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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Mitigating eutrophication and toxic cyanobacterial blooms in large lakes: The evolution of a dual nutrient (N and P) reduction paradigm

Hydrobiologia, Journal Year: 2019, Volume and Issue: 847(21), P. 4359 - 4375

Published: Oct. 29, 2019

Language: Английский

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Contributions of external nutrient loading and internal cycling to cyanobacterial bloom dynamics in Lake Taihu, China: Implications for nutrient management

Limnology and Oceanography, Journal Year: 2021, Volume and Issue: 66(4), P. 1492 - 1509

Published: Feb. 4, 2021

Abstract Harmful cyanobacterial blooms (CyanoHABs) are linked to increasing anthropogenic nitrogen (N) and phosphorus (P) inputs. However, CyanoHABs in many large lakes continue despite extensive abatement efforts, mostly focused on external P loading. Internal nutrient cycling can modify availability limitation; thus, understanding the relative importance of vs. internal loading is essential for developing effective mitigation strategies CyanoHABs. We estimated long‐term budgets Lake Taihu, China, from mass balance models using monitoring input output data 2005 2018 quantify contributions The showed that 9% 63% annual N inputs, respectively, were retained lake. Denitrification removed 54% thus help explain rapid decreases lake concentrations summer limitation. Water column regeneration sustain over short term contributed 38–58% potential demand summer‐fall, Microcystis ‐dominated blooms. release 23–90% demand, although Taihu was a net sink an scale. Our results show helps reductions Furthermore, leaving faster than P, thereby creating persistent Therefore, parallel loading, along with will be most reducing accelerate recovery process this other large, shallow lakes.

Language: Английский

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Short-term Lake Erie algal bloom prediction by classification and regression models

Water Research, Journal Year: 2023, Volume and Issue: 232, P. 119710 - 119710

Published: Feb. 5, 2023

Language: Английский

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Cyanobacterial community succession and associated cyanotoxin production in hypereutrophic and eutrophic freshwaters

Environmental Pollution, Journal Year: 2021, Volume and Issue: 290, P. 118056 - 118056

Published: Aug. 27, 2021

Language: Английский

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Nutrients and not temperature are the key drivers for cyanobacterial biomass in the Americas

Harmful Algae, Journal Year: 2022, Volume and Issue: 121, P. 102367 - 102367

Published: Dec. 16, 2022

Language: Английский

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Climate change and the aquatic continuum: A cyanobacterial comeback story

Environmental Microbiology Reports, Journal Year: 2022, Volume and Issue: 15(1), P. 3 - 12

Published: Sept. 12, 2022

Billions of years ago, the Earth's waters were dominated by cyanobacteria. These microbes amassed to such formidable numbers, they ushered in a new era-starting with Great Oxidation Event-fuelled oxygenic photosynthesis. Throughout following eon, cyanobacteria ceded portions their global aerobic power photoautotrophs rise eukaryotes (i.e. algae and higher plants), which co-existed aquatic ecosystems. Yet while cyanobacteria's ecological success story is one most notorious within our planet's biogeochemical history, scientists this day still seek unlock secrets triumph. Now, Anthropocene has era fuelled excessive nutrient inputs greenhouse gas emissions, are again reshaping biomes. In response, we experiencing an increase cyanobacterial bloom distribution, duration, frequency, leading unbalanced, many instances degraded, A critical component resurgence freshwater-marine continuum: serves transport blooms, toxins produce, on premise that "water flows downhill". Here, identify drivers contributing comeback discuss future implications context environmental human health along continuum. This Minireview addresses overlooked problem freshwater marine continuum effects nutrients toxic blooms moving these waters. Marine research have historically been conducted isolation independently another. Yet, approach fails account for interchangeable transit biology through between systems, phenomenon becoming major around globe. highlights what know challenges lie ahead.

Language: Английский

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Patterns in sources and forms of nitrogen in a large eutrophic lake during a cyanobacterial harmful algal bloom

Limnology and Oceanography, Journal Year: 2023, Volume and Issue: 68(4), P. 803 - 815

Published: Feb. 2, 2023

Abstract Western Lake Erie experiences an annual, toxic cyanobacterial harmful algal bloom (cyanoHAB), primarily caused by excess anthropogenic inputs of nitrogen (N) and phosphorous (P) . Because the non‐N fixing cyanobacteria species Microcystis dominates these blooms, N availability is hypothesized to play a central role in cyanoHAB progression, as well production N‐rich toxin microcystin. Many previous studies focused on nitrate because it most abundant substrate during initiation. However, recent work implicated reduced substrates like ammonium dissolved organic (DON) promoting greater biomass longevity. To examine relative importance oxidized phytoplankton different stages, we measured concentrations natural abundance δ 15 isotope values throughout entirety 2020 Erie. The results provide first data DON dynamics composition Erie, suggest that phytoplankton, including , likely relied regenerated from pool later stages. In addition, stable confirm delivered via Maumee River growth production.

Language: Английский

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Hydrology and water quality evaluation for potential HABs under future climate scenarios

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 374, P. 124033 - 124033

Published: Jan. 8, 2025

Language: Английский

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The effect of single versus dual nutrient decreases on phytoplankton growth rates, community composition, and Microcystin concentration in the western basin of Lake Erie

Harmful Algae, Journal Year: 2023, Volume and Issue: 123, P. 102382 - 102382

Published: Jan. 17, 2023

Language: Английский

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