Tag: "vegetation" at biology news
Ocean Sediments Contain Record of Past Vegetation Fires in Africa
Ocean sediments contain a record of past vegetation
fires, called biomass burning by scientists -- and this record shows much more past burning, at least in Africa during the Pleistocene era, than researchers expected. National Science Foundation (NSF)-funded marine geologists David Verardo an...
Duke Ecologist Says Logging Is Creating 'Mahogany Deserts'
...ogany seedsources while leaving standing competing vegetation
of other species,"she writes. Snook's article also supports the American mahogany's listing under AppendixII of the Convention on International Trade in Endangered Species as "aspecies which although not necessarily now threatened with extinction ma...
NCAR Scientist Models Earth's Climate and Vegetation Patterns At Last Glacial Peak
...lder, has used NCAR computer models of climate and vegetation
to find which plant types our ancestors would have...evaporation). To the climate model Felzer added a vegetation
model that included 110 different plant types divided into 12 categories, including needle-leaf ever...
NCAR Scientists Trek To Africa For Biosphere-Atmosphere Chemistry Study
...-savanna boundaries, and the influence of tropical vegetation
on global air chemistry. This fall's field work, w...data throughout the study area--to explore how the vegetation
and fires interact with the atmosphere. "There's never been a program in this region that has combin...
Scientists Trek to Africa for Biosphere-Atmosphere Chemistry Study
...t-savanna boundaries and the influence of tropical vegetation
on global air chemistry. This fall's field... data throughout the study area to explore how the vegetation
and fires interact with the atmosphere. To sample the African atmosphere, EXPRESSO is using:...
Plants Have Future As Environmental Clean-Up Agents
...ich are present inthe root zone." In essence, the vegetation
serves as a pump bringing contaminatedwater close ...ons of dollars,"he said. "We're finding the use of vegetation
has use in a number ofenvironments and a number of problems." That's hopefully going to be the case...
No Such Luck: Nitrogen From Air Pollution Unlikely to Moderate Global Warming
...ive prairie species went extinct, the diversity of vegetation
dropped sharply, and the ability of the prairie grasslands to store carbon disappeared. "From a global change perspective, this is the first long-term field experiment to demonstrate the tight linkages between nitrogen deposition, carbon dyna...
A Phoenix From A Ring Of Fire Is A Pattern For The Recovery Of Mount St. Helens
...sia, are rich tropical rain forests abundant with vegetation
and wildlife, and seemingly an eternity away from...ionally, rainfall and erosion will sweep away the vegetation
clinging to the pumice substratum, and the cycle of growth will begin once again. "But gradually, a...
Isle Royale Moose Continue Decline
...ood from the standpoint that it gives the island's vegetation
a chance to recover from years of overbrowsing. He expects moose numbers to increase slightly if this year's calf production is good, but says wolves should play a significant role in determining the size of the moose herd in the foreseeable future. ...
Hot 'Lanta: NASA, School Kids Team To Study How Trees Help Cities Keep Their Cool
...ar hotter than the woods because a meadow has less vegetation
andshade. It's important to understand that just as much sunlight falls on cities as on woodlands of the same size. The difference is inhow urban materials react to the absorption of solar radiation. Asphalt in parking lots and on rooftops, in parti...
Purdue-Made Soil Benefits The Environment
...dustries could use it to reclaim areas depleted of vegetation
by industrial use. "There are a number of sites, s...d," she says. "To reclaim these sites quickly with vegetation
requires nutrient-rich topsoil, and we can't afford to take that away from farms. In addition, if th...
Roadsides Benefit From Waste, UF Researchers Say
.... DOT landscape architect Gary Henry said roadside vegetation
is necessary because it ensures the structural integrity of the roadbed by preventing soil erosion and keeping asphalt from crumbling. He said the news that roadside composting looks promising is welcome. "Importing topsoil and adding fertilizer is v...
10,000-Year-Old Clues Suggest Future Forest Changes
...e explains. Mathewes studied pollen to reconstruct vegetation
- as old as 10,000 years - found in lake bottoms and wetlands. He has found that from 9,000 to 7,000 yearsago in B.C. there was a warming trend similar to what is currently being predicted for the next century. His findings, confirmed by a serendipit...
Biogenic Emissions Higher Than Expected Over African Savanna
Air-pollution-related hydrocarbon emissions from vegetation
are much higher than expected over the African savanna (flat tropical grasslands), while those coming from the rain forests are somewhat lower than prior estimates, according to scientists. The National Science Foundation (NSF)-funded research team ...
New Study Shows Dinosaurs From Gobi Desert Site Killed In Sudden "Sand Slides" Falling From Dunes - Study Also Reports First Dinosaur Tracks From Gobi
...es)accumulates because the dunes are stabilized by vegetation
and so do notactively migrate. Conversely, the dunes of most active dunefields have verysmall quantities of clay because such coatings are knocked off as the individualsand grains bounce over the desert floor. The team plans to conduct a series ofe...
Virginia Tech Engineers Help Mother Nature Clean Up
...opof a landfill site, and they have proof that the vegetation
istaking all of the nitrate out of the leachate, "and the treesare growing like wild fire." She adds that they have also been successfulin using the trees as part of a wastewater treatment process.A last step was added to the process that took the...
$2 Million Dollar Grant Funds Salton Sea Web Site
...nd ownership of surrounding land, and the types of vegetation
and animal lifein the area. Actually a landlocked lake, the Salton Sea is located 30 miles south of Indio ina desert valley 278 feet below sea level. The lake stretches across Riversideand Imperial counties and measures 40 miles long and 17 miles wid...
Carbon In Boreal Forests: Temporary Or Permanent?
...st fires, eventuallyreturning the carbon stored in vegetation
and soils to the atmosphere. In turn,seedling regrowth begins a new cycle of carbon uptake. Human disturbances suchas harvesting and fire control add to the natural disturbances driving thiscycle. Changes in disturbance regimes, both natural and hum...
Can Plants Influence The Climate?
...s, and raising globaltemperatures. The changes in vegetation
that are most likely to influence the climate incl...on rainfall, changes in the height or roughness of vegetation
which affect windspeed, and changes in the of the vegetation
albedo (or the degree to whichplants re...
Late Blight Battle Goes Online, Marking 150 Year Struggle Since Irish Potato Famine
...igorousgreen crops into seas of blighted, decaying vegetation
in just a few weeks. "Throughout Europe the potato crops failed," says Gail Schumann, plantpathologist at the University of Massachusetts and member of APS. According toher book, Plant Diseases: Their Biology and Social Impact, "The disaster waswo...
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