Routine monitoring of western Lake Erie to track water quality changes associated with cyanobacterial harmful algal blooms

Earth system science data, Journal Year: 2023, Volume and Issue: 15(8), P. 3853 - 3868

Published: Aug. 25, 2023

Abstract. The western basin of Lake Erie has a history recurrent cyanobacterial harmful algal blooms (HABs) despite decades efforts by the United States and Canada to limit phosphorus loading, major driver blooms. In response, National Oceanic Atmospheric Administration (NOAA) Great Lakes Environmental Research Laboratory (GLERL) Cooperative Institute for (CIGLR) created an annual sampling program detect, monitor, assess, predict HABs in (WLE). Here we describe data collected from this monitoring 2012 2021. This dataset includes observations on physicochemical properties, nutrient fractions, phytoplankton pigments, microcystins, optical properties Erie. is particularly relevant creating models, verifying calibrating remote sensing algorithms, informing experimental research further understand water quality dynamics that influence internationally significant body freshwater. can be freely accessed NOAA Centers Information (NCEI) at https://doi.org/10.25921/11da-3x54 (Cooperative Research, University Michigan Laboratory, 2019).

Language: Английский

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Lake browning counteracts cyanobacteria responses to nutrients: Evidence from phytoplankton dynamics in large enclosure experiments and comprehensive observational data

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

Published: Nov. 22, 2023

Abstract Lakes worldwide are affected by multiple stressors, including climate change. This includes massive loading of both nutrients and humic substances to lakes during extreme weather events, which also may disrupt thermal stratification. Since multi‐stressor effects vary widely in space time, their combined ecological impacts remain difficult predict. Therefore, we two consecutive large enclosure experiments with a comprehensive time‐series broad‐scale field survey unravel the storm‐induced lake browning, nutrient enrichment deep mixing on phytoplankton communities, focusing particularly potentially toxic cyanobacterial blooms. The experimental results revealed that browning counteracted stimulating effect caused shift from phototrophic cyanobacteria chlorophytes mixotrophic cryptophytes. Light limitation was identified as likely mechanism underlying this response. Deep‐mixing increased microcystin concentrations clear nutrient‐enriched enclosures, upwelling metalimnetic Planktothrix rubescens population. Monitoring data 25‐year eutrophic 588 northern European corroborate results: Browning suppresses terms biovolume proportion total biovolume. Both observational indicated lower phosphorus threshold for bloom development clearwater (10–20 μg P L −1 ) than (20–30 ). finding provides management guidance receiving more due frequent events.

Language: Английский

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How phoD-harboring functional microbial populations trigger the release risk of phosphorus in water sediment system of Shijiuhu Lake, China after experiencing the transseasonal shift

Water Research, Journal Year: 2023, Volume and Issue: 240, P. 120107 - 120107

Published: May 21, 2023

Language: Английский

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Spatio-temporal connectivity of the aquatic microbiome associated with cyanobacterial blooms along a Great Lake riverine-lacustrine continuum

Frontiers in Microbiology, Journal Year: 2023, Volume and Issue: 14

Published: Feb. 9, 2023

Lake Erie is subject to recurring events of cyanobacterial harmful algal blooms (cHABs), but measures nutrients and total phytoplankton biomass seem be poor predictors cHABs when taken individually. A more integrated approach at the watershed scale may improve our understanding conditions that lead bloom formation, such as assessing physico-chemical biological factors influence lake microbial community, well identifying linkages between surrounding watershed. Within scope Government Canada’s Genomics Research Development Initiative (GRDI) Ecobiomics project, we used high-throughput sequencing 16S rRNA gene characterize spatio-temporal variability aquatic microbiome in Thames River–Lake St. Clair-Detroit corridor. We found was structured along flow path influenced mainly by higher nutrient concentrations River, temperature pH downstream Clair Erie. The same dominant bacterial phyla were detected water continuum, changing only relative abundance. At finer taxonomical level, however, there a clear shift with Planktothrix dominating River Microcystis Synechococcus Mantel correlations highlighted importance geographic distance shaping community structure. fact high proportion sequences Western Basin also identified indicated degree connectivity dispersal within system, where mass effect induced passive transport play an important role assembly. Nevertheless, some amplicon sequence variants (ASVs) related , representing less than 0.1% abundance upstream became Erie, suggesting selection those ASVs based on conditions. Their extremely low abundances suggest additional sources are likely contribute rapid development summer fall Collectively, these results, which can applied other watersheds, influencing assembly provide new perspectives how better understand occurrence elsewhere.

Language: Английский

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Modeling temporal and spatial variations of biogeochemical processes in a large subtropical lake: Assessing alternative solutions to algal blooms in Lake Okeechobee, Florida

Journal of Hydrology Regional Studies, Journal Year: 2023, Volume and Issue: 47, P. 101441 - 101441

Published: June 1, 2023

Algal blooms (ABs), often exacerbated by excess nutrients from anthropogenic activities, can pose serious risks to public health, fisheries, and ecosystem structure functions. Lake Okeechobee is located in southcentral Florida (USA), with a surface area of 1730 km2, it the largest subtropical lake United States. This shallow, nutrient-rich, subject frequent intense cyanobacteria, some which are toxic. In this study, three-dimensional (3D) model was developed, coupling long-term monitoring data complex physical, chemical, ecological processes at fine spatial (15–1000 m horizontal mesh size) temporal (1 h) resolution. We used understand influence environmental factors nutrient management on ABs dynamics Okeechobee. The showed that mostly developed shallow nearshore regions near canal outlets, then spread over as result prevailing winds currents. Hypothetical scenario modeling reducing both nitrogen phosphorus inputs 50%–75% would be more effective than targeting single nutrient. could tool assess effectiveness different strategies its watershed, while framework adopted other large water bodies facing similar issues.

