Double trouble for water life
... Excess phosphorus
and nitrogen produced by human activities on ... adds that a dual nutrient strategy tackling both phosphorus
and nitrogen surplus - is necessary to manage ... worldwide. The increasing levels of nitrogen and phosphorus
are of particular concern because an excess of ...
Changing climate will lead to devastating loss of phosphorus from soil
... a dried soil is rewetted impacts on the amount of phosphorus
lost from the soil into surface water and ... climate may limit our ability to mitigate phosphorus
losses at certain times of the year, especially summer.
"This is really worrying because high phosphorus
concentrations in surface waters can lead to ...
A new view of oceanic phytoplankton
... marine ecosystems. The deep sea contains ample phosphorus
but delivery to the surface waters where ... the inability to mix the ocean to depths where phosphorus
is available. Indeed, research conducted at ... Hawaii during the past two decades has shown that phosphorus
is rapidly becoming less abundant in the ...
Nutrient pollution chokes marine and freshwater ecosystems
... lakes, will require reducing both nitrogen and phosphorus
pollution. Because streams and rivers are ...
Plant growth is tied to nitrogen and phosphorus
availability. Human activities have greatly ... emissions from the combustion of fossil fuels. phosphorus
pollution is tied primarily to wastewater ...
Phytoplankton cell membranes challenge fundamentals of biochemistry
... Ocean an area known for its short supply of phosphorus
and nitrogen. A molecule of phosphorus
dissolved in the Sargasso Sea remains there for ... absorbs it. For comparison, in the Pacific Ocean phosphorus
may linger for nearly a year before being used by ...
Tracking poultry litter phosphorus: Threat of accumulation?
... analysis have previously shown that two forms of phosphorus
orthophosphate and phytate (aka myoinositol ... potential to be a significant player in non-point phosphorus
As part of her doctoral ... Hill and Cade-Menun measured changes in phosphorus
forms along a spatial transect on two active ...
EPA and USDA should create new initiative to better monitor nutrients
... reducing nutrient pollutants such as nitrogen and phosphorus
-- across the basin. In addition, the two ... from excess nutrients, such as nitrogen and phosphorus
from fertilizers and other sources, flowing into ... the estimated current flux of nitrogen and phosphorus
being delivered to the Gulf of Mexico from these ...
Improving swine waste fertilizer
... needs of a crop results in application of excess phosphorus
which increases the potential for environmental ... Swine fed corn diets with more highly available phosphorus
produce waste that has a nitrogen to phosphorus
ratio closer to what a crop needs than swine fed ...
Diatoms discovered to remove phosphorus from oceans
... of Technology have discovered a new way that phosphorus
is naturally removed from the oceans its stored ... storing blobs of very dense concentrations of phosphorus
These polyphosphates ... to account for the difference in the amount of phosphorus
thats in the oceans and the amount thats washed ...
Crop management strategies key to a healthy Gulf, planet
... the Environmental Protection Agency realized that phosphorus
also plays a significant role. The team is recommending a 45 percent reduction in phosphorus
and nitrogen from the 1980-1996 average flux ... most significant opportunities for nitrogen and phosphorus
reduction in the Mississippi Basin are promotion ...
AGU Journal Highlights -- March 19, 2008
... the organism laid down each band. Noting that phosphorus
is often a limiting nutrient in the ocean, the ... ablation technique, they found that the ratio of phosphorus
to calcium within the coral skeleton tracks the ... the authors are able to link the coral skeleton phosphorus
content to documented seasonal upwelling of cold ...
2008 Ocean Sciences Meeting -- media advisory 2
... rise. New studies of bays offer insights about phosphorus
ranging from why Florida Bay has seagrass-killing algal blooms despite extremely low phosphorus
from the Everglades to evidence from the ... watershed that 90 percent of the human-related phosphorus
inputs are retained in the watershed.
At the root of nutrient limitation, ecosystems are not as different as they seem
... are a cornerstone of natural ecology, where phosphorus
or nitrogen limits plant production in most ...
Their paper, Global analysis of nitrogen and phosphorus
limitation of primary producers in freshwater, ... point, after which plants stop benefiting unless phosphorus
also is added. If such a system responds ...
