Eutrophication: A new wine in an old bottle?

The Science of The Total Environment, Journal Year: 2018, Volume and Issue: 651, P. 1 - 11

Published: Sept. 13, 2018

Language: Английский

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Nutrients, eutrophication and harmful algal blooms along the freshwater to marine continuum

Wiley Interdisciplinary Reviews Water, Journal Year: 2019, Volume and Issue: 6(5)

Published: Aug. 15, 2019

Abstract Agricultural, urban and industrial activities have dramatically increased aquatic nitrogen phosphorus pollution (eutrophication), threatening water quality biotic integrity from headwater streams to coastal areas world‐wide. Eutrophication creates multiple problems, including hypoxic “dead zones” that reduce fish shellfish production; harmful algal blooms create taste odor problems threaten the safety of drinking food supplies; stimulation greenhouse gas releases; degradation cultural social values these waters. Conservative estimates annual costs eutrophication indicated $1 billion losses for European waters $2.4 lakes in United States. Scientists debated whether phosphorus, nitrogen, or both need be reduced control along freshwater marine continuum, but many management agencies worldwide are increasingly opting dual control. The unidirectional flow nutrients through streams, rivers, lakes, estuaries ultimately oceans adds additional complexity, as each ecosystems may limited by different factors. Consequently, reduction just one nutrient upstream can allow export other downstream where they stimulate production. technology exists controlling eutrophication, challenges remain understanding managing this global environmental problem. This article is categorized under: Science Water > Quality Life Stresses Pressures on Ecosystems

Language: Английский

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River dam impacts on biogeochemical cycling

Nature Reviews Earth & Environment, Journal Year: 2020, Volume and Issue: 1(2), P. 103 - 116

Published: Feb. 3, 2020

Language: Английский

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Fertilizers and nitrate pollution of surface and ground water: an increasingly pervasive global problem

SN Applied Sciences, Journal Year: 2021, Volume and Issue: 3(4)

Published: March 31, 2021

Abstract Nitrate pollution of ground and surface water bodies all over the world is generally linked with continually increasing global fertilizer nitrogen (N) use. But after 1990, more N consumption in developing countries especially East South Asia than industrialized nations North America Europe, nitrate freshwaters now increasingly becoming a pervasive problem. In this review it has been attempted to research information generated during last two decades from on different aspects natural bodies. It evident that not 50% directly used by crops which applied. While small portion may leach down reach bodies, large proportion ends up soil organic pool where mineralized taken plants and/or lost via leaching several decades. Present trends freshwaters, therefore, reflect legacies current past applications fertilizers manures. Tools such as simulation models variation stable isotopes oxygen are being extensively study contribution other sources enrichment freshwaters. Impacts agricultural stewardship measures assessed managed using modern digital frameworks. Improved management agroecosystems can reduce but host factors determine magnitude. Future needs also considered.

Language: Английский

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Water Depth Underpins the Relative Roles and Fates of Nitrogen and Phosphorus in Lakes

Environmental Science & Technology, Journal Year: 2020, Volume and Issue: 54(6), P. 3191 - 3198

Published: Feb. 19, 2020

Eutrophication mitigation is an ongoing priority for aquatic ecosystems. However, the current eutrophication control strategies (phosphorus (P) and/or nitrogen (N)) are guided mainly by nutrient addition experiments in small waters without encompassing all in-lake biogeochemical processes that associated largely with lake morphological characteristics. Here, we use a global data set (573 lakes) to show relative roles of N vs P affecting underpinned water depth. Mean depth and maximum mixing were used distinguish shallow (mixing > depth), deep < mean transitional (mean ≤ depth) lakes this study. TN/TP ratio (by mass) was as indicator potential limitation, i.e., only limitation if N/P 9, + colimitation 9 22.6, ≥ 22.6. The results favored lakes, frequently (66.2%) while predominated (94.4%) most but especially ones. importance increases decreases trophic status occurs primarily (59.4%) eutrophic lakes. These demonstrate phosphorus reduction can mitigate large dual may be needed ones (or bays). Our analysis helps clarify long debate over whether N, P, or both primary production. While these imply more resources invested management, given high costs pollution reduction, comprehensive from carefully designed at different scales further verify modification existing paradigm.

Language: Английский

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The Globalization of Cultural Eutrophication in the Coastal Ocean: Causes and Consequences

Frontiers in Marine Science, Journal Year: 2020, Volume and Issue: 7

Published: Aug. 17, 2020

Coastal eutrophication caused by anthropogenic nutrient inputs is one of the greatest threats to health coastal estuarine and marine ecosystems worldwide. To better understand manage this threat, we compared six contrasting that are subjected a range riverine freshwater (buoyancy) nutrients address (i) impacts on ecosystem services; (ii) how traits minimize or amplify these impacts; (iii) synergies among pressures (nutrient enrichment, over fishing, development, climate-driven in particular); (iv) management ecosystems. Globally, ~ 24% N released watersheds estimated reach Our comparative assessment revealed terms spatial extent habitat degradation, Chesapeake Bay ranks number followed rank order northern Gulf Mexico, Baltic Sea, Great Barrier Reef, East China Sea Adriatic Sea; increases loading are, will continue be, exacerbated with other including development sea surface temperature, acidification rainfall; when defined quantitative ranges primary production, trophic status not useful for relating impacts. While managed reductions point source from sewage treatment plants increasingly successful, controlling diffuse sources remains challenging problem. Thus, it likely severity increase absence effectively enforced, ecosystem-based both nitrogen phosphorus. This requires sustained, integrated research monitoring, as well repeated assessments These must be informed guided ongoing collaborations scientists, politicians, managers public.

Language: Английский

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Mitigating the Expansion of Harmful Algal Blooms Across the Freshwater-to-Marine Continuum

Environmental Science & Technology, Journal Year: 2018, Volume and Issue: 52(10), P. 5519 - 5529

Published: April 16, 2018

Anthropogenic nutrient overenrichment, coupled with rising temperatures, and an increasing frequency of extreme hydrologic events (storms droughts) are accelerating eutrophication promoting the expansion harmful algal blooms (HABs) across freshwater-to-marine continuum. All HABs—with a focus here on cyanobacterial blooms—pose serious consequences for water supplies, fisheries, recreational uses, tourism, property values. As loads grow in watersheds, they begin to compound effects legacy stores. This has led paradigm shift our understanding how nutrients control blooms. Phosphorus (P) reductions have been traditionally prescribed exclusively freshwater systems, while nitrogen (N) were mainly stressed brackish coastal waters. However, because most systems hydrologically interconnected, single (e.g., P only) upstream may not necessarily reduce HAB impacts downstream. Reducing both N inputs is only viable management solution long-term HABs along article highlights where paired physical, chemical, or biological controls improve beneficial uses short term, offers strategies that should be enacted watershed scales combat global geographically broad continua.

Language: Английский

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Decline in Chinese lake phosphorus concentration accompanied by shift in sources since 2006

Nature Geoscience, Journal Year: 2017, Volume and Issue: 10(7), P. 507 - 511

Published: June 12, 2017

Language: Английский

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Mechanisms driving phosphorus release during algal blooms based on hourly changes in iron and phosphorus concentrations in sediments

Water Research, Journal Year: 2018, Volume and Issue: 133, P. 153 - 164

Published: Jan. 18, 2018

Language: Английский

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Internal phosphorus loading from sediments causes seasonal nitrogen limitation for harmful algal blooms

The Science of The Total Environment, Journal Year: 2018, Volume and Issue: 625, P. 872 - 884

Published: Jan. 4, 2018

Language: Английский

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