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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The seas around China in a warming climate

Nature Reviews Earth & Environment, Год журнала: 2023, Номер 4(8), С. 535 - 551

Опубликована: Июль 18, 2023

Язык: Английский

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Shift in algal blooms from micro‐ to macroalgae around China with increasing eutrophication and climate change

Global Change Biology, Год журнала: 2023, Номер 30(1)

Опубликована: Ноя. 8, 2023

Abstract Blooms of microalgal red tides and macroalgae (e.g., green golden caused by Ulva Sargassum ) have widespread problems around China in recent years, but there is uncertainty what triggers these blooms how they interact. Here, we use 30 years monitoring data to help answer questions, focusing on the four main species microalgae Prorocentrum donghaiense , Karenia mikimotoi Noctiluca scintillans Skeletonema costatum associated with region. The frequency increased from 1991 2003 then decreased until 2020, S. exhibiting highest rate decrease. Green started occur 1999 has since been increase. Golden were first reported 2012. macroalgal a negative linear relationship coverage China, positive correlation total nitrogen phosphorus loads as well atmospheric CO 2 sea surface temperature (SST). Increased outbreaks are very likely due worsening levels eutrophication, combined rising SST, which contribute reduced tides. increasing grazing microzooplankton also results decline areas affected This study shows clear shift algal over past driven combination climate change, stress, indicating fundamental change coastal systems

Язык: Английский

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Hindcasting harmful algal bloom risk due to land-based nutrient pollution in the Eastern Chinese coastal seas

Water Research, Год журнала: 2023, Номер 231, С. 119669 - 119669

Опубликована: Янв. 26, 2023

Язык: Английский

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Spatio-temporal distribution of harmful algal blooms and their correlations with marine hydrological elements in offshore areas, China

Ocean & Coastal Management, Год журнала: 2023, Номер 238, С. 106554 - 106554

Опубликована: Март 10, 2023

Язык: Английский

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Harmful Algal Blooms in Eutrophic Marine Environments: Causes, Monitoring, and Treatment

Water, Год журнала: 2024, Номер 16(17), С. 2525 - 2525

Опубликована: Сен. 5, 2024

Marine eutrophication, primarily driven by nutrient over input from agricultural runoff, wastewater discharge, and atmospheric deposition, leads to harmful algal blooms (HABs) that pose a severe threat marine ecosystems. This review explores the causes, monitoring methods, control strategies for eutrophication in environments. Monitoring techniques include remote sensing, automated situ sensors, modeling, forecasting, metagenomics. Remote sensing provides large-scale temporal spatial data, while sensors offer real-time, high-resolution monitoring. Modeling forecasting use historical data environmental variables predict blooms, metagenomics insights into microbial community dynamics. Control treatments encompass physical, chemical, biological treatments, as well advanced technologies like nanotechnology, electrocoagulation, ultrasonic treatment. Physical such aeration mixing, are effective but costly energy-intensive. Chemical including phosphorus precipitation, quickly reduce levels may have ecological side effects. Biological biomanipulation bioaugmentation, sustainable require careful management of interactions. Advanced innovative solutions with varying costs sustainability profiles. Comparing these methods highlights trade-offs between efficacy, cost, impact, emphasizing need integrated approaches tailored specific conditions. underscores importance combining mitigate adverse effects on

Язык: Английский

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Microbiomes of bloom-forming Phaeocystis algae are stable and consistently recruited, with both symbiotic and opportunistic modes

The ISME Journal, Год журнала: 2022, Номер 16(9), С. 2255 - 2264

Опубликована: Июнь 28, 2022

Язык: Английский

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Phytoplankton community and HAB species in the South China Sea detected by morphological and metabarcoding approaches

Harmful Algae, Год журнала: 2022, Номер 118, С. 102297 - 102297

Опубликована: Авг. 10, 2022

Язык: Английский

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Trends in nutrients in the Changjiang River

The Science of The Total Environment, Год журнала: 2023, Номер 872, С. 162268 - 162268

Опубликована: Фев. 16, 2023

Язык: Английский

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Soil erosion on arable land: An unresolved global environmental threat

Progress in Physical Geography Earth and Environment, Год журнала: 2023, Номер 48(1), С. 136 - 161

Опубликована: Ноя. 24, 2023

Rationale and scope: Although soil erosion was recognised as a serious problem in antiquity research into started the early 20th century, it remains substantial for agriculture environment across globe. It disrupts agricultural production, threatening food increases severity of floods droughts impacts on biology biogeochemical cycling. This review describes different processes manifestations arable land availability global data. points out that while there is good understanding erosion, causes are complex even if agronomic landscape solutions available, their implementation challenging needs tailored approaches to account specific local socio-economic, political, institutional contexts.

Язык: Английский

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