Everglades phosphorus limits on the right track, but more is needed
... DURHAM, N.C. State and federal standards for phosphorus
releases into the Everglades seem sufficient to ... by Duke University scientists tracked how various phosphorus
levels affected natural communities in two ... standards protect the wetland. But they warn high phosphorus
levels persist in the outer edges of the ...
Study highlights massive imbalances in global fertilizer use
... where 250 million people remain chronically malnourished, nitrogen, phosphorus
and other nutrient inputs are inadequate to maintain soil fertility."
... 1970s until the mid-1990s. During that period, tons of excess nitrogen and phosphorus
entered the Mississippi River Basin and drained into the Gulf of Mexico, ...
Researchers call for nitrogen and phosphorus reductions to combat eutrophication in aquatic systems
... scientists is renewing calls for policymakers to reduce both nitrogen and phosphorus
when attempting to alleviate eutrophication or nutrient pollution ... to be more successful due to complex interactions between nitrogen and phosphorus
in fresh and coastal water ecosystems.
"If the overall goal of nutrient ...
Princeton-led team finds secret ingredient for the health of tropical rainforests
... air into fertilizer in the soil.
Until now, scientists had thought that phosphorus
was the key element supporting the prodigious expansion of rainforests, ... Earth system," Hedin said. Molybdenum is 10,000 times less abundant than phosphorus
and other major nutrients in these ecosystems.
The discovery has ...
Commercial aquatic plants offer cost-effective method for treating wastewater
... in the June 2008 issue of HortScience that investigated the nitrogen and phosphorus
removal potential by a vegetated, laboratory-scale subsurface flow system. ... available aquatic garden plants received a range of nitrogen and phosphorus
that spanned the rates detected in nursery runoff. According to Polomski, ...
Complex ocean behavior studied with 'artificial upwelling'
... water at a depth of 300 to 700 meters has the proper ratio of nitrogen and phosphorus
to trigger a two-stage phytoplankton bloom. The researchers believe that ... The diatoms will consume the nitrogen, leaving some amount of phosphorus
in the water, which will stimulate a second-stage bloom of nitrogen-fixing ...
Researchers explain nitrogen paradox in forests
In tropical forests, it's the link between nitrogen and phosphorus
that explains the abundance of nitrogen-fixing species.
"Many tropical ... fixation fall out, once you consider the link between the nitrogen and phosphorus
cycles in the tropics"
"Put together, these two factors give us a ...
Will intensive forest practices impact water quality?
... the large one. Fertilization resulted in increased losses of nitrogen and phosphorus
from both the large and small watersheds. The overall magnitude of these ... was small, with 1 to 7% of the applied nitrogen and 1 to 2% of the applied phosphorus
leaving the watersheds in runoff waters. Rainfall nitrogen inputs were ...
American Chemical Society's Weekly PressPac -- Oct. 24, 2007
... Science & Technology
A new method for measuring certain forms of phosphorus
- the nutrient
often responsible for algae blooms that devastate fish ... control officials rarely measure or pay attention to
dissolved organic phosphorus
The new procedure recognizes that enzymes present in ...
Nutrient pollution drives frog deformities by ramping up infections, says CU-Boulder study
... Colorado at Boulder.
The study showed increased levels of nitrogen and phosphorus
cause sharp hikes in the abundance and reproduction of a snail species ... and ecosystem alterations," he said. "What we found is that nitrogen and phosphorus
pollution from agriculture, cattle grazing and domestic runoff have the ...
First finding of a metabolite in 1 sex only
... "chemical shift," indicating the presence of a unique, unidentified phosphorus
They then isolated and analyzed the phosphorus
compound, identifying it as 2-aminoethyl phosphonate, an uncommon but ...
Silicon with afterburners: Process developed at Rice could be boon to electronics manufacturer
... of tuning microscopic circuits to a particular need, and it's been effective so far even in concentrations as small as one atom of boron, arsenic or phosphorus
per 100 million of silicon.
But as manufacturers pack more transistors onto integrated circuits by making the circuits ever smaller, doping gets ...
U-M researcher and colleagues predict large 2009 Gulf of Mexico 'dead zone'
Farmland runoff containing fertilizers and livestock waste---some of it from as far away as the Corn Belt---is the main source of the nitrogen and phosphorus
that cause the Gulf of Mexico dead zone.
Each year in late spring and summer, these nutrients make their way down the Mississippi River and into ...
Newly discovered snow roots are 'evolutionary phenomenon'
... how they had remained undiscovered.
