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Piecing together the cyanobacteria puzzle
Blue green algae are significant species in the global carbon cycle because they transform nitrogen gas from the atmosphere into a useable nutrient, enabling photosynthesis in nutrient-poor waters.   view more (2007-07-11)

New research may reduce global need for nitrogen fertilizers
Research published tomorrow (June 29) in the journal Nature reveals how scientists at the John Innes Centre (JIC), Norwich and Washington State University, USA have managed to trigger nodulation in legumes, a key element of the nitrogen fixing process, without the bacteria normally necessary.   view more (2006-06-29)

Drought reduces nitrogen-fixing in legumes
In drought conditions, the capacity for retaining carbon in legume nodules is limited and this may be the reason why there is a drop in nitrogen-fixing in legumes under these conditions. This was the conclusion of Mar'­a Dolores G'Ħlvez in defending her PhD thesis at the Public University of... view more (2005-02-04)

Tropical plants go with the flow ... of nitrogen
Tropical plants are able to adapt to environmental change by extracting nitrogen from a variety of sources, according to a new study that appears in the May 7 early online edition of The Proceedings of the National Academy of Sciences.   view more (2007-05-08)

New strains of symbiotic nitrogen fixing Proteobacteria
Nitrogen is essential for plant growth. Legumes, representing the Earth's largest family of plants, can fix atmospheric nitrogen necessary for their growth thanks to an association with bacteria, the rhizobia. This ability proves to be particularly valuable when soils are poor in nitrogen. The... view more (2001-06-19)

Fertilizers - a growing threat to sea life
New study on landscape around Chesapeake Bay says imbalance in nitrogen cycle is damaging water quality and fish populations.   view more (2008-10-22)

Asthmatic children in multi-family housing hit by indoor nitrogen dioxide
Children with asthma living in multi-family housing who are exposed to certain levels of indoor nitrogen dioxide, a poisonous pollutant byproduct of gas stoves and unvented heaters, are more likely to experience wheeze, persistent cough, shortness of breath and chest tightness.   view more (2006-02-01)

New findings blow a decade of assumptions out of the water
The Atlantic Ocean doesn't receive the mother lode of fixed nitrogen, the building block of life, after all. Instead, comparing fathom for fathom, the Pacific and Indian oceans experience twice the amount of nitrogen fixing as the Atlantic.   view more (2007-01-11)

A Little Nitrogen Can Go a Long Way
Varying the rate of crop production inputs such as fertilizer and seed makes intuitive sense, as farmers have long observed differences in crop yield in various areas of a single field. The availability of spatial yield information from combines equipped with yield monitors has provided a good... view more (2008-09-04)

Too much water, fertilizer bad for plant diversity
Too much of multiple good things - water or nutrients, for example - may decrease the diversity of plant life in an ecosystem while increasing the productivity of a few species, a UC Irvine scientist has discovered.   view more (2007-03-27)

Gene discovery suggests that plant breeders may be able to produce nitrogen-fixing crops more easily than previously thought.
Scientists at the Sainsbury Laboratory (SL)[1], Norwich, have today reported the discovery of a plant gene that is essential in controlling the interactions between plants and microorganisms that enable them to establish intimate associations, which are of benefit to both partners. Published in the... view more (2002-06-26)

New model revises estimates of terrestrial carbon dioxide uptake
Researchers at the University of Illinois have developed a new model of global carbon and nitrogen cycling that will fundamentally transform the understanding of how plants and soils interact with a changing atmosphere and climate.   view more (2007-12-12)

Nitrogen - the silent species eliminator
Nitrogen pollution from agriculture and fossil fuels is known to be seriously damaging grasslands in the UK. A new European study is starting to show that the effect is Europe-wide, confirming that current policies to protect ecosystems may need a re-think.   view more (2007-10-15)

Hold your breath; Plants may absorb less carbon dioxide than we thought
The world's land plants will probably not be able to absorb as great a share of the rising atmospheric carbon dioxide as some models have predicted.   view more (2006-04-13)

An invisible threat could change Britain's landscapes
People and farm animals are helping an invisible pollutant to change the types of plants that grow in Britain, particularly in remote and rural regions such as the Lake District.   view more (2005-02-11)

Small streams mitigate human influence on coastal ecosystems
Healthy streams play a major role in minimizing the amount of human-generated pollutants, such as nitrogen, that are delivered downstream.   view more (2008-03-13)

Acid Soils in Slovakia Tell Somber Tale
Increasing levels of nitrogen deposition associated with industry and agriculture can drive soils toward a toxic level of acidification, reducing plant growth and polluting surface waters, according to a new study published online in Nature Geoscience.   view more (2008-11-18)

UMCES-led research team quantifies nutrient pollution reductions from urban stream restoration
A team of researchers led by University of Maryland Center for Environmental Science researcher Dr. Sujay Kaushal has been among the first able to quantify the amount of excess nitrogen removed from an urban stream during environmental restoration projects.   view more (2008-05-01)

Ruminating cows receive digestive aid
Scientists at the Institute of Grassland and Environmental Research are developing new plant breeding techniques which can improve the efficiency of cow digestion and reduce pollution at the same time. Grass isn't the easiest food to digest, and even cows appear to have difficulty doing it... view more (2004-04-01)

Nitrogen study may improve ecological predictions
The pattern of nitrogen release from decaying plant material is remarkably similar and predictable across the planet, researchers have concluded in a new study, which should make it easier to understand nutrient dynamics, vegetation growth, estimate carbon release and sequestration, and better... view more (2007-01-19)

Higher carbon dioxide, lack of nitrogen limit plant growth
Earth's plant life will not be able to "store" excess carbon from rising atmospheric carbon dioxide levels as well as scientists once thought because plants likely cannot get enough nutrients, such as nitrogen, when there are higher levels of carbon dioxide   view more (2006-04-13)

Air pollution may increase lung cancer risk
Chronic air pollution may increase the risk of lung cancer, suggests a Norwegian study of over 16,000 men in Thorax. Researchers monitored the health of 16, 209 men from 1972 until 1998. The men, all of whom lived in Oslo, were taking part in long term research on risk factors for heart disease and... view more (2003-12-03)

At the root of nutrient limitation, ecosystems are not as different as they seem
Anyone who has thrown a backyard barbecue knows that hot dogs are inexplicably packaged in different numbers than buns - eight hot dogs per pack versus 10 hot dog buns. Put in ecological terms, this means that weenie roasts are "hot-dog limited" - the extra buns are worthless without hot... view more (2007-11-09)

Some plants may compensate for herbivore damage by stimulating nutrient release in the soil
Browsing by mammals often has a serious impact on the growth of tree saplings and the regeneration of forests. However, there is much uncertainty with regard to effects on soil nutrient cycling and in turn, potential consequences for the growth of plants. In a paper to be published in the June... view more (2004-05-13)

Potassium limitation, ammonium toxicity and amino acid excretion in yeast
As a single-celled eukaryote organism, the yeast strain S. cerevisiae has some limitations in terms of how it can be used as a model for more complex multicellular eukaryotes.   view more (2006-10-17)
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