1
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Vicentini M, Calado SLM, Pessati JBK, Perussolo MC, Lirola JR, Marcondes FR, Nascimento ND, Beghetto CL, Vilar MCP, Mela M, Coral LAA, Magalhães VF, Prodocimo V, Cestari MM, Silva de Assis HC. Temperature rise and its influence on the toxic effects caused by cyanotoxins in a neotropical catfish. Environ Pollut 2024; 353:124166. [PMID: 38754694 DOI: 10.1016/j.envpol.2024.124166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 05/12/2024] [Accepted: 05/13/2024] [Indexed: 05/18/2024]
Abstract
Potentially toxic cyanobacterial blooms (cyanoHABs) have become a problem in public water supply reservoirs. Temperature rise caused by climate change can increase the frequency and intensity of blooms, which may influence the cyanotoxins concentration in the environment. This study aimed to evaluate the effect of the temperature on the responses of a Neotropical catfish exposed to a neurotoxin-rich cyanobacterial crude extract (Raphidiopsis raciborskii T3). Juveniles of Rhamdia quelen were exposed to four treatments, based on study data: control at 25 °C (C25), control at 30 °C (C30), crude extract equivalent to 105 cells.mL-l of R. raciborskii at 25 °C (CE25) and 30 °C (CE30). After 96 h of exposure, the fish were anesthetized and blood was taken. After euthanasia, the gill, posterior kidney, brain, muscle, liver and gonad were sampled for hematological, biochemical, genotoxic and histopathological biomarker analysis. Liver was sampled for proteomic analysis for identification of proteins related to energy production. Water samples were collected at the beginning and the end of the experiment for neurotoxins quantification. Different parameters in both males and females were altered at CE25, evidencing the effects of neurotoxins in freshwater fish. At CE30, a water warming scenario, more effects were observed in females than at 25 °C, such as activation of saxitoxin metabolism pathway and genotoxicity. More damage to macromolecules was observed in females at the higher temperature, demonstrating that the increase in temperature can aggravate the toxicity of neurotoxins produced by R. raciborskii T3.
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Affiliation(s)
- Maiara Vicentini
- Post Graduation Program in Ecology and Conservation, Federal University of Paraná, Brazil
| | - Sabrina L M Calado
- Post Graduation Program in Ecology and Conservation, Federal University of Paraná, Brazil
| | | | - Maiara C Perussolo
- Pharmacology Department, Federal University of Paraná, Brazil; Pelé Pequeno Príncipe Research Institute, Brazil
| | | | | | | | - Camila L Beghetto
- Chemistry and Biology Department, Federal University of Technology - Paraná, Brazil
| | - Mauro C P Vilar
- Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Brazil
| | - Maritana Mela
- Cell Biology Department, Federal University of Paraná, Brazil
| | - Lucila A A Coral
- Chemistry and Biology Department, Federal University of Technology - Paraná, Brazil
| | - Valéria F Magalhães
- Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Brazil
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2
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Feng G, Cao J, Chen H, Meng XZ, Duan Z. Potential gap in understanding cyanoHABs: Light-dependent morphological variations in colonial cyanobacterium Microcystis. Harmful Algae 2024; 134:102622. [PMID: 38705618 DOI: 10.1016/j.hal.2024.102622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 03/01/2024] [Accepted: 03/20/2024] [Indexed: 05/07/2024]
Abstract
Colony formation is a crucial characteristic of Microcystis, a cyanobacterium known for causing cyanobacterial harmful algal blooms (cyanoHABs). It has been observed that as Microcystis colonies grow larger, they often become less densely packed, which correlates with a decrease in light penetration. The objective of this study was to investigate the effects of light limitation on the morphological variations in Microcystis, particularly in relation to the crowded cellular environment. The results indicated that when there was sufficient light (transmittance = 100 %) to support a growth rate of 0.11±0.01 day-1, a significant increase in colony size was found, from 466±15 μm to 1030±111 μm. However, under light limitation (transmittance = 50 % - 1 %) where the growth rate was lower than 0, there was no significant improvement in colony size. Microcystis in the light limitation groups exhibited a loose cell arrangement and even the presence of holes or pores within the colony, confirming the negative correlation between colony size and cell arrangement. This pattern is driven by regional differences in growth within the colony, as internal cells have a significantly lower frequency of division compared to peripheral cells, due to intra-colony self-shading (ICSS). The research demonstrates that Microcystis can adjust its cell arrangement to avoid excessive self-shading, which has implications for predicting and controlling cyanoHABs. These findings also contribute to the understanding of cyanobacterial variations and can potentially inform future research on the diverse phycosphere.
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Affiliation(s)
- Ganyu Feng
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China; College of Environment, Hohai University, 1 Xikang Road, Nanjing, Jiangsu 210098, China; Shanghai Institute of Pollution Control and Ecological Security, 1239 Siping Road, Shanghai 200092, China.
| | - Jun Cao
- National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Hohai University, 1 Xikang Road, Nanjing, Jiangsu 210098, China
| | - Huaimin Chen
- School of Materials Engineering, Changzhou Vocational Institute of Industry Technology, 28 Mingxinzhong Road, Changzhou 213164, China
| | - Xiang-Zhou Meng
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, 1239 Siping Road, Shanghai 200092, China
| | - Zhipeng Duan
- College of Environment, Hohai University, 1 Xikang Road, Nanjing, Jiangsu 210098, China
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3
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Murray JF, Lavery AM, Schaeffer BA, Seegers BN, Pennington AF, Hilborn ED, Boerger S, Runkle JD, Loftin K, Graham J, Stumpf R, Koch A, Backer L. Assessing the relationship between cyanobacterial blooms and respiratory-related hospital visits: Green bay, Wisconsin 2017-2019. Int J Hyg Environ Health 2024; 255:114272. [PMID: 37871346 DOI: 10.1016/j.ijheh.2023.114272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 09/25/2023] [Accepted: 10/04/2023] [Indexed: 10/25/2023]
Abstract
Potential acute and chronic human health effects associated with exposure to cyanobacteria and cyanotoxins, including respiratory symptoms, are an understudied public health concern. We examined the relationship between estimated cyanobacteria biomass and the frequency of respiratory-related hospital visits for residents living near Green Bay, Lake Michigan, Wisconsin during 2017-2019. Remote sensing data from the Cyanobacteria Assessment Network was used to approximate cyanobacteria exposure through creation of a metric for cyanobacteria chlorophyll-a (ChlBS). We obtained counts of hospital visits for asthma, wheezing, and allergic rhinitis from the Wisconsin Hospital Association for ZIP codes within a 3-mile radius of Green Bay. We analyzed weekly counts of hospital visits versus cyanobacteria, which was modelled as a continuous measure (ChlBS) or categorized according to World Health Organization's (WHO) alert levels using Poisson generalized linear models. Our data included 2743 individual hospital visits and 114 weeks of satellite derived cyanobacteria biomass indicator data. Peak values of ChlBS were observed between the months of June and October. Using the WHO alert levels, 60% of weeks were categorized as no risk, 19% as Vigilance Level, 15% as Alert Level 1, and 6% as Alert Level 2. In Poisson regression models adjusted for temperature, dewpoint, season, and year, there was no association between ChlBS and hospital visits (rate ratio [RR] [95% Confidence Interval (CI)] = 0.98 [0.77, 1.24]). There was also no consistent association between WHO alert level and hospital visits when adjusting for covariates (Vigilance Level: RR [95% CI] 0.88 [0.74, 1.05], Alert Level 1: 0.82 [0.67, 0.99], Alert Level 2: 0.98 [0.77, 1.24], compared to the reference no risk category). Our methodology and model provide a template for future studies that assess the association between cyanobacterial blooms and respiratory health.
