Nutrient content (water) in the context of environmental and water science topics refers to the concentration and speciation of dissolved and particulate nutrients—primarily nitrogen (e.g., nitrate, nitrite, ammonium, dissolved organic nitrogen) and phosphorus (e.g., orthophosphate, dissolved and particulate organic phosphorus), as well as ancillary elements such as silica—within freshwater, marine, or wastewater systems. It is quantitatively assessed using chemical and sometimes bioassay methods to characterize trophic status, evaluate eutrophication risk, model biogeochemical cycles, and inform regulatory standards for water quality, ecological health, and resource management.
When the Lincoln Memorial Reflecting Pool turned green with algae just days after a US$15 million renovation, the U.S. government scrambled for chemicals and expensive technical solutions to fix the iconic landmark.
Environment
Jun 26, 2026
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324
Freshwater ecosystems worldwide have been suffering from declining oxygen levels—a trend known as deoxygenation—that threatens biodiversity, fisheries and ecosystem stability. However, a new study published in Nature Geoscience ...
Earth Sciences
Jun 26, 2026
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54
As the United States approaches its 250th birthday celebrations on July 4, Washington, DC's monuments, statues and fountains are being prepared to put on a show.
Bio & Medicine
Jun 24, 2026
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20
One of the most powerful environmental cleaning technologies in recent years is too small to see with the naked eye. Nanobubbles—tiny gaseous bubbles with diameters of around 100 nanometers—can clean up a range of harmful ...
Environment
Jun 19, 2026
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107
Nitrate pollution is a growing global environmental challenge due to the extensive use of fertilizer. A study published in Science, led by the Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB) with the Helmholtz ...
Earth Sciences
Jun 12, 2026
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8
As toxic algal blooms intensify around the world, a renowned Bowling Green State University researcher continues to lead the global conversation on how to prevent them, keeping the university and its Center for Great Lakes ...
Ecology
Jun 11, 2026
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33
Hannah Ray J Childs propelled her kayak into a rapid on Iowa's Maquoketa River on a recent afternoon and dipped her paddle in the water to swing the front of her boat into the air.
Environment
Jun 4, 2026
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11
Algal blooms can seem to appear overnight. A stretch of ocean that looked clear days earlier can suddenly appear discolored and sometimes pose risks to ecosystems and human health. But scientists say blooms are rarely sudden—understanding ...
Environment
Jun 3, 2026
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44
Municipalities and federal agencies monitor U.S. waters for microcystins, a toxin produced by harmful algal blooms in Lake Erie, but a University of Michigan study shows that the blooms produce a greater range of potentially ...
Environment
May 27, 2026
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32
Tile drainage is common in U.S. Midwest agricultural fields, helping to remove excess water and aerate the soil. While the practice enhances crop productivity, it can cause phosphorus to leak into nearby waterways, where ...
Agriculture
May 13, 2026
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