Articles tagged with Nitrogen Deposition
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A landmark review published by FAU reveals that sargassum is a rapidly growing and widely distributed marine organism. The study found that the Atlantic Ocean's sargassum biomass has increased by over 50% since the 1980s, with nitrogen content rising sharply.
Increased nitrogen deposition from human activity is reducing diversity and evolutionary distinctiveness of nitrogen-fixing plants. The loss of these plants threatens both biodiversity and ecosystem stability, according to a study published in Science Advances.
New research reveals nitrogen pollution as primary driver of westward shifts in European forest plant distribution. High levels of atmospheric nitrogen deposition allow rapid spread of nitrogen-tolerant species, often at expense of specialized plant species.
A new study published in Nature Ecology & Evolution found that warmer temperatures and nitrogen fertilization can stabilize soil carbon levels, contradicting earlier predictions. Plant roots and growth add new carbon to the soil, counteracting the loss of carbon due to climate change.
A Dartmouth-led study found that air pollution from fossil fuels reaches the remote Arctic, altering its fundamental atmospheric chemistry. The researchers detected declines in methanesulfonic acid, a biomarker linked to phytoplankton productivity, which plummeted in environments high in emissions.
A study from Chalmers University of Technology found that the production and use of ammonia as a marine fuel can lead to eutrophication, acidification, and emissions of potent greenhouse gases. Researchers warn that the pursuit of low-carbon fuels may create new environmental challenges.
Researchers at the University of Houston have discovered that microalgae can be used to sequester carbon dioxide and convert it into mass-produced proteins, lipids, and carbohydrates. This process has the potential to transform food production, treat wastewater, and produce sustainable biofuels.
A UH-led research team has developed a cost-effective method for removing harmful chemicals and heavy metals from coastal waters by utilizing native aquatic plants. The system, which includes floating aquatic plants and synthetic mats, can help restore ecological balance and keep communities healthy.
A new study analyzed state nutrient reduction strategies and found that initial energy and inclusive planning processes were key to success. Emphasizing local water body impacts was more motivating than distant goals, and addressing scale challenges is crucial for significant results.
Researchers found that wetter pre-growing seasons reduced soil nitrogen through leaching, but applying more fertilizer can mitigate this effect. The model also showed that cold pre-growing season temperatures limited early growth in ways that affected yield potential, making extra fertilizer less effective.
A new study published in the Proceedings of the National Academy of Sciences found that the ecological impact of invasive species alone is comparable to its combined effect with warming temperatures, drought, or nitrogen deposition. This suggests that managing invasive species at a local level can make ecosystems more climate resilient.
The regional coupled C-N-H2O cycle involves regional transport and transformation processes, biogeochemical C-N-H2O processes, and interactions between elements at the terrestrial-atmosphere and terrestrial-freshwater interfaces. Climate change impacts the cycle by driving nutrient cycling, primary productivity, and abiotic processes.
Researchers found that reducing ammonia emissions alone may not significantly decrease reduced forms of nitrogen deposition, which can still drop by only 60-80% despite abatement efforts. The study suggests a more comprehensive approach to mitigate nitrogen pollution is needed.
A new research study led by Miss Yu Yan Yau and Dr Benoit Thibodeau from the University of Hong Kong found that reducing fossil fuel combustion can significantly decrease hypoxic zones in Chinese coastal seas, with the South China Sea being the most sensitive area to nitrogen input
Recent studies challenge traditional approaches to understanding air pollution impacts by highlighting the importance of dry deposition processes, particularly ammonia. Ammonia plays a vital role in nitrogen deposition and haze pollution, with global concentrations increasing worldwide over recent decades.
The study estimated nitrogen deposition in northern China using a combination of remote sensing data and atmospheric chemical transport model simulations, revealing an average flux of 54.5 kg N per hectare. This represents 10% of the annual nitrogen application for winter wheat-summer maize rotation in the region.
Researchers used moss (Haplocladium microphyllum) to monitor N deposition rates and sources in the Yangtze River Delta. They found a significant linear relationship between moss N content and wet N deposition rate, with decreasing trends from urban to rural areas.
A recent study found that the Tianjin Port explosion significantly increased atmospheric nitrogen deposition in the Bohai Sea, with a 308.49 micromole N increase per square meter per day. The study suggests that the impact area of the explosion on the Bohai Sea is approximately 1/5 of its total area.