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Affiliation(s)
- Jordan F Murray
- University of Wisconsin-Madison School of Medicine and Public Health, 610 Walnut St, Madison, WI, 53726, United States; Wisconsin Department of Health Services, 1 West Wilson St, Madison, WI, 53703, United States.
| | - Amy M Lavery
- Division of Environmental Health Science and Practice, National Center for Environmental Health, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, United States
| | - Blake A Schaeffer
- Environmental Protection Agency, Office of Research and Development, Research Triangle Park, NC, 27711, United States
| | - Bridget N Seegers
- GESTAR II, Morgan State University, Baltimore, MD, United States; Ocean Ecology Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States
| | - Audrey F Pennington
- Division of Environmental Health Science and Practice, National Center for Environmental Health, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, United States
| | - Elizabeth D Hilborn
- Environmental Protection Agency, Office of Research and Development, Research Triangle Park, NC, 27711, United States
| | - Savannah Boerger
- Oak Ridge Institute for Science and Education, 1299 Bethel Valley Rd, Oak Ridge, TN, 37830, United States
| | - Jennifer D Runkle
- North Carolina Institute for Climate Studies, North Carolina State University, The Cooperative Institute for Satellite Earth Systems Studies, NOAA National Centers for Environmental Information, 151 Patton Ave, Asheville, NC, 28801i, United States; Geological Survey, 1217 Biltmore Dr, Lawrence, KS, 66049, United States
| | - Keith Loftin
- U. S. Geological Survey, 1217 Biltmore Drive, Lawrence, KS, 66049, United States
| | - Jennifer Graham
- U.S. Geological Survey, 425 Jordan Road, Troy, NY, 12180, United States
| | - Richard Stumpf
- National Oceanic and Atmospheric Administration, National Centers for Coastal Ocean Science, 1305 East-West Highway Code N/SCI1, Silver Spring, MD, 20910, United States
| | - Amanda Koch
- Wisconsin Department of Health Services, 1 West Wilson St, Madison, WI, 53703, United States
| | - Lorraine Backer
- Division of Environmental Health Science and Practice, National Center for Environmental Health, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA, 30329, United States
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4
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Mishra S, Stumpf RP, Schaeffer BA, Werdell PJ. Recent changes in cyanobacteria algal bloom magnitude in large lakes across the contiguous United States. Sci Total Environ 2023; 897:165253. [PMID: 37394074 PMCID: PMC10835736 DOI: 10.1016/j.scitotenv.2023.165253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 06/25/2023] [Accepted: 06/29/2023] [Indexed: 07/04/2023]
Abstract
Cyanobacterial blooms in inland lakes produce large quantities of biomass that impact drinking water systems, recreation, and tourism and may produce toxins that can adversely affect public health. This study analyzed nine years of satellite-derived bloom records and compared how the bloom magnitude has changed from 2008-2011 to 2016-2020 in 1881 of the largest lakes across the contiguous United States (CONUS). We determined bloom magnitude each year as the spatio-temporal mean cyanobacteria biomass from May to October and in concentrations of chlorophyll-a. We found that bloom magnitude decreased in 465 (25 %) lakes in the 2016-2020 period. Conversely, there was an increase in bloom magnitude in only 81 lakes (4 %). Bloom magnitude either didn't change, or the observed change was in the uncertainty range in the majority of the lakes (n = 1335, 71 %). Above-normal wetness and normal or below-normal maximum temperature over the warm season may have caused the decrease in bloom magnitude in the eastern part of the CONUS in recent years. On the other hand, a hotter and dryer warm season in the western CONUS may have created an environment for increased algal biomass. While more lakes saw a decrease in bloom magnitude, the pattern was not monotonic over the CONUS. The variations in temporal changes in bloom magnitude within and across climatic regions depend on the interactions between land use land cover (LULC) and physical factors such as temperature and precipitation. Despite expectations suggested by recent global studies, bloom magnitude has not increased in larger US lakes over this time period.
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Affiliation(s)
- Sachidananda Mishra
- Consolidated Safety Services Inc., Fairfax, VA 22030, USA; National Oceanic and Atmospheric Administration, National Centers for Coastal Ocean Science, Silver Spring, MD 20910, USA.
| | - Richard P Stumpf
- National Oceanic and Atmospheric Administration, National Centers for Coastal Ocean Science, Silver Spring, MD 20910, USA
| | - Blake A Schaeffer
- U.S. Environmental Protection Agency, Office of Research and Development, Durham, NC 27709, USA
| | - P Jeremy Werdell
- Ocean Ecology Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
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5
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Yancey CE, Kiledal EA, Chaganti SR, Denef VJ, Errera RM, Evans JT, Hart LN, Isailovic D, James WS, Kharbush JJ, Kimbrel JA, Li W, Mayali X, Nitschky H, Polik CA, Powers MA, Premathilaka SH, Rappuhn NA, Reitz LA, Rivera SR, Zwiers CC, Dick GJ. The Western Lake Erie culture collection: A promising resource for evaluating the physiological and genetic diversity of Microcystis and its associated microbiome. Harmful Algae 2023; 126:102440. [PMID: 37290887 DOI: 10.1016/j.hal.2023.102440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 04/24/2023] [Accepted: 04/28/2023] [Indexed: 06/10/2023]
Abstract
Cyanobacterial harmful algal blooms (cyanoHABs) dominated by Microcystis spp. have significant public health and economic implications in freshwater bodies around the world. These blooms are capable of producing a variety of cyanotoxins, including microcystins, that affect fishing and tourism industries, human and environmental health, and access to drinking water. In this study, we isolated and sequenced the genomes of 21 primarily unialgal Microcystis cultures collected from western Lake Erie between 2017 and 2019. While some cultures isolated in different years have a high degree of genetic similarity (genomic Average Nucleotide Identity >99%), genomic data show that these cultures also represent much of the breadth of known Microcystis diversity in natural populations. Only five isolates contained all the genes required for microcystin biosynthesis while two isolates contained a previously described partial mcy operon. Microcystin production within cultures was also assessed using Enzyme-Linked Immunosorbent Assay (ELISA) and supported genomic results with high concentrations (up to 900 μg L⁻¹) in cultures with complete mcy operons and no or low toxin detected otherwise. These xenic cultures also contained a substantial diversity of bacteria associated with Microcystis, which has become increasingly recognized as an essential component of cyanoHAB community dynamics. These results highlight the genomic diversity among Microcystis strains and associated bacteria in Lake Erie, and their potential impacts on bloom development, toxin production, and toxin degradation. This culture collection significantly increases the availability of environmentally relevant Microcystis strains from temperate North America.
