Persistent eutrophication and hypoxia in the coastal ocean

Cambridge Prisms Coastal Futures, Год журнала: 2023, Номер 1

Опубликована: Янв. 1, 2023

Abstract Coastal eutrophication and hypoxia remain a persistent environmental crisis despite the great efforts to reduce nutrient loading mitigate associated damages. Symptoms of this have appeared spread rapidly, reaching developing countries in Asia with emergences Southern America Africa. The pace changes underlying drivers not so clear. To address gap, we review up-to-date status mechanisms global coastal oceans, upon which examine trajectories over 40 years or longer six model systems varying socio-economic development statuses different levels histories eutrophication. Although these share common features eutrophication, site-specific characteristics are also substantial, depending on regional setting level social-economic along policy implementation management. Nevertheless, ecosystem recovery generally needs greater reduction pressures compared that initiated degradation becomes less feasible achieve past norms time anthropogenic ecosystems. While qualitative causality between consequences is well established, quantitative attribution remains difficult especially when consider social economic because ecosystems subject multiple influences cause–effect relationship often non-linear. Such relationships further complicated by climate been accelerating few decades. knowledge gaps limit our mechanistic understanding human-coastal ocean nexus identified, essential for science-based making. Recognizing lessons from management practices, advocate better, more efficient indexing system an advanced earth modeling framework optimal modules human dimensions facilitate evaluation effective restoration actions.

Язык: Английский

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Enhancing phosphorus source apportionment in watersheds through species-specific analysis

Water Research, Год журнала: 2024, Номер 253, С. 121262 - 121262

Опубликована: Фев. 7, 2024

Язык: Английский

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Spatiotemporal variation characteristics of sediment nutrient load from the soil erosion of the Yangtze River Basin of China from 1901 to 2010

Ecological Indicators, Год журнала: 2023, Номер 150, С. 110206 - 110206

Опубликована: Апрель 6, 2023

Over the past 70 years, Yangtze River Basin-the third longest river basin in world-has been under influence of augmented human activities. Regarding environmental protection and policy design, total nitrogen phosphorus (TN TP, respectively) loads from soil erosion are objectively quantitatively critical parameters while assessing spatio-temporal changes over 1901–2010 period. First, our study area was calculated using Revised Universal Soil Loss Equation (RUSLE) model. Second, TN TP were assessed constructed Nutrient Empirical Model (NLEM). Third, we conducted spatial autocorrelation analysis, Mann-Kendall (M–K) trend tests, wavelet analysis erosion, related loads. At Datong Station period, average annual 1.77 0.56 million tonnes, respectively. Moran's I values indicates existence positive correlations, clustering prevailing distribution pattern. High-high (H-H) cluster areas mainly evident high-altitude region western southern Basin, conversely, low-low (L-L) scattered primarily regions with high population density intense increased rapidly around 2001; hence, 2001 a changing point. According to M–K test, time intersection at 1990; 1990 may have point, likely due operation Gezhouba Dam during 1981-1986. This trapped large amounts sediments. If sediment load data control hydrological station 12 sub-basins is available, SDR, load, AN AP calculation could be more accurate interpretable.

Язык: Английский

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Transport dynamics of watershed discharged diffuse phosphorus pollution load to the lake in middle of Yangtze River Basin

Environmental Pollution, Год журнала: 2024, Номер 344, С. 123221 - 123221

Опубликована: Янв. 14, 2024

Язык: Английский

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Spatio-temporal evolution mechanism and dynamic simulation of nitrogen and phosphorus pollution of the Yangtze River Economic Belt in China

Environmental Pollution, Год журнала: 2024, Номер 357, С. 124402 - 124402

Опубликована: Июнь 19, 2024

Язык: Английский

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Increasing cascade dams in the upstream area reduce nutrient inputs to the Three Gorges Reservoir in China

The Science of The Total Environment, Год журнала: 2024, Номер 926, С. 171683 - 171683

Опубликована: Март 15, 2024

Язык: Английский

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A novel framework to improve the consistency of water quality attribution from natural and anthropogenic factors

Journal of Environmental Management, Год журнала: 2023, Номер 342, С. 118077 - 118077

Опубликована: Май 18, 2023

Язык: Английский

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Evaluating the Heterogeneous Effects of On-Site Scientist-Government Collaboration on Yangtze River Protection and Restoration Using Causal Machine Learning

Journal of Cleaner Production, Год журнала: 2025, Номер unknown, С. 144913 - 144913

Опубликована: Янв. 1, 2025

Язык: Английский

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Decoupling the effects of climate, topography, land use, revegetation, and dam construction on streamflow, sediment, total nitrogen and phosphorus in the Yangtze River Basin

The Science of The Total Environment, Год журнала: 2025, Номер 968, С. 178800 - 178800

Опубликована: Фев. 18, 2025

Язык: Английский

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Phosphorus trends and hot spots—a spatio-temporal data analysis of phosphorus derived from Everglades Agricultural Area (EAA) farms (Florida, USA)

Environmental Monitoring and Assessment, Год журнала: 2025, Номер 197(4)

Опубликована: Март 13, 2025

The Everglades Agricultural Area (EAA) in South Florida (USA) is a recognized source of total phosphorus (TP) that has impacted downstream oligotrophic marshes. Treatment wetlands, called stormwater treatment areas (STAs), were constructed and subsequently expanded to remediate EAA-derived TP, ideally yielding long-term outflow concentrations the Protection (EvPA) 13 µg/L TP or less. To date, TP-remediation been insufficient relative loads discharged from some EAA basins. We assessed 20 years basin-level farm-level concentration data with goal understanding trends over time identifying hot spots. Using monitoring water year (WY) 2000 through WY 2019, farms averaged 74.68 ± 38.87 was as high 269.38 µg/L. identified spatial temporal variations concentration, farm outflow, load, flow-weighted mean farms. basins showed presence decreasing trend between 2012 increasing for more recent period 2010 2019. nine-parameter Analytic Hierarchy Process (AHP), we observed 31% posed above-average pollution risk, including 22 S-5A 17 S-6 These spot are primary candidate sites targeted interventions aimed at reducing runoff, alleviating burden on STAs, offsetting trend.

Язык: Английский

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