Researchers report a three-fold increase in atmospheric iodine deposition since 1950 due to increased oceanic emissions driven by enhanced ozone levels from nitrogen oxide emissions. The French Alps' summer iodine concentrations tripled between 1950 and 1995, consistent with chemical transport model simulations.
Current regional nitrogen deposition in the Congo Basin significantly exceeds previously simulated low deposition rates. Annual savannah biomass burning is likely responsible for elevated deposition rates, according to a recent study.
A recent study found significant correlations between East Asian dust events and chlorophyll a concentration in the North Pacific Ocean and Chinese marginal seas. Dust fertilization on marine biological productivity was also observed, with phytoplankton growth related to dust deposition in the Yellow Sea.
New research from Colorado State University finds that agricultural ammonia emissions now surpass fossil fuel combustion emissions as the dominant source of nitrogen cycle disturbance. Excess nitrogen in the atmosphere causes environmental impacts such as soil acidification and decreased biodiversity.
Scientists studied over 15,000 sites across the US, finding nitrogen deposition exceeded critical loads for loss of plant species richness in 24 percent. The study highlights the impact of atmospheric nitrogen deposition on ecosystems, with effects more pronounced in acidic soils and dry climates.
Researchers found that human activities contribute far less nitrogen to the open ocean than previously thought. The study suggests that the ocean plays a substantial role in recycling organic nitrogen, reducing the impact of nitrogen pollution on the carbon cycle.
Researchers found a negative relation between atmospheric nitrogen emissions and plant diversity in Switzerland, with a 19% loss in phylogenetic diversity. High nitrogen deposition favors few highly competitive species, leading to decreased overall plant diversity.
A recent study revealed a significant increase in anthropogenic nitrate levels in the North Pacific Ocean over the past 30 years, primarily due to enhanced atmospheric deposition. This shift in nutrient availability may favor certain marine organisms and alter the base of the marine food web.
Researchers find that US national parks are experiencing 'accidental fertilization' at or above critical thresholds due to nitrogen compounds carried on the wind. The team predicts significant increases in agricultural land and fertilizer use by 2050, requiring a 55% reduction of anthropogenic NH3 emissions.
A new study reveals that China's nitrogen emissions increased by 60% annually from the 1980s to 2000s, leading to decreased air quality, acidification of soil and water, and reduced biological diversity. The country's rapid industrialization and agricultural expansion are major contributors to this pollution problem.
A new study reveals that acid rain's impact on Great Lakes sugar maples goes beyond soil acidification. Excess nitrogen from acid rain slows microbial decay of dead leaves, creating a physical barrier for seedlings. This mechanism is expected to worsen as nitrogen deposition increases by the end of the century.
Excess nitrogen levels in air and water pose significant threats to human health, including respiratory problems and cancer risk. Nitrogen pollution also exacerbates climate change, but reducing it could lessen these impacts.
A study published in Science reveals that airborne nitrogen from fossil fuels and fertilizers affects alpine lakes, altering the balance of phosphorus and nitrogen. This shift limits phytoplankton growth, affecting food webs and potentially biodiversity.
A new study published in Nature Geoscience reveals the devastating impact of increased nitrogen deposition on Slovakian soil acidity, compromising plant fertility and surface water quality. Researchers warn that many soils are already susceptible to this process due to decades of human-influenced pollution.
A new study suggests that human-caused nitrogen deposition is indirectly fertilizing forests, increasing their growth and sequestering major amounts of carbon. The findings reveal a more complex view of the carbon cycle in forests, heavily influenced by human activities.
The US exports nitrogen pollution beyond its borders, with most deposits found near their sources. The study estimates that the US loses track of nearly 6 million metric tons of nitrogen emissions each year, which are possibly transported to Western Europe.
New studies reveal a significant decline in UK species diversity, with insects, plants, and birds showing declines of up to 70% over 20 years. The findings support the 'Sixth Extinction' hypothesis and highlight the need for environmental policies to mitigate the effects of human activity.
Researchers found that mountainous areas can receive dramatically different amounts of pollutants and excess nutrients, creating 'hotspots' with high ecological sensitivity. The study suggests that estimates of atmospheric deposition must take into account complex mountain landscapes, elevations, aspect, and vegetation type.