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Affiliation(s)
- Colleen E Yancey
- Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, United States of America
| | - E Anders Kiledal
- Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, United States of America
| | - Subba Rao Chaganti
- Cooperative Institute for Great Lakes Research (CIGLR), University of Michigan, 4840 S State Road, Ann Arbor, MI 48108, United States of America
| | - Vincent J Denef
- Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109, United States of America
| | - Reagan M Errera
- National Oceanic and Atmospheric Administration (NOAA), Great Lakes Environmental Research Laboratory (GLERL), 4840 S State Road, Ann Arbor, MI 48108, United States of America
| | - Jacob T Evans
- Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109, United States of America
| | - Lauren N Hart
- Program in Chemical Biology, University of Michigan, Ann Arbor, MI 48109, United States of America; Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, United States of America
| | - Dragan Isailovic
- Department of Chemistry and Biochemistry, University of Toledo, Toledo, OH 43606, United States of America
| | - William S James
- Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, United States of America
| | - Jenan J Kharbush
- Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, United States of America
| | - Jeffrey A Kimbrel
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA 94550, United States of America
| | - Wei Li
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA 94550, United States of America
| | - Xavier Mayali
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA 94550, United States of America
| | - Helena Nitschky
- Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, United States of America
| | - Catherine A Polik
- Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, United States of America
| | - McKenzie A Powers
- Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, United States of America
| | - Sanduni H Premathilaka
- Department of Chemistry and Biochemistry, University of Toledo, Toledo, OH 43606, United States of America
| | - Nicole A Rappuhn
- Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, United States of America
| | - Laura A Reitz
- Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, United States of America
| | - Sara R Rivera
- Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, United States of America
| | - Claire C Zwiers
- Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, United States of America
| | - Gregory J Dick
- Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109, United States of America; Cooperative Institute for Great Lakes Research (CIGLR), University of Michigan, 4840 S State Road, Ann Arbor, MI 48108, United States of America.
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6
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Yancey CE, Mathiesen O, Dick GJ. Transcriptionally active nitrogen fixation and biosynthesis of diverse secondary metabolites by Dolichospermum and Aphanizomenon-like Cyanobacteria in western Lake Erie Microcystis blooms. Harmful Algae 2023; 124:102408. [PMID: 37164563 DOI: 10.1016/j.hal.2023.102408] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 02/15/2023] [Accepted: 02/17/2023] [Indexed: 05/12/2023]
Abstract
Cyanobacterial harmful algal blooms (cyanoHABs) in the western basin of Lake Erie are dominated by microcystin producing Microcystis spp., but other cyanobacterial taxa that coexist in these communities may play important roles in production of toxins and shaping bloom dynamics and community function. In this study, we used metagenomic and metatranscriptomic data from the 2014 western Lake Erie cyanoHAB to explore the genetic diversity and biosynthetic potential of cyanobacteria belonging to the Anabaena, Dolichospermum, Aphanizomenon (ADA) clade. We reconstructed two near-complete metagenome-assembled genomes from two distinct ADA clade species, each containing biosynthetic gene clusters that encode novel and known secondary metabolites, including those with toxic and/or known taste and odor properties, that were transcriptionally active. However, neither ADA metagenome-assembled genome contained genes encoding guanitoxins, anatoxins, or saxitoxins, which are known to be produced by ADA. The ADA cyanobacteria accounted for most of the metagenomic and metatranscriptomic reads from nitrogen fixation genes, suggesting they were the dominant N-fixers at the times and stations sampled. Despite their relatively low abundance, our results highlight the possibility that ADA taxa could influence the water quality and ecology of Microcystis blooms, although the extent of these impacts remains to be quantified.
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Affiliation(s)
- Colleen E Yancey
- Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, 48109, USA
| | - Olivia Mathiesen
- Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, 48109, USA
| | - Gregory J Dick
- Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, 48109, USA; Cooperative Institute for Great Lakes Research (CIGLR), University of Michigan, 4840 South State Road, Ann Arbor, MI 48108 USA.
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7
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Li H, Qin C, He W, Sun F, Du P. Learning and inferring the diurnal variability of cyanobacterial blooms from high-frequency time-series satellite-based observations. Harmful Algae 2023; 123:102383. [PMID: 36894206 DOI: 10.1016/j.hal.2023.102383] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 12/18/2022] [Accepted: 01/09/2023] [Indexed: 06/18/2023]
Abstract
Observational evidences have suggested that the surface scums of cyanobacterial harmful blooms (CyanoHABs) are highly patchy, and their spatial patterns can vary significantly within hours. This stresses the need for the capacity to monitor and predict their occurrence with better spatiotemporal continuity, in order to understand and mitigate their causes and impacts. Although polar-orbiting satellites have long been used to monitor CyanoHABs, these sensors cannot be used to capture the diurnal variability of the bloom patchiness due to their long revisit periods. In this study, we use the Himawari-8 geostationary satellite to generate high-frequency time-series observations of CyanoHABs on a sub-daily basis not possible from previous satellites. On top of that, we introduce a spatiotemporal deep learning method (ConvLSTM) to predict the dynamics of bloom patchiness at a lead time of 10 min. Our results show that the bloom scums were highly patchy and dynamic, and the diurnal variability was assumed to be largely associated with the migratory behavior of cyanobacteria. We also show that, ConvLSTM displayed fairly satisfactory performance with promising predictive capability, with Root Mean Square Error (RMSE) and determination coefficient (R2) varying between 0.66∼1.84 μg/L and 0.71∼0.94, respectively. This suggests that, by adequately capturing spatiotemporal features, the diurnal variability of CyanoHABs can be well learned and inferred by ConvLSTM. These results may have important practical implications, because they suggest that spatiotemporal deep learning integrated with high-frequency satellite observations could provide a new methodological paradigm in nowcasting of CyanoHABs.
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Affiliation(s)
- Hu Li
- State Key Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, 100084, Beijing China
| | - Chengxin Qin
- State Key Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, 100084, Beijing China
| | - Weiqi He
- Research Institute of Environmental Innovation (Suzhou), Tsinghua University, 215163, Suzhou China.
| | - Fu Sun
- State Key Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, 100084, Beijing China
| | - Pengfei Du
- State Key Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, 100084, Beijing China.
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8
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Malashenkov D, Dashkova V, Vorobjev IA, Barteneva NS. Optimizing FlowCam Imaging Flow Cytometry Operation for Classification and Quantification of Microcystis Morphospecies. Methods Mol Biol 2023; 2635:245-258. [PMID: 37074667 DOI: 10.1007/978-1-0716-3020-4_14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2023]
Abstract
Microcystis is a globally known cyanobacterium causing potentially toxic blooms worldwide. Different morphospecies with specific morphological and physiological characters usually co-occur during blooming, and their quantification employing light microscopy can be time-consuming and problematic. A benchtop imaging flow cytometer (IFC) FlowCam (Yokogawa Fluid Imaging Technologies, USA) was used to identify and quantitate different Microcystis morphospecies from environmental samples. We describe here the FlowCam methodology for sample processing and analysis of five European morphospecies of Microcystis common to the temperate zone. The FlowCam technique allows detection of different Microcystis morphospecies providing objective qualitative and quantitative data for statistical analysis.