Language: Английский

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Chemodiversity of Cyanobacterial Toxins Driven by Future Scenarios of Climate Warming and Eutrophication

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(32), P. 11767 - 11778

Published: Aug. 3, 2023

Climate change and eutrophication are two environmental threats that can alter the structure of freshwater ecosystems their service functions, but we know little about how ecosystem function will evolve in future scenarios climate warming. Therefore, created different experimental scenarios, including present-day conditions, a 3.0 °C increase mean temperature, "heatwaves" scenario (i.e., an temperature variability) to assess effects on phytoplankton communities under simultaneous stress from herbicides. We show warming, particularly heatwaves, associated with elevated cyanobacterial abundances toxin production, driven by mainly nontoxic toxic Microcystis spp. The reason for higher concentrations is likely because dual pressures warming individual toxin-producing ability decreased. Eutrophication temperatures significantly increased biomass Microcystis, leading concentrations. In contrast, alone did not produce or due depletion available nutrient pool. Similarly, herbicide glyphosate affect any taxa. case enrichment, were much than strong boost potential producers. From broader perspective our study shows warmer climate, loading has be reduced if dominance controlled.

Language: Английский

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Comparative genomic analysis and functional investigations for MCs catabolism mechanisms and evolutionary dynamics of MCs-degrading bacteria in ecology

Environmental Research, Journal Year: 2024, Volume and Issue: 248, P. 118336 - 118336

Published: Jan. 29, 2024

Language: Английский

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How do seasonal temperature variations influence interplay between toxic and non-toxic cyanobacterial blooms? Evidence from modeling and experimental data

Harmful Algae, Journal Year: 2024, Volume and Issue: 134, P. 102606 - 102606

Published: March 13, 2024

Summer cyanobacterial blooms exhibit a dynamic interplay between toxic and non-toxic genotypes, significantly influencing the cyanotoxin levels within lake. The challenge lies in accurately predicting these toxin concentrations due to significant temporal fluctuations proportions of genotypes. Typically, genotypes dominate during early late summer periods, while variants prevail mid-summer. To dissect this phenomenon, we propose model that accounts for competitive interaction as well seasonal temperature variations. Our numerical simulations suggest optimal is lower than temperatures counterparts. This difference may potentially contribute explain dominance at situation often observed field. Experimental data from laboratory align qualitatively with our simulation results, enabling better understanding complex interplays cyanobacteria.

Language: Английский

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Schindler's legacy: from eutrophic lakes to the phosphorus utilization strategies of cyanobacteria

FEMS Microbiology Reviews, Journal Year: 2022, Volume and Issue: 46(6)

Published: June 24, 2022

Abstract David Schindler and his colleagues pioneered studies in the 1970s on role of phosphorus stimulating cyanobacterial blooms North American lakes. Our understanding nuances utilization by cyanobacteria has evolved since that time. We review strategies used cyanobacteria, such as use organic forms, alternation between passive active uptake, luxury storage. While many aspects physiological responses to have been measured, our critical processes drive species diversity, adaptation competition remains limited. identify persistent knowledge gaps, particularly low nutrient concentrations. propose traditional discipline-specific be adapted expanded encompass innovative new methodologies take advantage interdisciplinary opportunities among physiologists, molecular biologists, modellers, advance prediction toxic ultimately mitigate occurrence blooms.

Language: Английский

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Heterotrophic Bacteria Dominate Catalase Expression during Microcystis Blooms

Applied and Environmental Microbiology, Journal Year: 2022, Volume and Issue: 88(14)

Published: July 5, 2022

In the oligotrophic oceans, key autotrophs depend on "helper" bacteria to reduce oxidative stress from hydrogen peroxide (H2O2) in extracellular environment. H2O2 is also a ubiquitous stressor freshwaters, but effects of and their interactions with are less well understood freshwaters. Naturally occurring freshwater systems proposed impact proportion microcystin-producing (toxic) non-microcystin-producing (nontoxic) Microcystis blooms, which influences toxin concentrations human health impacts. However, how different strains respond naturally microbes responsible for decomposition cyanobacterial blooms unknown. To address these knowledge gaps, we used metagenomics metatranscriptomics track presence expression genes by during bloom western Lake Erie summer 2014. katG encodes enzyme decomposing was absent most cells. transcript relative abundance dominated heterotrophic bacteria. axenic cultures, an scavenger (pyruvate) significantly improved growth rates one toxic strain while other nontoxic were unaffected. These results indicate that play role suggest activity may affect fitness some thus composition not along versus dichotomy. IMPORTANCE Cyanobacterial harmful algal (CHABs) threaten ecosystems globally through production toxins. Toxin species CHABs varies widely over time space, ecological drivers succession toxin-producing remain unclear. Hydrogen natural waters, inhibits microbial growth, determine proportions blooms. mechanisms organismal involved unexplored CHABs. This study shows bloom-forming cyanobacteria benefit detoxification associated bacteria, development.

Language: Английский

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