traditional family trees does not make sense for bacteria, because their ge...g into account the acquired genes, and matched the trees to an established reference tree. For all genes, the match was about 95 percent. This showed that th...

Researchers discover key gene involved in bark beetle pheromone production

...k beetles plague pine forests, especially when the trees are stressed. The Lake Tahoe basin lost 30 percent of its pines to bark beetle infestation during the 1986-1994 drought, according to Blomquist. There are several hundred species of bark beetles, which are in the insect family Scolytidae. These beet...

Researchers reveal secrets of flying snakes

...lying snakes grow 3 to 4 feet long and live in the trees in the lowland tropical rainforests of South and Southeast Asia. Their temperament varies from species to species, and from individual to individual, but all five species of flying snakes are in the Colubridae family and officially are classified as ...

Alien woodwasp, threat to US pine trees, found in N.Y.

...ct species has devastated up to 80 percent of pine trees in areas of New Zealand, Australia, South America and South Africa. If established in the United States, it would threaten pines coast-to-coast, particularly in the pine-dense states in the Southeast. One target would be loblolly pines in Georgia. F...

Fungus Effective Against Winged Termites

...They envision applying the fungus to buildings and trees already known to harbor termites before the swarms are in full swing. ARS is the U.S. Department of Agriculture's chief scientific research agency. ...

U.N. mulls the protection of Earth's forests

...ders. Barring the occasional hurricane or tornado, trees tend to stay put. "It's partly a matter of sovereign property rights," Auer said. "Governments will look at a forested area and say, 'This resource is mine. I don't want someone else telling me how to manage it.' Nevertheless, there are regional and...

Bugs, even 'bad' ones, can be educationally beneficial, new book says

...attached to and suck juice out of leaves, infested trees so densely that the trees appeared to be covered with snow. Introduction of 129 Australian ladybird beetles (Rodolia cardinal...

Where bacteria get their genes

...ntists have argued that drawing traditional family trees does not make sense for bacteria, because their ge...g into account the acquired genes, and matched the trees to an established reference tree. For all genes, the match was about 95 percent. This showed that th...

Researchers find gene that may be at root of potato blight

...dden oak death, which is devastating stands of oak trees along California 's coast and is present in at least three other states. Kamoun conducted the multidisciplinary study with lead author Miles Armstrong and other researchers from the Scottish Crop Research Institute in Dundee; Jorunn Bos, a graduate ...

What the eye doesn't see

... Cuthill and his team pinned artificial 'moths' to trees in a field with a dead mealworm attached. The 'moths' were triangular pieces of waterproof card with specific patterns printed on them. By varying the colours, size and location of patterns on the moths the team were able to mimic real tree character...

Stealth Worms May Improve Insect Pest Control

...rests," Stock says. "We sweep from the tops of the trees all the way to the ground, searching for nematodes that are potential insect pathogens. The misconception is that they are concentrated more in temperate zones, but this is not true. We're trying to unveil the mystery of nematode diversity in the tro...

Man-made wetland's effectiveness similar to natural marsh

...let nature take its course, Mitsch said. Stands of trees surrounded part of the wetland. "This area once was a wetland," Mitsch said. "So it reverted pretty quickly to that kind of ecosystem when it had the chance." Over the two-year study, the wetland reduced concentrations of nitrates by 40 percent and...

Shift of weather patterns necessitates rethinking of reforestation methods

...eason is under way, the fall-planted containerized trees are really taking off," Taylor said. "Some are 7 f...all factors with bare root seedlings, he said. The trees may arrive at the site already stressed. "And this is a big factor in their survival," Taylor said....

Advances in the characterisation of the oyster mushroom genes

...ature, the oyster mushroom grows on dead trunks of trees where the lignin and cellulose ?the two principal components of wood - are being broken down. Degradation of lignin has been studied over the years by a number of research teams that have characterised the genes involved. But nobody, to date, has tac...

Live fast, die young true for forests too

...ed, or if tree death rates doubled, the numbers of trees in these forests would be halved in just 30 years....em pointed out that increased dominance by younger trees could also lead to changes in the amount of carbon stored in forests, though the direction and magni...

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