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Affiliation(s)
- Dmitry Malashenkov
- Department of Biology, School of Sciences and Humanities, Nazarbayev University, Astana, Kazakhstan
| | - Veronika Dashkova
- PhD Program in Science, Engineering and Technology, Nazarbayev University, Astana, Kazakhstan
| | - Ivan A Vorobjev
- Department of Biology, School of Sciences and Humanities, Nazarbayev University, Astana, Kazakhstan
- National Laboratory Astana, Nazarbayev University, Astana, Kazakhstan
| | - Natasha S Barteneva
- Department of Biology, School of Sciences and Humanities, Nazarbayev University, Astana, Kazakhstan
- Brigham Women's Hospital, Harvard University, Boston, MA, USA
- The EREC, Nazarbayev University, Astana, Kazakhstan
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9
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Kekelou A, Dimitriadi A, Koumoundouros G. Sublethal exposure to Microcystis aeruginosa extracts during the yolk-sac larval stage reduces aerobic swimming speed in juvenile zebrafish. Fish Physiol Biochem 2022; 48:1443-1447. [PMID: 36462100 PMCID: PMC9763139 DOI: 10.1007/s10695-022-01151-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 11/27/2022] [Indexed: 05/13/2023]
Abstract
This study examined whether the aerobic swimming capacity of zebrafish juveniles is affected by the exposure of the yolk-sac larvae to sublethal concentration of Microcystis aeruginosa extract (200 mg dw L-1). Critical swimming speed significantly decreased in the pre-exposed fish (9.2 ± 1.0 vs 11.3 ± 1.4 TL s-1 in the control group). Exposure did not have any significant effects on the shape of the heart ventricle, rate of skeletal abnormalities, and growth or survival rates. Decreased swimming performance due to the early and short exposure to M. aeruginosa could have negative impacts on fish in the wild.
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Affiliation(s)
- Athina Kekelou
- Biology Department, University of Crete, Heraklion, Greece
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10
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Li H, Qin C, He W, Sun F, Du P. Investigating the sub-daily dynamics of cyanobacterial blooms by coupling high-frequency time-series remote sensing with hydro-ecological modelling. J Environ Manage 2022; 317:115311. [PMID: 35751230 DOI: 10.1016/j.jenvman.2022.115311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 04/20/2022] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
Cyanobacterial Harmful Algal Blooms (CyanoHABs) are a health-threatening and increasingly prevalent environmental issue at both regional and global levels. An improved understanding of the short-term dynamics of CyanoHABs is required to better capture their spatial pattern and temporal evolution. However, the heterogeneous and dynamic nature of CyanoHABs, and the interacting factors and processes that drive them, make interpreting and predicting the blooms a very challenging task. In this paper, we used an integrative approach that combines high-frequency time-series remote sensing with hydro-ecological modelling, to reproduce and investigate the sub-daily dynamics of CyanoHABs in Taihu Lake. Results show that the distribution of CyanoHABs is highly patchy and dynamic without intensive wind-induced circulation and turbulence, which suggests that the dynamic pattern may be largely caused by the migratory behavior of cyanobacteria. The hydro-ecological model well reproduced the observed pattern and trend, and the average of Root Mean Square Error (RMSE) and coefficient of determination (R2) were 9.82 μg/L and 0.52, respectively. Results from sensitivity analysis suggest that photosynthesis rate and respiration rate are two most influential model parameters. Conclusively, there is a lack of adequate representation of physiological processes in currently used modelling framework, thereby suggesting the need for microscale modelling for future modelling exercises of CyanoHABs.
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Affiliation(s)
- Hu Li
- State Key Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Chengxin Qin
- State Key Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Weiqi He
- Research Institute of Environmental Innovation (Suzhou), Tsinghua University, Suzhou, 215163, China.
| | - Fu Sun
- State Key Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Pengfei Du
- State Key Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
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11
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Nowicka-Krawczyk P, Żelazna-Wieczorek J, Skrobek I, Ziułkiewicz M, Adamski M, Kaminski A, Żmudzki P. Persistent Cyanobacteria Blooms in Artificial Water Bodies-An Effect of Environmental Conditions or the Result of Anthropogenic Change. Int J Environ Res Public Health 2022; 19:6990. [PMID: 35742239 DOI: 10.3390/ijerph19126990] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 05/31/2022] [Accepted: 06/06/2022] [Indexed: 02/01/2023]
Abstract
Algal blooms are an emerging problem. The massive development of phytoplankton is driven partly by the anthropogenic eutrophication of aquatic ecosystems and the expansion of toxic cyanobacteria in planktonic communities in temperate climate zones by the continual increase in global temperature. Cyanobacterial harmful algal blooms (CyanoHABs) not only disturb the ecological balance of the ecosystem, but they also prevent the use of waterbodies by humans. This study examines the cause of an unusual, persistent bloom in a recreational, flow-through reservoir; the findings emphasize the role played by the river supplying the reservoir in the formation of its massive cyanobacterial bloom. Comprehensive ecosystem-based environmental studies were performed, including climate change investigation, hydrochemical analysis, and bio-assessment of the ecological state of the river/reservoir, together with monitoring the cyanobacteria content of phytoplankton. Our findings show that the persistent and dominant biomass of Microcystis was related to the N/P ratio, while the presence of Aphanizomenon and Dolichospermum was associated with the high-temperature end electric conductivity of water. Together with the increase in global temperature, the massive and persistent cyanobacterial bloom appears to be maintained by the inflow of biogenic compounds carried by the river and the high electric conductivity of water. Even at the beginning of the phenomenon, the reservoir water already contained cyanobacterial toxins, which excluded its recreational use for about half the year.
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12
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El Bouaidi W, Libralato G, Douma M, Ounas A, Yaacoubi A, Lofrano G, Albarano L, Guida M, Loudiki M. A review of plant-based coagulants for turbidity and cyanobacteria blooms removal. Environ Sci Pollut Res Int 2022; 29:42601-42615. [PMID: 35384538 PMCID: PMC9148277 DOI: 10.1007/s11356-022-20036-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 03/29/2022] [Indexed: 06/14/2023]
Abstract
In recent years, the proliferation of Harmful Cyanobacterial Blooms (CyanoHABs) has increased with water eutrophication and climate change, impairing human health and the environment in relation to water supply. In drinking water treatment plants (DWTPs), the bio-coagulation based on natural coagulants has been studied as an eco-friendly alternative technology to conventional coagulants for both turbidity and CyanoHABs removal. Plant-based coagulants have demonstrated their coagulation efficiency in turbidity removal, as reported in several papers but its ability in cyanobacterial removal is still limited. This paper mainly reviewed the application of plant-based coagulants in DWTPs, with focus on turbidity removal, including cyanobacterial cells. The future potential uses of these green coagulants to reduce noxious effects of cyanobacterial proliferation are presented. Green coagulants advantages and limitations in DWTPs are reviewed and discussed summarizing more than 10 years of knowledge.
