Persistent eutrophication and hypoxia in the coastal ocean

Cambridge Prisms Coastal Futures, Journal Year: 2023, Volume and Issue: 1

Published: Jan. 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.

Language: Английский

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The seas around China in a warming climate

Nature Reviews Earth & Environment, Journal Year: 2023, Volume and Issue: 4(8), P. 535 - 551

Published: July 18, 2023

Language: Английский

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

Global Change Biology, Journal Year: 2023, Volume and Issue: 30(1)

Published: Nov. 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

Language: Английский

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

Water Research, Journal Year: 2023, Volume and Issue: 231, P. 119669 - 119669

Published: Jan. 26, 2023

Language: 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, Journal Year: 2023, Volume and Issue: 238, P. 106554 - 106554

Published: March 10, 2023

Language: Английский

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

Water, Journal Year: 2024, Volume and Issue: 16(17), P. 2525 - 2525

Published: Sept. 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

Language: 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, Journal Year: 2022, Volume and Issue: 16(9), P. 2255 - 2264

Published: June 28, 2022

Language: Английский

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

Harmful Algae, Journal Year: 2022, Volume and Issue: 118, P. 102297 - 102297

Published: Aug. 10, 2022

Language: Английский

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Trends in nutrients in the Changjiang River

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 872, P. 162268 - 162268

Published: Feb. 16, 2023

Language: Английский

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Long-Term Harmful Algal Blooms and Nutrients Patterns Affected by Climate Change and Anthropogenic Pressures in the Zhanjiang Bay, China

Frontiers in Marine Science, Journal Year: 2022, Volume and Issue: 9

Published: April 4, 2022

Climate change and anthropogenic pressures have significantly affected coastal environments. This study obtained historical data on harmful algal blooms (HABs) nutrient patterns over a 30-year period to explore responses long-term climate pressure indicators. Although the surrounding area has achieved great economic success past 30 years, Zhanjiang Bay (ZJB) been seriously by various pollutants is threatened increasing eutrophication HABs due pressures. In ZJB, rarely occurred before 1980s but periodically frequently since 2000s. The largest HAB covered cumulative of 310 km 2 in 2005. Most during spring. Additionally, dominant phytoplankton species were Skeletonema costatum Phaeocystis globosa , accounting for 37.50 43.75% observed, respectively. Anthropogenic caused regime increased ZJB three decades ( P < 0.05). Specifically, concentration dissolved inorganic nitrogen (DIN) threefold from beginning 1990 2019 period, while phosphorus (DIP) 21-fold. Unsynchronized variation led changes composition nutrients, ecosystem shifted P-limited oligotrophic state 2000s an N-limited eutrophic state. indicators showed significant linear correlation with nutrients 0.05), did not play direct role problem this > Therefore, integrated land-ocean environment management should be introduced reduce land-based pollution sources, mitigate eutrophication, curb algae ZJB.

Language: Английский

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