Harmful Algal Blooms Can Be Deadly to Pets and Livestock
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State of the Science for Cyanobacterial Blooms (Microcystis Species) in Florida a Summary Document from the 2019 Harmful Algal Bloom State of the Science Symposium
State of the Science for Cyanobacterial Blooms (Microcystis species) in Florida A summary document from the 2019 Harmful Algal Bloom State of the Science Symposium Image: Cyanobacterial bloom in Lake Okeechobee Credit: L. Krimsky, Florida Sea Grant Contents: Introduction In recent years, intense blooms of Karenia brevis red tide and Introduction.....................................................2 Microcystis aeruginosa cyanobacteria, known commonly as Current Understanding.....................................3 blue-green algae, have plagued Florida waterways, impacting the state’s economy, environment and public health. Though Bloom Initiation, Development notable in their duration and intensity, these harmful algal and Termination...............................................3 blooms, or HABs, are not uncommon. Florida experiences a variety of HABs in its marine and fresh waters. Public Health....................................................4 Bloom Prediction and Modeling .......................5 In 2019, Governor Ron DeSantis’ Executive Order 19-12 established the Blue-Green Algae Task Force and revived the Bloom Detection and Monitoring......................5 state’s Harmful Algal Bloom Task Force to provide technical expertise and recommendations to reduce the adverse Bloom Mitigation and Control...........................6 impacts of future blooms. Next Steps........................................................6 This fact sheet represents the latest science-based Conclusion.......................................................6 -
Investigation of a Microcystis Aeruginosa Cyanobacterial Freshwater Harmful Algal Bloom Associated with Acute Microcystin Toxicosis in a Dog
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by K-State Research Exchange This is the author’s final, peer-reviewed manuscript as accepted for publication. The publisher-formatted version may be available through the publisher’s web site or your institution’s library. Investigation of a Microcystis aeruginosa cyanobacterial freshwater harmful algal bloom associated with acute microcystin toxicosis in a dog Deon van der Merwe, Lionel Sebbag, Jerome C. Nietfeld, Mark T. Aubel, Amanda Foss, Edward Carney How to cite this manuscript If you make reference to this version of the manuscript, use the following information: Van der Merwe, D., Sebbag, L., Nietfeld, J. C., Aubel, M. T., Foss, A., & Carney, E. (2012). Investigation of a Microcystis aeruginosa cyanobacterial freshwater harmful algal bloom associated with acute microcystin toxicosis in a dog. Retrieved from http://krex.ksu.edu Published Version Information Citation: Van der Merwe, D., Sebbag, L., Nietfeld, J. C., Aubel, M. T., Foss, A., & Carney, E. (2012). Investigation of a Microcystis aeruginosa cyanobacterial freshwater harmful algal bloom associated with acute microcystin toxicosis in a dog. Journal of Veterinary Diagnostic Investigation, 24(4), 679-687. Copyright: © 2012 The Author(s) Digital Object Identifier (DOI): doi:10.1177/1040638712445768 Publisher’s Link: http://vdi.sagepub.com/content/24/4/679 This item was retrieved from the K-State Research Exchange (K-REx), the institutional repository of Kansas State University. K-REx is available at http://krex.ksu.edu 1 TITLE PAGE 2 Investigation of a Microcystis aeruginosa cyanobacterial freshwater harmful algal bloom 3 associated with acute microcystin toxicosis in a dog 4 5 Deon van der Merwe1, Lionel Sebbag, Jerome C. -
Microcystis Aeruginosa: Source of Toxic Microcystins in Drinking Water
African Journal of Biotechnology Vol. 3 (3), pp. 159-168, March 2004 Available online at http://www.academicjournals.org/AJB ISSN 1684–5315 © 2004 Academic Journals Review Microcystis aeruginosa: source of toxic microcystins in drinking water Oberholster PJ1, Botha A-M2* and Grobbelaar JU1 1Department of Plant Sciences, Faculty of Natural and Agricultural Sciences, University of the Free State, PO Box 339, Bloemfontein, ZA9300 2Department of Genetics, Forestry and Agriculture Biotechnology Institute, University of Pretoria, Hillcrest, Pretoria, ZA0002, South Africa Accepted 21 December 2003 Cyanobacteria are one of the earth’s most ancient life forms. Evidence of their existence on earth, derived from fossil records, encompasses a period of some 3.5 billion years in the late Precambrian era. Cyanobacteria are the dominant phytoplanton group in eutrophic freshwater bodies worldwide. They have caused animal poisoning in many parts of the world and may present risks to human health through drinking and recreational activity. Cyanobacteria produce two main groups of toxin namely neurotoxins and peptide hepatotoxins. They were first characterized from the unicellular species, Microcystis aeruginosa, which is the most common toxic cyanobacterium in eutrophic freshwater. The association of environmental parameters with cyanobacterial blooms and the toxicity of microcystin are discussed. Also, the synthesis of the microcystins, as well as the mode of action, control and analysis methods for quantitation of the toxin is reviewed. Key words: Cyanobacteria, microcystins, mcyB gene, PCR-RFLP. INTRODUCTION Cyanobacteria are the dominant phytoplankton group in other accessory pigments are grouped together in rods eutrophic freshwater bodies (Davidson, 1959; Negri et al., and discs that are called phycobilisomes that are 1995). -