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Affiliation(s)
- Widad El Bouaidi
- Laboratory of Water, Biodiversity and Climate Change; Phycology, Biotechnology and Environmental Toxicology Research Unit, Faculty of Sciences Semlalia, Department of Biology, Cadi Ayyad University, Av. Prince My Abdellah, P. O Box 2390, 40000 Marrakesh, Morocco
| | - Giovanni Libralato
- Department of Biology, University of Naples Federico II, Complesso Universitario Di Monte Sant’Angelo, Via Cinthia 21, 80126 Naples, Italy
| | - Mountasser Douma
- Polydisciplinary Faculty of Khouribga (FPK), Sultan Moulay Slimane University, 25000 Khouribga, Morocco
| | - Abdelaziz Ounas
- Laboratory of Applied Organic Chemistry, Faculty of Sciences Semlalia, Department of Chemistry, Cadi Ayyad University, 40000 Marrakesh, Morocco
| | - Abdelrani Yaacoubi
- Laboratory of Applied Organic Chemistry, Faculty of Sciences Semlalia, Department of Chemistry, Cadi Ayyad University, 40000 Marrakesh, Morocco
| | - Giusy Lofrano
- Dipartimento Di Scienze Motorie, Umane E Della Salute, Università Degli Studi Di Roma Foro Italico, Piazza Lauro De Bosis, 15, 00135 Roma, Italy
| | - Luisa Albarano
- Department of Biology, University of Naples Federico II, Complesso Universitario Di Monte Sant’Angelo, Via Cinthia 21, 80126 Naples, Italy
| | - Marco Guida
- Department of Biology, University of Naples Federico II, Complesso Universitario Di Monte Sant’Angelo, Via Cinthia 21, 80126 Naples, Italy
| | - Mohammed Loudiki
- Laboratory of Water, Biodiversity and Climate Change; Phycology, Biotechnology and Environmental Toxicology Research Unit, Faculty of Sciences Semlalia, Department of Biology, Cadi Ayyad University, Av. Prince My Abdellah, P. O Box 2390, 40000 Marrakesh, Morocco
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13
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Rousso BZ, Bertone E, Stewart R, Aguiar A, Chuang A, Hamilton DP, Burford MA. Chlorophyll and phycocyanin in-situ fluorescence in mixed cyanobacterial species assemblages: Effects of morphology, cell size and growth phase. Water Res 2022; 212:118127. [PMID: 35121420 DOI: 10.1016/j.watres.2022.118127] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 01/24/2022] [Accepted: 01/25/2022] [Indexed: 06/14/2023]
Abstract
Cyanobacteria harmful blooms can represent a major risk for public health due to potential release of toxins and other noxious compounds in the water. A continuous and high-resolution monitoring of the cyanobacteria population is required due to their rapid dynamics, which has been increasingly done using in-situ fluorescence of phycocyanin (f-PC) and chlorophyll a (f-Chl a). Appropriate in-situ fluorometers calibration is essential because f-PC and f-Chl a are affected by biotic and abiotic factors, including species composition. Measurement of f-PC and f-Chl a in mixed species assemblages during different growth phases - representative of most field conditions - has received little attention. We hypothesized that f-PC and f-Chl a of mixed assemblages of cyanobacteria may be accurately estimated if taxa composition and fluorescence characteristics are known. We also hypothesized that species with different morphologies would have different fluorescence per unit cell and biomass. We tested these hypotheses in a controlled culture experiment in which photosynthetic pigment fluorescence, chemical pigment extraction, optical density and microscopic enumeration of four common cyanobacteria species (Aphanocapsa sp, Microcystis aeruginosa, Dolichospermum circinale and Raphidiopsis raciborskii) were quantified. Both monocultures and mixed cultures were monitored from exponential to late stationary growth phases. The sum of fluorescence of individual species calculated for mixed samples was not significantly different than measured fluorescence of mixed cultures. Estimated and measured f-PC and f-Chl a of mixed cultures had higher correlations and smaller absolute median errors when estimations were based on fluorescence per biomass instead of fluorescence per cell. Largest errors were overestimations of measured fluorescence for species with different morphologies. Fluorescence per cell was significantly different among most species, while fluorescence per unit biomass was not, indicating that conversion of fluorescence to biomass reduces species-specific bias. This study presents new information on the effect of species composition on cyanobacteria fluorescence. Best practices of deployment and operation of fluorometers, and data-driven models supporting in-situ fluorometers calibration are discussed as suitable solutions to minimize taxa-specific bias in fluorescence estimates.
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Affiliation(s)
- Benny Zuse Rousso
- Griffith School of Engineering and Built Environment, Griffith University, Parklands Drive, Southport, Queensland 4222, Australia; Cities Research Institute, Griffith University, Parklands Drive, Southport, Queensland 4222, Australia
| | - Edoardo Bertone
- Griffith School of Engineering and Built Environment, Griffith University, Parklands Drive, Southport, Queensland 4222, Australia; Cities Research Institute, Griffith University, Parklands Drive, Southport, Queensland 4222, Australia; Australian Rivers Institute, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia.
| | - Rodney Stewart
- Griffith School of Engineering and Built Environment, Griffith University, Parklands Drive, Southport, Queensland 4222, Australia; Cities Research Institute, Griffith University, Parklands Drive, Southport, Queensland 4222, Australia
| | - Arthur Aguiar
- Griffith School of Engineering and Built Environment, Griffith University, Parklands Drive, Southport, Queensland 4222, Australia
| | - Ann Chuang
- Australian Rivers Institute, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| | - David P Hamilton
- Australian Rivers Institute, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| | - Michele A Burford
- Australian Rivers Institute, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
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14
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Cao H, Han L, Li L. A deep learning method for cyanobacterial harmful algae blooms prediction in Taihu Lake, China. Harmful Algae 2022; 113:102189. [PMID: 35287935 DOI: 10.1016/j.hal.2022.102189] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 01/17/2022] [Accepted: 01/21/2022] [Indexed: 06/14/2023]
Abstract
Cyanobacterial Harmful Algae Blooms (CyanoHABs) in the eutrophic lakes have become a global environmental and ecological problem. In this study, a CNN-LSTM integrated model for predicting the CyanoHABs area was proposed and applied to the prediction of the CyanoHABs area in Taihu Lake. Firstly, the time-series data of the CyanoHABs area in Taihu Lake for 20 years were accurately obtained using MODIS images from 2000 to 2019 based on the FAI method. Then, a principal component analysis was performed on the daily meteorological data for the month before the outbreak of CyanoHABs in Taihu Lake from 2000 to 2019 to determine the meteorological factors closely related to the outbreak of CyanoHABs. Finally, the features of CyanoHABs area and meteorological data were extracted by Convolutional Neural Networks (CNN) model and used as the input of Long Short Term Memory Network (LSTM). An integrated CNN-LSTM model approach was constructed for predicting the CyanoHABs area. The results show that high R2 (0.91) and low mean relative error (17.42%) verified the validity of the FAI index to extract the CyanoHABs area in Taihu Lake; the meteorological factors closely related to the CyanoHABs outbreak in Taihu Lake are mainly temperature, relative humidity, wind speed, and precipitation; the CNN-LSTM integrated model has better prediction effect for both training and test sets compared with the CNN and LSTM models. This study provides an effective method for predicting temporal changes in the CyanoHABs area and offers new ideas for scientific and effective regulation of inland water safety.
