Tag: "webs" at biology news

Presence of wolves allows aspen recovery in Yellowstone

...ificant stream erosion. Beaver dams declined. Food webs broke down, and the chain of effects rippled through birds, insects, fish and other plant and animal species. Aspen, a beautiful hardwood tree with golden fall color, a key to ecosystem biodiversity and a hallmark feature of mountain areas across t...

UCR biologists unravel the genetic secrets of black widow spider silk

...d by spiders as the structural foundation of their webs and to support their body weight as they move about. The dragline silk of black widows is one of the strongest and toughest spider silks identified thus far. ...

Will lemmings fall off climate change cliff?

... players in an effort to assess the status of food webs across Arctic ecosystems. The project will undertake detailed studies on lemmings and their predators at several sites through the arctic, including the northern Yukon and Bylot Island, Nunavut, and will run until 2010....

Fascinating spider silk

...aver spiders to spin the edges and spokes of their webs and to rappel away in the face of danger is made of two different proteins. The Munich team has now successfully used genetic engineering to produce one of the spider silk proteins of the European garden spider (Araneus daidematus). While purifying t...

Fish extinctions alter critical nutrients in water, study shows

Ecosystems are such intricate webs of connections that few studies have been able to explore exactly what happens when a species dies out. Now, a Cornell study using computer simulations has teased out how the disappearance of a freshwater fish can affect the availability of certain n...

Changes in west coast marine ecosystems significant

...ing hypoxic zones, and the collapse of marine food webs off the western coast of the United States.These changes, driven by new wind patterns, are consistent with predictive models of global climate change, scientists said this week at the annual meeting of the American Association for the Advancement of ...

Newly discovered West Coast arrhythmias cause

...ng growth of phytoplankton and fueling marine food webs from the bottom-up. Many marine animals time thei...ood thing because they ultimately support the food webs that produce the crabs, salmon and tuna," says Bruce Menge or Oregon State University. "But too much...

2006 AAAS Philip Hauge Abelson Prize awarded

...ll. And second, I always enjoy what I call weaving webs knowing a little bit about what this person is interested in, what that person does, and what the capability is over here" and bringing people together on challenges. Vest also spoke of the changes for MIT and other institutions in the wake of the...

Cold climate produced by algae contributed to onset of multicellular life

...to thrive. The diversification of the marine food webs introduced by multicellular predators as well as the moving and burrowing activity of animals on the seafloor contributed to a more efficient decomposition of the algae-produced organic carbon, which slowed the rate of organic carbon sequestration. T...

'Biomimetic Technologies' project will create first soft-bodied robots

...cret of how spiders and silkworms are able to spin webs and cocoons made of incredibly strong yet flexible fibers. More recently, his team applied genetic engineering and nanotechnology to create a "fusion protein" that for the first time combined the toughness of spider silk with the intricate structure ...

MIT creates 3-D scaffold for growing stem cells

...s to grow on them is like forcing spiders to build webs on skyscraper girders. Zhang's nanofiber scaffold, around 1,000 times smaller than the existing systems, is much closer in size to the extracellular matrices that living cells manufacture themselves. Adding motifs With the addition of defined ami...

Insect population growth likely accelerated by warmer climate

...characteristics such as species diversity and food webs are very sensitive to the population growth rates of the species living and interacting in those ecosystems. She noted that biochemical adaptation to warmer temperature is not the only possible insect response to climate warming. Some species migh...

ACS News Service Weekly PressPac -- Oct. 4, 2006

...e lore dates to the first century A.D. when spider webs were prized as wound dressings. They even found a place in Shakespeare's Midsummer Night's Dream: "I shall desire you of more acquaintance, good master cobweb," the character "Bottom" said. "If I cut my finger, I shall make bold of you." The scanty ...

Tarantulas produce silk from their feet

...cated on their abdomen and to use the silk to form webs for protection and capturing prey rather than for locomotion. The findings are published in the current issue of Nature. "If we find that other spiders in addition to these tarantulas have the ability to secrete silk from their feet, this could r...

Insect predation sheds light on food web recovery after the dinosaur extinction

...ptions that have given us new ideas about how food webs recover from mass extinction," he added. The res...y isolated occurrences of severely unbalanced food webs may be a widespread feature of ecological recovery from mass extinction, resulting from instability,...

'Dead Zone' causing wave of death off Oregon coast

...ents that provide nutrients to the productive food webs and fisheries of the Pacific Northwest. These cruc...ns can disrupt the balance between productive food webs and dead zones. This breakdown does not appear to be linked to ocean cycles such as El Nio or the P...

Media advisory: International mercury conference coming to Madison Aug. 6-11

...adily be converted to methylmercury and enter food webs in these remote regions. They are also beginning to examine the link between mercury deposition and global climate change. Biologists have documented increasing concentrations of mercury in Arctic marine mammals, fish and seabirds, despite reductions...

Study shows that parasites form the thread of food webs

...d that parasites are suprisingly important in food webs and their findings appear in a report published th...ty of California for research and teaching. Food webs trace the flow of energy through an ecosystem. They extend the concept of food chains those who-eat...

Report warns about carbon dioxide threats to marine life

... algae and animals is likely to impact marine food webs and has the potential to substantially alter the biodiversity and productivity of the ocean," says Victoria Fabry of California State University, San Marcos, who is another of the report's authors. Threats to major ecosystems Several other majo...

Marine protected areas not sufficient to protect global biodiversity

...result is more natural species abundances and food webs evident as larger population and body sizes of fish and crayfish, and higher production of their young."...

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(Date:7/23/2014)... Canada has issued a high health risk warning for ... the region due to forest fires. In the ... drifting eastward along normal wind patterns. Fire is ... from fires is not quite so obvious and its ... type of fire (forest, brush, crop, structure, tires, waste ...
(Date:7/23/2014)... DC -- The planet,s soil releases about 60 billion ... is far more than that released by burning fossil ... This enormous release of carbon is balanced by carbon ... other plant matter, as well as by the underground ... have documented that rising temperatures increase the rate of ...
(Date:7/23/2014)... local and national governments struggle to deal with ever-growing ... refining the picture of just how much there is ... ACS journal Environmental Science & Technology , their ... developed countries discard floods into just seven developing countries ... who live there. , Knut Breivik and colleagues note ...
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