Blooms also like it cold

Limnology and Oceanography Letters, Journal Year: 2023, Volume and Issue: 8(4), P. 546 - 564

Published: Feb. 17, 2023

Abstract Cyanobacterial blooms have substantial direct and indirect negative impacts on freshwater ecosystems including releasing toxins, blocking light needed by other organisms, depleting oxygen. There is growing concern over the potential for climate change to promote cyanobacterial blooms, as positive effects of increasing lake surface temperature growth are well documented in literature; however, there evidence that also being initiated persisting relatively cold‐water temperatures (< 15°C), ice‐covered conditions. In this work, we provide review abiotic drivers physiological adaptations leading these offer a typology lesser‐studied discuss their occurrence under changing

Language: Английский

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Satellite remote sensing to assess cyanobacterial bloom frequency across the United States at multiple spatial scales

Ecological Indicators, Journal Year: 2021, Volume and Issue: 128, P. 107822 - 107822

Published: May 26, 2021

Cyanobacterial blooms can have negative effects on human health and local ecosystems. Field monitoring of cyanobacterial be costly, but satellite remote sensing has shown utility for more efficient spatial temporal across the United States. Here, imagery was used to assess annual frequency surface blooms, defined each pixel as percentage images that throughout year exhibiting detectable cyanobacteria. assessed 2,196 large lakes in 46 states continental States (CONUS) using from European Space Agency's Ocean Land Colour Instrument years 2017 through 2019. In 2019, all pixels considered, bloom had a median value 4% maximum 100%, latter indicating those pixels, detected by sensor every image considered. addition pixel-scale frequency, results were summarized at lake- state-scales averaging lake state. For average lake-scale frequencies also Oregon Ohio highest state-scale 65% 52%. Pixel-scale assist identifying portions are prone while prioritization sampling resources mitigation efforts. Satellite is limited presence snow ice, collected these conditions quality flagged discarded. Thus, within nine climate regions investigated determine whether missing data biased given their summaries would weighted toward summer months when tend occur. Results unbiased time period selected most regions, bias observed Northwest Rockies Plains region. Moderate biases Valley Southeast regions. Finally, clustering analysis identify areas high low CONUS based Several clusters identified transcended state, watershed, eco-regional boundaries. Combined with additional data, may offer insight regarding large-scale drivers blooms.

Language: Английский

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A Review of Common Cyanotoxins and Their Effects on Fish

Toxics, Journal Year: 2023, Volume and Issue: 11(2), P. 118 - 118

Published: Jan. 25, 2023

Global warming and human-induced eutrophication drive the occurrence of various cyanotoxins in aquatic environments. These metabolites reveal diversified mechanisms action, encompassing cyto-, neuro-, hepato-, nephro-, neurotoxicity, pose a threat to biota human health. In present paper, we review data on most studied cyanotoxins, microcystins, nodularins, cylindrospermopsin, anatoxins, saxitoxins, environment, as well their potential bioaccumulation toxicity fish. Microcystins are among all known although other toxic cyanobacterial also commonly identified environments can high Except for primary signs, adversely affect antioxidant system anti-/pro-oxidant balance. Cyanotoxins negatively impact mitochondrial endoplasmic reticulum by increasing intracellular reactive oxygen species. Furthermore, fish exposed microcystins cylindrospermopsin exhibit immunomodulatory, inflammatory, endocrine responses. Even though exert complex pressure fish, numerous aspects yet be subject in-depth investigation. Metabolites than should more thoroughly understand long-term effects provide robust background monitoring management actions.

Language: Английский

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Quantifying national and regional cyanobacterial occurrence in US lakes using satellite remote sensing

Ecological Indicators, Journal Year: 2019, Volume and Issue: 111, P. 105976 - 105976

Published: Dec. 25, 2019

Cyanobacterial harmful algal blooms are the most common form of in freshwater systems throughout world. However,

Language: Английский

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Hot moments and hotspots of cyanobacteria hyperblooms in the Curonian Lagoon (SE Baltic Sea) revealed via remote sensing-based retrospective analysis

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 769, P. 145053 - 145053

Published: Jan. 11, 2021

Language: Английский

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A tale of two blooms: do ecological paradigms for algal bloom success and succession require revisiting?