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Affiliation(s)
- Hongye Cao
- College of Geological Engineering and Geomatics, Chang'an University, Xi'an 710064, China
| | - Ling Han
- School of Land Engineering, Chang'an University, Xi'an 710064, China.
| | - Liangzhi Li
- College of Geological Engineering and Geomatics, Chang'an University, Xi'an 710064, China
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15
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Wang K, Mou X, Cao H, Struewing I, Allen J, Lu J. Co-occurring microorganisms regulate the succession of cyanobacterial harmful algal blooms. Environ Pollut 2021; 288:117682. [PMID: 34271516 PMCID: PMC8478823 DOI: 10.1016/j.envpol.2021.117682] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 06/10/2021] [Accepted: 06/28/2021] [Indexed: 05/04/2023]
Abstract
Cyanobacterial harmful algal blooms (CyanoHABs) have been found to transmit from N2 fixer-dominated to non-N2 fixer-dominated in many freshwater environments when the supply of N decreases. To elucidate the mechanisms underlying such "counter-intuitive" CyanoHAB species succession, metatranscriptomes (biotic data) and water quality-related variables (abiotic data) were analyzed weekly during a bloom season in Harsha Lake, a multipurpose lake that serves as a drinking water source and recreational ground. Our results showed that CyanoHABs in Harsha Lake started with N2-fixing Anabaena in June (ANA stage) when N was high, and transitioned to non-N2-fixing Microcystis- and Planktothrix-dominated in July (MIC-PLA stage) when N became limited (low TN/TP). Meanwhile, the concentrations of cyanotoxins, i.e., microcystins were significantly higher in the MIC-PLA stage. Water quality results revealed that N species (i.e., TN, TN/TP) and water temperature were significantly correlated with cyanobacterial biomass. Expression levels of several C- and N-processing-related cyanobacterial genes were highly predictive of the biomass of their species. More importantly, the biomasses of Microcystis and Planktothrix were also significantly associated with expressions of microbial genes (mostly from heterotrophic bacteria) related to processing organic substrates (alkaline phosphatase, peptidase, carbohydrate-active enzymes) and cyanophage genes. Collectively, our results suggest that besides environmental conditions and inherent traits of specific cyanobacterial species, the development and succession of CyanoHABs are regulated by co-occurring microorganisms. Specifically, the co-occurring microorganisms can alleviate the nutrient limitation of cyanobacteria by remineralizing organic compounds.
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Affiliation(s)
- Kai Wang
- Department of Biological Sciences, Kent State University, Kent, OH, United States
| | - Xiaozhen Mou
- Department of Biological Sciences, Kent State University, Kent, OH, United States
| | - Huansheng Cao
- Division of Natural and Applied Sciences, Duke Kunshan University, Kunshan, China
| | - Ian Struewing
- U.S. Environmental Protection Agency, Office of Research and Development, Cincinnati, OH, United States
| | - Joel Allen
- U.S. Environmental Protection Agency, Office of Research and Development, Cincinnati, OH, United States
| | - Jingrang Lu
- U.S. Environmental Protection Agency, Office of Research and Development, Cincinnati, OH, United States.
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16
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Salter C, VanMensel D, Reid T, Birbeck J, Westrick J, Mundle SOC, Weisener CG. Investigating the microbial dynamics of microcystin-LR degradation in Lake Erie sand. Chemosphere 2021; 272:129873. [PMID: 33592515 DOI: 10.1016/j.chemosphere.2021.129873] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 01/27/2021] [Accepted: 02/04/2021] [Indexed: 06/12/2023]
Abstract
Cyanobacterial blooms and the associated hepatotoxins produced (e.g., microcystins, MCs) create a significant human health risk in freshwater lakes around the world, including Lake Erie. Though various physical and chemical treatment options are utilized, these are costly and their effectiveness decreases when other organics are present. Laboratory studies have identified a remediation option based on a mlr gene operon that can systematically degrade this toxin; however, studies on Lake Erie have been unable to amplify mlr genes from MC-degrading bacteria. These results suggest that either existing primers may be inefficient for broad identification of the mlr genes or that MC degradation genes and/or pathways may vary among bacterial taxa. To investigate the dynamics of the Lake Erie microbial community involved in the degradation of microcystin-LR (MC-LR), a flow-through column experiment using collected beach sand was conducted over a period of six weeks. Increasing concentrations of lake water spiked with MC-LR were continuously delivered to both biotic and abiotic (sterilized) sand columns, with influent and effluent MC-LR concentrations measured by LC-MS/MS. Despite the toxin concentrations far exceeding natural conditions during a bloom event (maximum dosage = 15.4 μg/L), MC-LR was completely removed within 21 h of contact time in the biotic columns. Stimulation of community taxa during the degradation process included Burkholderiaceae, Illumatobacteraceae, Pseudomonadaceae, Rhodocyclaceae and Nitrosomonadaceae. The overall results suggest several critical species may be required for the most complete and effective degradation of MC-LR.
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Affiliation(s)
- Chelsea Salter
- Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada
| | - Danielle VanMensel
- Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada
| | - Thomas Reid
- Environment and Climate Change Canada, 867 Lakeshore Road, Burlington, ON, L7R 1A1, Canada
| | - Johnna Birbeck
- Lumigen Instrument Center, Department of Chemistry, Wayne State University, Detroit, MI, 48202, USA
| | - Judy Westrick
- Lumigen Instrument Center, Department of Chemistry, Wayne State University, Detroit, MI, 48202, USA
| | - Scott O C Mundle
- Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada
| | - Christopher G Weisener
- Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada.
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17
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Zepernick BN, Gann ER, Martin RM, Pound HL, Krausfeldt LE, Chaffin JD, Wilhelm SW. Elevated pH Conditions Associated With Microcystis spp. Blooms Decrease Viability of the Cultured Diatom Fragilaria crotonensis and Natural Diatoms in Lake Erie. Front Microbiol 2021; 12:598736. [PMID: 33717001 PMCID: PMC7943883 DOI: 10.3389/fmicb.2021.598736] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 01/20/2021] [Indexed: 11/13/2022] Open
Abstract
Cyanobacterial Harmful Algal Blooms (CyanoHABs) commonly increase water column pH to alkaline levels ≥9.2, and to as high as 11. This elevated pH has been suggested to confer a competitive advantage to cyanobacteria such as Microcystis aeruginosa. Yet, there is limited information regarding the restrictive effects bloom-induced pH levels may impose on this cyanobacterium’s competitors. Due to the pH-dependency of biosilicification processes, diatoms (which seasonally both precede and proceed Microcystis blooms in many fresh waters) may be unable to synthesize frustules at these pH levels. We assessed the effects of pH on the ecologically relevant diatom Fragilaria crotonensis in vitro, and on a Lake Erie diatom community in situ. In vitro assays revealed F. crotonensis monocultures exhibited lower growth rates and abundances when cultivated at a starting pH of 9.2 in comparison to pH 7.7. The suppressed growth trends in F. crotonensis were exacerbated when co-cultured with M. aeruginosa at pH conditions and cell densities that simulated a cyanobacteria bloom. Estimates demonstrated a significant decrease in silica (Si) deposition at alkaline pH in both in vitro F. crotonensis cultures and in situ Lake Erie diatom assemblages, after as little as 48 h of alkaline pH-exposure. These observations indicate elevated pH negatively affected growth rate and diatom silica deposition; in total providing a competitive disadvantage for diatoms. Our observations demonstrate pH likely plays a significant role in bloom succession, creating a potential to prolong summer Microcystis blooms and constrain diatom fall resurgence.
