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.
Climate change is starving the Arctic Ocean of essential nutrients, with the region's six largest rivers now delivering far less of the type of nitrogen that marine ecosystems need to survive, according to new research in ...
Earth Sciences
Aug 4, 2025
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138
A new study published in Nature Geoscience has revealed that the global ocean's chemical makeup is undergoing a transformation, with key nutrient ratios critical to marine life shifting away from the long-accepted Redfield ...
Earth Sciences
Jul 21, 2025
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50
An effective measure to fight nutrient deficiency is to increase the nutrient content of food, particularly staples that are cheap to produce and widely consumed. Scientists do this by breeding crop varieties that are higher ...
Agriculture
Jul 17, 2025
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29
Wheat contains many valuable nutrients—and can help to make a diet with bread even healthier. However, the nutrient content depends on the type of wheat. A rapid test method could help to increase the nutrient content of ...
Agriculture
Jul 1, 2025
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26
NOAA is forecasting this summer's Gulf of America (formerly Gulf of Mexico) "dead zone" to be average-sized, covering approximately 5,574 square miles—an area roughly three times the size of Delaware. The dead zone, or hypoxic ...
Environment
Jun 12, 2025
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72
Excessive nutrients in wastewater can lead to detrimental discharges into natural water bodies, prompting harmful algal blooms with severe environmental and economic repercussions. To address this pressing issue, a team of ...
Bio & Medicine
Jun 11, 2025
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79
Along with nutrients like nitrogen and phosphorus, iron is essential for the growth of microscopic phytoplankton in the ocean. However, a new study led by oceanographers at the University of Hawaii'i (UH) at Mānoa revealed ...
Earth Sciences
Jun 2, 2025
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67
Coastal communities and marine wildlife could benefit from improved monitoring of nutrient pollution in UK waters, according to new research involving scientists at the University of Plymouth.
Environment
May 21, 2025
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20
At the uppermost reaches of stream networks, headwaters dry up during the summer, then burst back into existence when spring brings rain. These nonperennial headwater streams are individually small, but collectively, they ...
Earth Sciences
Apr 15, 2025
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22