Journal of Great Lakes Research, Journal Year: 2024, Volume and Issue: 50(3), P. 102336 - 102336

Published: April 1, 2024

Lake Erie algal bloom discussions have historically focused on cyanobacteria, with foundational "blooms like it hot" and "high nutrient" paradigms considered as primary drivers behind cyanobacterial success. Yet, recent surveys rediscovered winter-spring diatom blooms, introducing another key player in the eutrophication story which has been overlooked. These blooms (summer vs. winter) treated solitary events separated by spatial temporal gradients. However, new evidence suggests they may not be so isolated, linked a manner that manifests an cycle. Equally notable are emerging reports of cold and/or oligotrophic freshwaters, interpreted some shifts classical paradigms. led many to ask "what is bloom?". Furthermore, questioning classic caused others wonder if we overlooking additional factors constrain In light data ideas, revisited concepts within context derived five take-aways: 1) Additional bloom-formers (diatoms) need included discussions, 2) The term "bloom" must reinforced clear definition quantitative metrics for each event, 3) Algal should studied solitarily, 4) Shifts physiochemical conditions serve alternative interpretation potential ecological paradigms, 5) success succession (i.e., pH light) require consideration.

Language: Английский

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Oxidative Stress, Programmed Cell Death and Microcystin Release in Microcystis aeruginosa in Response to Daphnia Grazers

Frontiers in Microbiology, Journal Year: 2020, Volume and Issue: 11

Published: June 17, 2020

There is increasing evidence that programmed cell death (PCD) in cyanobacteria triggered by oxidative stress and it contributes to the survival of cyanobacterial population such as Microcystis aeruginosa. At same time, microcystins (MCs) released during lysis have been implicated colony formation (enabled release polysaccharides) M. aeruginosa - a strategy allows effect stressor, including grazing be avoided or decreased. This experimental research has explored whether extracts Daphnia magna cucullata (corresponding 5, 25, 50, 100 individuals per liter) reveal on growth, intracellular reactive oxygen species (ROS) content, lipid peroxidation, PCD, MC-LR release, bound exopolysaccharide (EPS) level 7 days exposure. As demonstrated, both daphnids induced dose-dependent growth inhibition, increase ROS levels, PCD. Moreover, an EPS fraction were observed treated cultures. Generally, greatest effects under influence D. extracts. The study indicates grazer presence can potentially trigger series events population, with cells undergoing stress-induced PCD associated MC which turn increases production intact cells. argued, this likely evolved response abiotic stressors, since synthesis predate metazoan lineage. Nevertheless, may still provide benefit for MC-producing pressure.

Language: Английский

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Relationships between biomass of phytoplankton and submerged macrophytes and physicochemical variables of water in Lake Caohai, China: Implication for mitigation of cyanobacteria blooms by CO2 fertilization

Journal of Hydrology, Journal Year: 2023, Volume and Issue: 617, P. 129111 - 129111

Published: Jan. 10, 2023

Language: Английский

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Controlling toxic Microcystis blooms: The power of a novel microalgal predator Poteriospumella lacustris in water safety improvement

Journal of Cleaner Production, Journal Year: 2024, Volume and Issue: 441, P. 141011 - 141011

Published: Jan. 29, 2024

Language: Английский

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Assessing cyanobacterial frequency and abundance at surface waters near drinking water intakes across the United States

Water Research, Journal Year: 2021, Volume and Issue: 201, P. 117377 - 117377

Published: June 24, 2021

This study presents the first large-scale assessment of cyanobacterial frequency and abundance surface water near drinking intakes across United States. Public systems serve to nearly 90% States population. Cyanobacteria their toxins may degrade quality finished can lead negative health consequences. Satellite imagery as a cost-effective consistent monitoring technique for blooms in source waters provide treatment operators information managing systems. uses satellite from European Space Agency's Ocean Land Colour Instrument (OLCI) spanning June 2016 through April 2020. At 300-m spatial resolution, OLCI be used monitor cyanobacteria 685 sources 285 lakes 44 states, referred here resolvable sources. First, subset data was compared responses (n = 84) submitted part U.S. Environmental Protection fourth Unregulated Contaminant Monitoring Rule (UCMR 4). These UCMR 4 qualitative included visual observations algal bloom presence absence March 2018 November 2019. Overall agreement between 94% with Kappa coefficient 0.70. Next, temporal at all assessed. In 2019, averaged 2% peaked 100%, where 100% indicated always present when available. Monthly abundances were assess short-term trends effect size computed insight on number years that must obtained increase confidence an observed change. Generally, 2020 insufficient time period confidently observing changes these waters; average, decade would required environmental outweigh variability data. However, five did demonstrate sustained trend, one increasing four decreasing.

Language: Английский

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