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Affiliation(s)
- Brittany N Zepernick
- Department of Microbiology, The University of Tennessee, Knoxville, Knoxville, TN, United States
| | - Eric R Gann
- Department of Microbiology, The University of Tennessee, Knoxville, Knoxville, TN, United States
| | - Robbie M Martin
- Department of Microbiology, The University of Tennessee, Knoxville, Knoxville, TN, United States
| | - Helena L Pound
- Department of Microbiology, The University of Tennessee, Knoxville, Knoxville, TN, United States
| | - Lauren E Krausfeldt
- Department of Microbiology, The University of Tennessee, Knoxville, Knoxville, TN, United States
| | - Justin D Chaffin
- F.T. Stone Laboratory and Ohio Sea Grant, The Ohio State University, Put-in-Bay, OH, United States
| | - Steven W Wilhelm
- Department of Microbiology, The University of Tennessee, Knoxville, Knoxville, TN, United States
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18
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Hardy FJ, Preece E, Backer L. Status of state cyanoHAB outreach and monitoring efforts, United States. Lake Reserv Manag 2021; 37:246-260. [PMID: 35928550 PMCID: PMC9348555 DOI: 10.1080/10402381.2020.1863530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A widespread effort is underway to improve awareness of cyanobacteria harmful algal blooms (cyanoHABs) across the United States using a variety of monitoring programs and public health outreach measures to protect people, pets, and livestock. To determine the status of cyanoHAB outreach and monitoring efforts, 2 questionnaires were distributed to health/environmental departments in 50 states and the District of Columbia (DC). One questionnaire focused on cyanoHAB exposure to humans from drinking water and the second targeted exposure through recreational activities. All states plus DC responded to the recreational survey; 46 states plus DC responded to the drinking water survey. All states except Alaska answered that microcystins were the cyanotoxins of greatest concern for recreational exposure; microcystins were also of greatest concern for drinking water with the exception of Utah (anatoxin-a in reservoirs was greatest concern) and Rhode Island (microcystins and anatoxin-a in reservoirs/ponds were greatest concern). Regional comparisons disclosed a lack of cyanoHAB programs in southern states relative to northern states that may be related to the higher percentage of water surface area in northern states. Interestingly, recreational outreach is more extensive than drinking water outreach (only 16 states reported having some type of drinking water outreach program, compared with 35 states with recreational outreach), and preferred outreach methods are websites and press releases. Additionally, respondents reported very limited funding for outreach and monitoring programs. Our results establish baseline information to help determine what future direction cyanoHAB outreach and monitoring programs can take at local, regional, and national levels.
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Affiliation(s)
- F. Joan Hardy
- Washington State Department of Health, Olympia, WA 98504-7890
| | | | - Lorraine Backer
- Centers for Disease Control and Prevention, National Center for Environmental Health, Chamblee, GA
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19
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Mishra DR, Kumar A, Ramaswamy L, Boddula VK, Das MC, Page BP, Weber SJ. CyanoTRACKER: A cloud-based integrated multi-platform architecture for global observation of cyanobacterial harmful algal blooms. Harmful Algae 2020; 96:101828. [PMID: 32560841 DOI: 10.1016/j.hal.2020.101828] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 03/10/2020] [Accepted: 05/07/2020] [Indexed: 05/17/2023]
Abstract
Over the past decade, the global proliferation of cyanobacterial harmful algal blooms (CyanoHABs) have presented a major risk to the public and wildlife, and ecosystem and economic services provided by inland water resources. As a consequence, water resources, environmental, and healthcare agencies are in need of early information about the development of these blooms to mitigate or minimize their impact. Results from various components of a novel multi-cloud cyber-infrastructure referred to as "CyanoTRACKER" for initial detection and continuous monitoring of spatio-temporal growth of CyanoHABs is highlighted in this study. The novelty of the CyanoTRACKER framework is the collection and integration of combined community reports (social cloud), remote sensing data (sensor cloud) and digital image analytics (computation cloud) to detect and differentiate between regular algal blooms and CyanoHABs. Individual components of CyanoTRACKER include a reporting website, mobile application (App), remotely deployable solar powered automated hyperspectral sensor (CyanoSense), and a cloud-based satellite data processing and integration tool. All components of CyanoTRACKER provided important data related to CyanoHABs assessments for regional and global water bodies. Reports and data received via social cloud including the mobile App, Twitter, Facebook, and CyanoTRACKER website, helped in identifying the geographic locations of CyanoHABs affected water bodies. A significant increase (124.92%) in tweet numbers related to CyanoHABs was observed between 2011 (total relevant tweets = 2925) and 2015 (total relevant tweets = 6579) that reflected an increasing trend of the harmful phenomena across the globe as well as an increased awareness about CyanoHABs among Twitter users. The CyanoHABs affected water bodies extracted via the social cloud were categorized, and smaller water bodies were selected for the deployment of CyanoSense, and satellite data analysis was performed for larger water bodies. CyanoSense was able to differentiate between ordinary algae and CyanoHABs through the use of their characteristic absorption feature at 620 nm. The results and products from this infrastructure can be rapidly disseminated via the CyanoTRACKER website, social media, and direct communication with appropriate management agencies for issuing warnings and alerting lake managers, stakeholders and ordinary citizens to the dangers posed by these environmentally harmful phenomena.
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Affiliation(s)
- Deepak R Mishra
- Department of Geography, University of Georgia, Athens, GA 30602, United States.
| | - Abhishek Kumar
- Department of Geography, University of Georgia, Athens, GA 30602, United States
| | - Lakshmish Ramaswamy
- Department of Computer Science, University of Georgia, Athens, GA 30602, United States
| | - Vinay K Boddula
- Department of Computer Science, University of Georgia, Athens, GA 30602, United States
| | - Moumita C Das
- Department of Computer Science, University of Georgia, Athens, GA 30602, United States
| | - Benjamin P Page
- Department of Geography, University of Georgia, Athens, GA 30602, United States; Water Resources Center, University of Minnesota, St. Paul, MN, 55108, United States
| | - Samuel J Weber
- Department of Geography, University of Georgia, Athens, GA 30602, United States; Department of Ecology & Evolutionary Biology, University of California, Irvine, CA 92697, United States
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20
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Paerl HW, Barnard MA. Mitigating the global expansion of harmful cyanobacterial blooms: Moving targets in a human- and climatically-altered world. Harmful Algae 2020; 96:101845. [PMID: 32560828 PMCID: PMC7334832 DOI: 10.1016/j.hal.2020.101845] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 05/23/2020] [Accepted: 05/24/2020] [Indexed: 05/03/2023]
Abstract
Cyanobacterial harmful algal blooms (CyanoHABs) are a major threat to human and environmental health. As global proliferation of CyanoHABs continues to increase in prevalence, intensity, and toxicity, it is important to identify and integrate the underlying causes and controls of blooms in order to develop effective short- and long-term mitigation strategies. Clearly, nutrient input reductions should receive high priority. Legacy effects of multi-decadal anthropogenic eutrophication have altered limnetic systems such that there has been a shift from exclusive phosphorus (P) limitation to nitrogen (N) limitation and N and P co-limitation. Additionally, climate change is driving CyanoHAB proliferation through increasing global temperatures and altered precipitation patterns, including more extreme rainfall events and protracted droughts. These scenarios have led to the "perfect storm scenario"; increases in pulsed nutrient loading events, followed by persistent low-flow, long water residence times, favoring bloom formation and proliferation. To meet the CyanoHAB mitigation challenge, we must: (1) Formulate watershed and airshed-specific N and P input reductions on a sliding scale to meet anthropogenic and climatic forcings. (2) Develop CyanoHAB management strategies that incorporate current and anticipated climatic changes and extremes. (3) Make nutrient management strategies compatible with other physical-chemical-biological mitigation approaches, such as altering freshwater flow and flushing, dredging, chemical applications, introduction of selective grazers, etc. (4) Target CyanoHAB toxin production and developing management approaches to reduce toxin production. (5) Develop broadly applicable long-term strategies that incorporate the above recommendations.
