Tag: "vegetation" at biology news

A global 'catastrophe' -- coal fires threaten environment, human health

...er sources and soils. Heat from the fires can kill vegetation above, even igniting forest fires. Te land itself can subside, posing a risk to local infrastructure. Fighting Back Against Coal Fires Gary Colaizzi's engineering firm, Goodson and Associates, Inc., has developed a heat-resistant "grout," a mixture...

Research reveals use of tree rings and ocean temperature shifts in anticipating megadroughts

...native and non-native species, producing long-term vegetation changes....

Scientists re-evaluating the meaning of 'desertification,' Duke ecologist says

...sertification controversy is the fact that natural vegetation in many areas has been eliminated or severely redu...y itself." His book notes that a temporary loss of vegetation cover due to short term drought is "distinct from, and not necessarily related to" severe soil degra...

Dinosaur, crab fossils reveal ecosystem secrets

...iya Formation probably were scavengers that fed on vegetation and other organic material. They were a possible food source for fish and other vertebrates and invertebrates in the ecosystem. Smith speculates that it is possible that small or baby dinosaurs might have fed on the crabs, but said speculation is th...

Chimpanzees with little or no human contact found in remote African rainforest

...f nervousness, including hiding behind vegetation or climbing higher in the canopy; 11 percent departed; and eight percent ignored the observers. "The high frequency of curious responses to our arrival and the naive contacts su...

Fire frequency determines forest carbon storage

... for close to 25 percent of total carbon stored in vegetation and soils in the Earth's biosphere. Wildfires burn down individual areas every 40 to 250 years and are an important part of this ecosystem. Whether or not these forests are likely to lower or raise levels of carbon dioxide in the atmosphere depends o...

Riparian birds can rebound after cows are gone

...desert-scrub). They also determined the density of vegetation at the peak of summer growth several times over th... that removing the cows dramatically increased the vegetation in the study area: the density of native plants (such as grasses, cottonwoods and willows) increased...

Yellowstone wolves, grizzlies and moose 'dysfunctional' study says

...system. Other markers of recovery include restored vegetation communities, birds that rely on these, and the behavior of other prey species. "Grizzly bears and wolves in Wyoming are currently protected under the Endangered Species Act, which specifies that recovery includes both the species and the ecological ...

Science picks-leads, feeds and story seeds (May 2003)

...eserts.html (There's also a neat photo of desert vegetation at the Amargosa Desert Research Site where USGS scientists are studying methods for characterizing the mechanisms that control subsurface migration and fate of contaminants in arid environments.) Gail Wendt, gwendt@usgs.gov ,703-648-5604. FEEDS ...

Global garden grows greener

...(NPP) of plants from climate and satellite data of vegetation greenness and solar radiation absorption. NPP is t...at GSFC and BU. "Systematic observation of global vegetation is being continued by NASA's Earth observing satellites. Earth observing satellites are paving the w...

Science Picks-Leads, Feeds and Story Seeds (June 2003)

...echnologies in its ability to physically penetrate vegetation and murky water, providing reliable measurement of the underlying topographic surface. To see the AHF in action, go to http://www.usgs.gov/features/h_finder.html . Further information is available at http://sofia.usgs.gov. Jon Campbell, joncampbel...

First soybeans grown in space similar to Earth-grown crops

... crops unleashing the ability to sustainably grow vegetation to support long-term human presence in space. Soybeans are one of the most consumed crops in the world today. During a DuPont research mission that concluded with the return of Space Shuttle Atlantis in October, soybean seeds planted and nurtured b...

New owl species discovered in Brazil

... than 10 percent of the Atlantic Forests' original vegetation remains. In an area 50 times smaller than the Brazilian Amazon, it holds an incredible 20,000 plant species, 40 percent of which are found no where else. Combined, the 25 global biodiversity hotspots contain 60 percent of terrestrial plant and animal...

Harry Potter and the Ecuadorian flowers

... is now gone because trees have gone to lumber and vegetation has been burned to clear pastureland," said Struwe. "In Ecuador alone, a recent estimate is that 83 percent of all plant species are threatened with extinction, a much higher percentage than we previously thought." The newly discovered plant belongs...

Researchers discover birds protect trees in neotropics by eating insects

...opulations on the accessible leaves of lower level vegetation were not observed during the insect-laden rainy season. The three tree species that were involved in the study were Anacardium excelsum, Cecropia longipes and Cecropia peltata. Van Bael returned to Panama in late May to begin postdoctoral research at...

Alien earthworms changing ecology of Northeast forests

...ll as on the duff the spongy layer of decomposing vegetation beneath the leaf litter. Grres said that while earthworms do an excellent job of recycling nutrients, "when they eat away the duff layer, all the plant seeds that germinate there, like trillium and mayflowers and wood anemone, may disappear or may n...

Researchers find 'luxury effect' helps determine plant diversity in urban areas

...us, species composition, and physical structure of vegetation in residential yards in several other cities, leading us to suggest that the relationship between wealth and plant diversity maybe characteristic of urban landscapes generally," the researchers reported....

Passing its global sight test leaves MERIS ready for work

...l concentration, cloud-top pressure or terrestrial vegetation cover, to a maximum resolution of 300 metres from 800 km away in space. Immediately Envisat was launched ESA began a calibration campaign to make sure all instruments, including MERIS, were working optimally. But the processor algorithms applied to ...

Dodging elephants, scorpions, mudslidesUF researcher tracks tigers

...re tracks are hard to find, or lose definition and vegetation blunts radio signals. As a result, Kawanishi used ...rivers and streams cutting through valleys. There, vegetation is so thick as to nearly blot out all light. Seeking to maximize the chance of photographing tigers,...

Satellites will join search for source of Ebola virus

To assist search efforts, from next year detailed vegetation maps of Congo and Gabon will be created with satellite images as part of a new ESA Data User Element project called Epidemio, developing Earth Observation (EO) services for epidemiologists. The Gabon-based International Centre for Medical Research (...

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