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Latest Eutrophication Stories

2009-10-28 10:58:03

Understanding phosphorus cycling is essential for managing modern wetlands Phosphorus is an essential element in production agriculture, however fertilizer runoff and wastewater discharge have led to massive eutrophication problems in water bodies worldwide. Many researchers believe such contamination is at least partly responsible for offshore "dead zones," such as the expansive area found in the Gulf of Mexico. While wetlands often act as filtering or storage systems for nutrients,...

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2009-10-19 14:18:14

Eutrophication of the seas may have an impact on genetic variation in algae, research at the University of Gothenburg shows. Phytoplankton provide the basis for the whole marine food chain. These microscopic organisms are common in coastal areas, all the way from the polar regions to the Equator, and multiply through cell division. If cells are present in the water mass in large numbers an algal blood develops - a recurrent problem in Swedish seas and along Swedish coasts. Causes of algal...

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2009-08-11 09:50:00

Hypoxia, or lack of oxygen, in bottom waters is a well known environmental problem. New research at the University of Gothenburg, Sweden adds to the list of ill effects: hypoxia leads to increased levels of manganese, which damages the immune response in marine animals.Water eutrophication and the resulting hypoxia is an ever-current issue, not least in connection with summer algal blooms. A more recently acknowledged problem is that hypoxia, which occurs when algae is broken down, increases...

2009-07-07 11:06:54

Biologists know that when plants battle for sNitrogen research shows how some plants invade, take over otherspace, often the actual battle is for getting the nitrogen.Now, research at the University of Nebraska-Lincoln gives important new information on how plants can change "nitrogen cycling" to gain nitrogen and how this allows plant species to invade and take over native plants.In an article published July 6 in the scientific journal Proceedings of the National Academy of Sciences, UNL...

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2009-06-18 15:49:15

Synthetic fertilizers have dramatically increased food production worldwide. But the unintended costs to the environment and human health have been substantial. Nitrogen runoff from farms has contaminated surface and groundwater and helped create massive "dead zones" in coastal areas, such as the Gulf of Mexico. And ammonia from fertilized cropland has become a major source of air pollution, while emissions of nitrous oxide form a potent greenhouse gas. These and other negative environmental...

2009-05-27 11:16:49

Most polluted or damaged ecosystems worldwide can recover within a lifetime if societies commit to their cleanup or restoration, according to an analysis of 240 independent studies by researchers at the Yale School of Forestry & Environmental Studies. Their findings will appear in the June edition of the journal PLoS ONE. The Yale researchers found that forest ecosystems recovered in 42 years on average, while ocean bottoms recovered in less than 10 years. When examined by disturbance...

2009-05-18 10:34:31

A U.S. scientist urges that equal attention be given to phosphorus and nitrogen produced by human activity that are degrading water quality and aquatic life. University of North Carolina at Chapel Hill Professor Hans Paerl notes the priority has historically been given to controlling phosphorus. But Paerl argues nitrogen imbalance is equally damaging and a dual nutrient strategy is necessary to manage the problem effectively. The combination of human population growth, urbanization and...

2009-05-18 10:43:42

New study argues need for dual nutrient strategy to improve aquatic ecosystemsExcess phosphorus and nitrogen produced by human activities on neighboring land is making its way into our coastal waters and degrading both water quality and aquatic life. Although historically the priority has been to control phosphorus, Professor Hans Paerl, from the University of North Carolina in the US, argues that nitrogen imbalance is equally damaging. He adds that a dual nutrient strategy "“ tackling...

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2009-05-07 06:42:09

The origin of the massive green tide of algae that nearly wrecked the Beijing Olympics sailing regatta has been discovered by scientists, BBC news reported Wednesday.  Satellite images divulge evidence that swift development of farmed seaweed nearly 200km down the coast is the cause for the colossal algal bloom. As the green tide drifted closer to the regatta city of Qingdao, it multiplied in size, so much so that it is regarded the largest ever recorded in the entire world.  It...

2009-02-20 10:46:33

Protecting drinking water and preventing harmful coastal "dead zones", as well as eutrophication in many lakes, will require reducing both nitrogen and phosphorus pollution. Because streams and rivers are conduits to the sea, management strategies should be implemented along the land-to-ocean continuum. In most cases, strategies that focus only on one nutrient will fail.These policy recommendations were put forth by a team of distinguished scientists in the recent issue of Science, published...


Word of the Day
cruet
  • A vial or small glass bottle, especially one for holding vinegar, oil, etc.; a caster for liquids.
This word is Middle English in origin, and ultimately comes from the Old French, diminutive of 'crue,' flask.
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