C. conorhiza also possesses normal roots which anchor the plant to the ground and take up nutrients such as phosphorus
and nitrogen. Cornelissen's team hypothesise that the additional snow roots allow C. conorhiza to take nitrogen directly from the snow. Many mountain ...
UCSD researchers make first direct observations of biological particles in high-altitude ice clouds
... researchers performed in-situ measurements of cloud ice crystal residues and found that half were mineral dust and about a third contained nitrogen, phosphorus
and carbon the signature elements of biological matter.
The second-by-second analysis speed allowed the researchers to make distinctions between ...
Mighty diatoms: Global climate feedback from microscopic algae
... wider range of sizes.
One factor that affects growth is nutrient availability, Litchman said. The research shows that limitations by nitrogen and phosphorus
exert different selective pressures on cell size. The availability of these nutrients depends on the mixing of water from greater depths. Using a ...
Understanding phosphorus in soils is vital to proper management
... is one of the key nutrients that can cause algal blooms and related water quality problems in lakes, rivers, and estuaries worldwide. phosphorus
entering waters originates from a variety of sources. Agricultural land receiving long term applications of organic by-products such as animal ...
Eight ASU faculty elected as AAAS Fellows
... to alpine lakes of Norway and Colorado to the Mongolian grasslands of China, to find answers. Understanding the balance of carbon, nitrogen and phosphorus
in systems forms the backbone of Elser's worldview, known as "stoichiometric theory." He has taught more than 10,000 students and his pioneering ...
New study 'pardons' the misunderstood egg
... has 13 essential vitamins and minerals and is an excellent source of choline and selenium and a good source of high-quality protein, vitamin B 12, phosphorus
and riboflavin. In addition to providing one of the most affordable sources of all-natural, high-quality protein, eggs provide a valuable source of ...
A green future for scrap iron
... of biological oxygen demand (BOD) rose from 76 to 87 percent. Improvements were also recorded with the removals of nitrogen (13 to 85 percent), phosphorus
(44 to 64 percent), and colors and dyes (52 to 80 percent).
"Before this project," says Ma, "few people believed scrap iron could work in a ...
New CU-Boulder study shows diversity decreases chances of parasitic disease
... extra limbs and other severe malformations, Johnson said. A 2007 CU-Boulder study led by Johnson showed high levels of nutrients like nitrogen and phosphorus
used in farming and ranching activities fuel trematode infections in North American amphibians by hiking the abundance and reproduction of the snail ...
New book rethinks the relationship between sulfur and crops
... MADISON, WI, October 1, 2008 - As a nutrient, sulfur is often overlooked in favor of nitrogen, phosphorus
and potassium, but a new book explains its crucial role in soil condition, plant growth and nutrition. For agricultural professionals, understanding ...
Experts agree: Environmental standards needed for biofuels
... impacts by using strategies such as no-till farming to minimize erosion and planting cover crops to sequester carbon and reduce nitrogen and phosphorus
run-off," he said. "But few farmers use all of the best available practices because there are limited incentives and many disincentives for them to ...
New way to make malaria medicine also first step in finding new antibiotics
... became interested in anti-malarial medicine because of his interest in phosphonates, molecules that contain direct chemical bonds between carbon and phosphorus
atoms (as opposed to the carbon-to-oxygen-to-phosphorus bonds that are found in most biological molecules containing phosphorus). As a doctoral ...
Childhood dairy intake may improve adolescent bone health
... of dairy intake throughout childhood, and Dr. Moore points out that "dairy is a key source of proteins, calcium, and other micronutrients including phosphorus
and vitamin D." Parents can promote healthy bone development during adolescence by making dairy a regular part of their child's diet.
August 2008 Geology and GSA Today media highlights
... the continental geochemical reservoir, the ocean/atmosphere geochemical system, and Earth's mantle. One of the outcomes of this coupling is that phosphorus
(a key element for DNA), which occurs mainly in the continental crust, was made available in great abundance to the living world courtesy of ...
Amazon powers tropical ocean's carbon sink
... to the ocean floor.
Diazotrophs "fix" nitrogen from the air, enabling them to thrive in nutrient-poor waters. They also require small amounts of phosphorus
and iron, which the Amazon River delivers far offshore.
That is all the diazotrophs need to pull carbon from the air and sink it in the ocean. ...