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Tag: "tree" at biology news

The secret lives of whales

...e ability to read genes to counting the rings of a tree ?but looking at the history of an entire population, not just an individual. “Knowing the history of populations is critically important to managing their future,?says Palumbi, “especially for populations like these whales that have figured out how t...

New Clues Add 40,000 Years to Age of Human Species

...astern Mediterranean, which, along with ice cores, tree rings and annual lake deposits, are part of the geological record scientists study for indications of climate change. The team believes the Africa-Mediterranean correlation ties both regions to moister climates long ago, yielding another method to un...

Essential mangrove forest threatened by cryptic ecological degradation

...from adverse shifts in the composition of mangrove tree species to disrupted ethnobiological relationships, lagoon fisheries, and many additional functions provided by mangroves. The authors believe that the worrying aspect of the research is that a degradation of the most vulnerable, most socio-economic...

New protein discovered by Hebrew University researchers

...overing and isolating a new proteinfrom the poplar tree with special structural and qualitativecharacteristics that could have consequences for development of futurenanocapsules for drug delivery to cancer cells.In addition to being obtained from plant tissue, the protein can nowalso be produced in large ...

The death of a very special chimpanzee

...overing and isolating a new proteinfrom the poplar tree with special structural and qualitativecharacteristics that could have consequences for development of futurenanocapsules for drug delivery to cancer cells.In addition to being obtained from plant tissue, the protein can nowalso be produced in large ...

First real-time view of developing neurons reveals surprises, say Stanford researchers

...ey could watch the branches grow and recede like a tree waving in the wind, losing the occasional twig. Over time, the network of branches stabilized into the mature form. "We're looking at a dynamic process that nobody has ever seen before," Smith said. Understanding how neurons mature into their adult...

Falling ants glide back to trunk to avoid dangers of forest floor

...and then made this nice little cascade back to the tree trunk," said Yanoviak via phone from Iquitos. "Tha...called Cephalotes atratus ?are able to land on the tree trunk and climb back up, as compared to a mere 5 percent that would be expected to land on the trunk...

World's largest rainforest drying experiment completes first phase

...es to the "umbrellas" from the normal variation in tree growth, tree death, leaf production, and other aspects of forest behavior, researchers compared this dry plot of ...

Family trees of ancient bacteria reveal evolutionary moves

...olution of Cyanobacteria, Blank drew up a backbone tree using multiple genes from whole genome sequences. Additional species were added to the tree using ribosomal RNA genes. Morphological characters, for instance, the presence or absence of a shea...

Live fast, die young true for forests too

...) and "withdrawals" (tree deaths) are high. But if tree births suddenly stopped, or if tree death rates doubled, the numbers of trees in these forests would be halved in just 30 years. In con...

Biodiversity hotspots identify conservation priorities

...demics), about a third of the world's oak and pine tree species, and over 1,500 vertebrate species (including 134 endemic species). Among many charismatic flagship species in the region is the volcano rabbit or zacatuche (Romerolagus diazi), one of the world's smallest rabbits, which is found only in the ...

Shift of weather patterns necessitates rethinking of reforestation methods

...ers can greatly increase the survival rate of pine tree seedlings by changing when and how they plant, according to research conducted here. "There's been too many (reforestation) failures over the last decade or so," said Dr. Eric Taylor, Texas Cooperative Extension forestry specialist. "Some landowner...

FDA Works To Speed The Advent Of New, More Effective Personalized Medicines

...n on submitting genomic data, including a decision tree to simplify data submissions, relevant regulatory information, and FDA contact information. FDA has already received several pharmacogenomic data submissions through both the regulatory and voluntary processes and will continue to work closely with ...

The biggest family tree ever

...hat every tenth person is building a little family tree at home. They go to all the records and they're using Web sites to trace back their history." The UA scientists will analyze a tiny fraction of the participants' genetic material: the y-chromosome, which is passed on from father to son, and mitochon...

Finding hidden invaders in a Hawaiian rain forest

... The fingerprints showed where the native dominant tree 'ohia' (Metrosideros polymorpha) has been taken ov...ties. On Kilauea Volcano, the native Metrosideros tree typically has a low concentration of nitrogen in its leaves ( .6% to .8%), while the invading Canary...

Retrovirus struck ancestors of chimpanzees and gorillas millions of years ago, but did not affect ancestral humans

...struck after humans had split off the evolutionary tree from primates, researchers said. The infection may have played a role in the evolution of such great apes as chimps and gorillas. The research appears in the April issue of the journal Public Library of Science-Biology, which is available online on M...

Nature provides inspiration for important new adhesive

...lso been explored to create the new adhesives from tree bark or wood decayed by brown rot fungus. Regardless of the material used to produce the adhesives, they are renewable and may reduce the need for the currently used urea-formaldehyde wood adhesives that have health concerns, and are based on increas...

Mother birds increase progesterone to hatch females

...uch as the Seychelles warbler, the zebra finch and tree swallow, adaptively manipulate the sex of their offspring before an egg is laid," says Stephanie Correa, a doctoral student in neurobiology and behavior at Cornell and the lead author of the study that was posted online recently in The Royal Society'...

What the eye doesn't see

...erns on the moths the team were able to mimic real tree characteristics and identify which pattern combinations were the most successful. Professor Innes Cuthill said: "The rate at which mealworms were eaten by birds gives a measure of how effective each combination was at preventing detection by a preda...

Chemists synthesize molecule that helps body battle cancers, malaria

...ia. An extract from the bark of the South American tree Quillaja saponaria Molina, QS-21A is available only in small quantities. "Now that we have synthesized this remarkable molecule and confirmed its structure, we are in a position to examine how it works and investigate ways to improve its performance...

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