Marine water quality refers to the physicochemical, biological, and microbiological status of seawater as characterized by quantitative indicators relevant to ecosystem function, contaminant exposure, and regulatory standards. It encompasses parameters such as nutrient concentrations (e.g., nitrogen, phosphorus), dissolved oxygen, salinity, temperature, pH, turbidity, organic matter, trace metals, hydrocarbons, persistent organic pollutants, and microbial/pathogen loads. Assessment of marine water quality underpins evaluations of eutrophication, hypoxia, harmful algal blooms, contaminant bioavailability, and ecological risk. It is central to monitoring programs, environmental impact assessments, and management frameworks such as marine protected areas and coastal zone management, often integrating in situ measurements, remote sensing, and modeling.
The health of the Chesapeake Bay declined in an annual report card on the nation's largest estuary released Tuesday, with scientists noting the effect of extreme rainfall patterns during the hottest year on record.
Environment
Jun 10, 2025
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Despite being considered sanctuaries for biodiversity, Brazil's marine protected areas (MPAs) are not immune to microplastic contamination.
Environment
May 22, 2025
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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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Coastal waters around the world are increasingly losing oxygen, with dramatic consequences for both ecosystems and the people who depend on them. The Baltic Sea is a well-known example: with the consequences of spreading ...
Earth Sciences
May 6, 2025
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Have you ever thought about what would happen if all life in the ocean disappeared? A recent study explores this extreme scenario to understand how ocean biology shapes the past, present, and future climate.
Earth Sciences
May 5, 2025
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A team of ocean optics experts, led by Plymouth Marine Laboratory, has evaluated the accuracy of above-water optical sensors, using a community-developed processor, to produce the highest-quality data for satellite ocean ...
Earth Sciences
May 2, 2025
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Research led by the Spanish Institute of Oceanography (IEO-CSIC), with the participation of the Universitat Autònoma de Barcelona and the Institute of Marine Sciences (ICM-CSIC), has reconstructed the history of pollution ...
Earth Sciences
Apr 28, 2025
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The amount of marine life off north-east Greenland could expand by more than a quarter, according to new research.
Earth Sciences
Apr 24, 2025
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The Isle of Man government has said it is "fully committed to environmental protection and transparency" regarding its Unesco biosphere status—despite admitting that legacy landfill sites are discharging hazardous chemical ...
Environment
Apr 22, 2025
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A worryingly wide range of chemical pollutants has been found by researchers studying two of the U.K.'s south-coast harbors, raising concerns about the impact on wildlife and the human activities responsible for this contamination.
Environment
Apr 7, 2025
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