Tag: "phosphorus" at biology news
No Such Luck: Nitrogen From Air Pollution Unlikely to Moderate Global Warming
...l-documented changes that occur in some lakes when phosphorus
is added, the researchers said. In lakes lacking phosphorus, the addition of this nutrient -- often a result of human activities -- causes "eutrophication," a process that leads to increased growth of algae and other undesirable outcomes. Ti...
Bottom-up Ecological Processes Better For Clear Waters, Study Finds
...itrogen (typically from sewage and fertilizer) and phosphorus
(from nearbyconstruction or logging) feed the tiny marine plants known more commonlyas algae. Algae thrive on these pollutants. The quantity of algae directly determineswater clarity. In a process called eutrophication, algae can deplete oxygen,kill...
Nutrients, Ground Water, And The Chesapeake Bay - A Link With Pfiesteria?
... It is possible that about 10 to 20 percent of the phosphorus
entering the Chesapeake Bay also travels through ground water. (A key factor in understanding Chesapeake Bay nutrients is that half of the Bay's water comes from freshwater sources and the other half comes from the ocean.) Travel time of the ground ...
Researcher Discovers Plant Genes For Phosphate Uptake
...dings of the National Academy of Science. "Lack of phosphorus
fertilizer is going to be a serious problem in the...y in the tropics, unless we find another source of phosphorus
in the world or unless we create plants that are more efficient phosphorus
users," says K.G. Raghoth...
Purdue Research Helps Keep Phosphorus Out Of Surface Water
...erly, but no more. That's important because excess phosphorus
can find its way into surface water, where it caus... the problem. The next step is to help farmers use phosphorus
efficiently. U.S. researchers knew years ago that excess phosphorus
in rivers could cause trouble, b...
Reduced Nutrients Still Cause Problems In The Neuse And Tar-Pamlico Rivers
Concentrations of phosphorus
and nitrogen have generally declined since 1980 in...ished USGS report indicates that concentrations of phosphorus
and nitrogen in the Neuse River and Tar River exceed water-quality guidelines that were established ...
From The Home Front To The River Front, USGS Updates Water-Quality Information
...cial fertilizers are major sources of nitrogen and phosphorus
in the Chesapeake Bay watershed. We now have good...igrams per liter. Concentrations of nitrogen and phosphorus
have changed over the past 10 to 20 years in the rivers where they flow into Chesapeake Bay. The am...
Comprehensive Nutritional Status In Patients With Long-Standing Crohn Disease Currently In Remission
...unctional index). Mean daily intakes of fiber and phosphorus
were significantly lower in CD patients than in control subjects. Serum concentrations of several nutrients ( b -carotene, vitamin C, vitamin E, selenium, and zinc) and activity of the enzyme glutathione peroxidase were also significantly low...
"A Little Bit Here" And "A Little Bit There" Can Add Up To A Big Problem
...ollutants, the ESA report focuses on theeffects of phosphorus
and nitrogen. While both of these are important n...en the excess nutrients in therunoff, specifically phosphorus
and nitrogen, cause a burst of algal andbacterial growth that leads to a loss of much of the dissolv...
Open-Air Experiment Shows High CO2 Boosts Tree Growth
... leaveshaving lower concentrations of nitrogen and phosphorus
in them, not because theyare taking up less nitrogen and phosphorus
from the soil, but because they'regrowing so fast that the same nitrogen and phosphorus
New Research Shows Loggerhead Sea Turtles Sustain Delicate Dunes
... thesis, monitored the beach for energy, nitrogen, phosphorus
andlipids left behind by turtle eggs and the possible effects those nutrientshad on the beach ecosystem. Karen Bjorndal, a UF zoology professor and director of the Archie CarrCenter for Sea Turtle Research, said nesting beaches typically are ...
The Sagan criteria for life revisited
...NOPS elements--carbon, hydrogen, oxygen, nitrogen, phosphorus
and sulfur. To reproduce the chemistry of an interstellar molecular cloud, Bernstein's group followed a simple recipe: 1. mix carbon and hydrogen molecules, the PAHs, with water ice at minus 440 degrees Fahrenheit, the temperature inside an inte...
Many contaminants found in nation's streams, but few drinking-water standards exceeded, USGS report shows
...quatic environment, concentrations of nitrogen and phosphorus
commonly exceed levels that can contribute to excessive growth of algae and other nuisance plants in streams. Such growth can clog water intake pipes and filters and interfere with recreational activities, such as fishing, swimming and boating. The...
Conserving the Everglades: Less is more
... near agricultural runoff had up to 2.5 times more phosphorus
in thetop 4 inches of their soil. The researchers found that compared to other freshwater wetlands, theEverglades' low-phosphorus areas had unusually high levels of dense algae matsand unusually low levels of invertebrates and fish. These areas were...
Changes for chickens? New hybrid corn helps reduce phosphorus in poultry litter, UD scientists report
...S. Department of Agriculture scientists say. Total phosphorus
levels dropped by 41 percent after chickens ate a ...ng the hybrid corn, reduced levels of supplemental phosphorus
and thephytase enzyme, says George Malone, a UD poultry extension specialist andassociate scientist....
Virginia Tech microbe-minerals group launches new field of study
...ce their cell size, so they can'digest' and absorb phosphorus
from the mineral-oxide surface. Many otherdegrees and types of interactions take place as well. In addition to being a nutrient for the microbes, phosphorous can be a plantnutrient or a water contaminant. "Confidence that phosphorous--and otherminera...
Pollution makes crustaceans adapt rapidly
...e Constance suffered environmentaldegradation from phosphorus
pollution, populations of tiny crustaceans called Daphnia found more and more toxic cyanobacteria (also called "blue-greenalgae") mixed with their favorite food, a more edible type of algae. So thecrustaceans adapted to handle a less nutritious fo...
The future of planet earth: scientific challenges in the coming century
...ce of excess amounts of the nutrients nitrogen and phosphorus
that cause increased growth of aquatic plants, whi...ntists are measuring the transport of nitrogen and phosphorus
to coastal areas by major rivers and determining how much of the nutrients that enter the streams ac...
Could fish clean up sewage works?
...sludge-dwelling bacteria. But few remove dissolved phosphorus
and nitrogen from detergents and fertilisers. When...rks in Waco, the system removed 82 per cent of the phosphorus
and 23 per cent of the nitrogen. In its current form, the system occupies a large area, making it u...
NC State scientists confirm second toxic pfiesteria species
...ogen, while P. piscicida seems to prefer increased phosphorus
levels, although both nitrogen and phosphorus
can stimulate it to grow. Scientists first detected P. shumwayae which they suspected to be a new s...
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