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Affiliation(s)
- Hans W Paerl
- Institute of Marine Sciences, University of North Carolina at Chapel Hill, 3431 Arendell St, Morehead City, NC, USA.
| | - Malcolm A Barnard
- Institute of Marine Sciences, University of North Carolina at Chapel Hill, 3431 Arendell St, Morehead City, NC, USA.
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Zhang Y, Whalen JK. Production of the neurotoxin beta-N-methylamino-l-alanine may be triggered by agricultural nutrients: An emerging public health issue. Water Res 2020; 170:115335. [PMID: 31812811 DOI: 10.1016/j.watres.2019.115335] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 11/18/2019] [Accepted: 11/23/2019] [Indexed: 06/10/2023]
Abstract
Diverse taxa of cyanobacteria, dinoflagellates and diatoms produce β-N-methylamino-l-alanine (BMAA), a non-lipophilic, non-protein amino acid. BMAA is a neurotoxin in mammals. Its ingestion may be linked to human neurodegenerative diseases, namely the Amyotrophic lateral sclerosis/Parkinsonism dementia complex, based on epidemiological evidence from regions where cyanobacterial harmful algal blooms occur frequently. In controlled environments, cyanobacteria produce BMAA in response to ecophysiological cues such as nutrient availability, which may explain the elevated BMAA concentrations in freshwater environments that receive nutrient-rich agricultural runoff. This critical review paper summarizes what is known about how BMAA supports ecophysiological functions like nitrogen metabolism, photosyntheis and provides a competitive advantage to cyanobacteria in controlled and natural environments. We explain how BMAA production affected competitive interactions among the N2-fixing and non-N2-fixing populations in a freshwater cyanobacterial bloom that was stimulated by nutrient loading from the surrounding agricultural landscape. Better control of nutrients in agricultural fields is an excellent strategy to avoid the negative environmental consequences and public health concerns related to BMAA production.
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Affiliation(s)
- Yanyan Zhang
- McGill University, Department of Natural Resource Sciences, Macdonald Campus, 21, 111 Lakeshore Road, Ste-Anne-de, Bellevue, Quebec, H9X 3V9, Canada
| | - Joann K Whalen
- McGill University, Department of Natural Resource Sciences, Macdonald Campus, 21, 111 Lakeshore Road, Ste-Anne-de, Bellevue, Quebec, H9X 3V9, Canada.
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El Amrani Zerrifi S, Tazart Z, El Khalloufi F, Oudra B, Campos A, Vasconcelos V. Potential control of toxic cyanobacteria blooms with Moroccan seaweed extracts. Environ Sci Pollut Res Int 2019; 26:15218-15228. [PMID: 30927222 DOI: 10.1007/s11356-019-04921-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 03/20/2019] [Indexed: 06/09/2023]
Abstract
Marine macroalgae are a promising source of diverse bioactive compounds with applications in the biocontrol of harmful cyanobacteria blooms (cyanoHABs). In this work, we evaluated the potential algicidal activities of 14 species of seaweed collected from the coast of Souiria Laqdima, Morocco. Methanol extracts were screened in solid and liquid medium against the growth of the toxic cyanobacteria Microcystis aeruginosa and the microalgae Chlorella sp. used as food supplement. The results in solid medium revealed that the algicidal activity was limited to M. aeruginosa with the extract of Bornetia secundiflora showing the highest growth inhibition activity against Microcystis (27.33 ± 0.33 mm), whereas the extracts of Laminaria digitata, Halopytis incurvus, Ulva lactuca, and Sargasum muticum showed no inhibition. In liquid medium, the results indicated that all methanolic extracts of different macroalgae tested have a significant inhibitory effect on M. aeruginosa compared with that of the negative control. The maximum inhibition rates of M. aeruginosa were produced by the extracts of Bifurcaria tuberculata, Codium elongatum, and B. secundiflora. Moreover, the extracts of B. secundiflora recorded the maximum inhibition rate of Chlorella sp. Overall, the results highlight the potential of the extracts from macroalgae to control toxic cyanobacteria species.
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Affiliation(s)
- Soukaina El Amrani Zerrifi
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia Marrakech, Cadi Ayyad University, Av. Prince My Abdellah, P.O. Box 2390, 40000, Marrakech, Morocco
| | - Zakaria Tazart
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia Marrakech, Cadi Ayyad University, Av. Prince My Abdellah, P.O. Box 2390, 40000, Marrakech, Morocco
| | - Fatima El Khalloufi
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia Marrakech, Cadi Ayyad University, Av. Prince My Abdellah, P.O. Box 2390, 40000, Marrakech, Morocco
- Polydisciplinary Faculty of Khouribga (FPK), Sultan Moulay Slimane University, Beni-Mellal, Morocco
| | - Brahim Oudra
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia Marrakech, Cadi Ayyad University, Av. Prince My Abdellah, P.O. Box 2390, 40000, Marrakech, Morocco
| | - Alexandre Campos
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208, Matosinhos, Portugal
| | - Vitor Vasconcelos
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208, Matosinhos, Portugal.
- Departament of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007, Porto, Portugal.
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Zhou J, Qin B, Han X, Zhu L. Turbulence increases the risk of microcystin exposure in a eutrophic lake (Lake Taihu) during cyanobacterial bloom periods. Harmful Algae 2016; 55:213-220. [PMID: 28073534 DOI: 10.1016/j.hal.2016.03.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 03/12/2016] [Accepted: 03/15/2016] [Indexed: 06/06/2023]
Abstract
Toxic cyanobacterial harmful algal blooms (CyanoHABs) have posed serious water use and public health threats because of the toxins they produce, such as the microcystins (MCs). The direct physical effects of turbulence on MCs, however, have not yet been addressed and is still poorly elucidated. In this study, a 6-day mesocosm experiment was carried out to evaluate the effects of wind wave turbulence on the competition of toxic Microcystis and MCs production in highly eutrophicated and turbulent Lake Taihu, China. Under turbulent conditions, MCs concentrations (both total and extracellular) significantly increased and reached a maximum level 3.4 times higher than in calm water. Specifically, short term (∼3 days) turbulence favored the growth of toxic Microcystis species, allowing for the accumulation of biomass which also triggered the increase in MCs toxicity. Moreover, intense turbulence raises the shear stress and could cause cell mechanical damage or cellular lysis resulting in cell breakage and leakage of intracellular materials including the toxins. The results indicate that short term (∼3 days) turbulence is beneficial for MCs production and release, which increase the potential exposure of aquatic organisms and humans. This study suggests that the importance of water turbulence in the competition of toxic Microcystis and MCs production, and provides new perspectives for control of toxin in CyanoHABs-infested lakes.
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Affiliation(s)
- Jian Zhou
- Taihu Lake Laboratory Ecosystem Station, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 210008, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Boqiang Qin
- Taihu Lake Laboratory Ecosystem Station, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 210008, PR China.
| | - Xiaoxia Han
- Taihu Lake Laboratory Ecosystem Station, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 210008, PR China
| | - Lin Zhu
- Taihu Lake Laboratory Ecosystem Station, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 210008, PR China
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