A Review of the Health Protective Effects of Phenolic Acids Against a Range of Severe Pathologic Conditions (Including Coronavirus-Based Infections)
molecules Review A Review of the Health Protective Effects of Phenolic Acids against a Range of Severe Pathologic Conditions (Including Coronavirus-Based Infections) Sotirios Kiokias 1,* and Vassiliki Oreopoulou 2 1 European Research Executive Agency, Place Charles Rogier 16, 1210 Bruxelles, Belgium 2 Laboratory of Food Chemistry and Technology, School of Chemical Engineering, National Technical University of Athens, Iron Politechniou 9, 15780 Athens, Greece; [email protected] * Correspondence: [email protected]; Tel.: +32-49-533-2171 Abstract: Phenolic acids comprise a class of phytochemical compounds that can be extracted from various plant sources and are well known for their antioxidant and anti-inflammatory properties. A few of the most common naturally occurring phenolic acids (i.e., caffeic, carnosic, ferulic, gallic, p-coumaric, rosmarinic, vanillic) have been identified as ingredients of edible botanicals (thyme, oregano, rosemary, sage, mint, etc.). Over the last decade, clinical research has focused on a number of in vitro (in human cells) and in vivo (animal) studies aimed at exploring the health protective effects of phenolic acids against the most severe human diseases. In this review paper, the authors first report on the main structural features of phenolic acids, their most important natural sources and their extraction techniques. Subsequently, the main target of this analysis is to provide an overview of the most recent clinical studies on phenolic acids that investigate their health effects against a range Citation: Kiokias, S.; Oreopoulou, V. A Review of the Health Protective of severe pathologic conditions (e.g., cancer, cardiovascular diseases, hepatotoxicity, neurotoxicity, Effects of Phenolic Acids against a and viral infections—including coronaviruses-based ones). -
Microcystin Incidence in the Drinking Water of Mozambique: Challenges for Public Health Protection
toxins Review Microcystin Incidence in the Drinking Water of Mozambique: Challenges for Public Health Protection Isidro José Tamele 1,2,3 and Vitor Vasconcelos 1,4,* 1 CIIMAR/CIMAR—Interdisciplinary Center of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto, Avenida General Norton de Matos, 4450-238 Matosinhos, Portugal; [email protected] 2 Institute of Biomedical Science Abel Salazar, University of Porto, R. Jorge de Viterbo Ferreira 228, 4050-313 Porto, Portugal 3 Department of Chemistry, Faculty of Sciences, Eduardo Mondlane University, Av. Julius Nyerere, n 3453, Campus Principal, Maputo 257, Mozambique 4 Faculty of Science, University of Porto, Rua do Campo Alegre, 4069-007 Porto, Portugal * Correspondence: [email protected]; Tel.: +351-223-401-817; Fax: +351-223-390-608 Received: 6 May 2020; Accepted: 31 May 2020; Published: 2 June 2020 Abstract: Microcystins (MCs) are cyanotoxins produced mainly by freshwater cyanobacteria, which constitute a threat to public health due to their negative effects on humans, such as gastroenteritis and related diseases, including death. In Mozambique, where only 50% of the people have access to safe drinking water, this hepatotoxin is not monitored, and consequently, the population may be exposed to MCs. The few studies done in Maputo and Gaza provinces indicated the occurrence of MC-LR, -YR, and -RR at a concentration ranging from 6.83 to 7.78 µg L 1, which are very high, around 7 times · − above than the maximum limit (1 µg L 1) recommended by WHO. The potential MCs-producing in · − the studied sites are mainly Microcystis species. -
Investigation of a Microcystis Aeruginosa Cyanobacterial Freshwater Harmful Algal Bloom Associated with Acute Microcystin Toxicosis in a Dog
This is the author’s final, peer-reviewed manuscript as accepted for publication. The publisher-formatted version may be available through the publisher’s web site or your institution’s library. Investigation of a Microcystis aeruginosa cyanobacterial freshwater harmful algal bloom associated with acute microcystin toxicosis in a dog Deon van der Merwe, Lionel Sebbag, Jerome C. Nietfeld, Mark T. Aubel, Amanda Foss, Edward Carney How to cite this manuscript If you make reference to this version of the manuscript, use the following information: Van der Merwe, D., Sebbag, L., Nietfeld, J. C., Aubel, M. T., Foss, A., & Carney, E. (2012). Investigation of a Microcystis aeruginosa cyanobacterial freshwater harmful algal bloom associated with acute microcystin toxicosis in a dog. Retrieved from http://krex.ksu.edu Published Version Information Citation: Van der Merwe, D., Sebbag, L., Nietfeld, J. C., Aubel, M. T., Foss, A., & Carney, E. (2012). Investigation of a Microcystis aeruginosa cyanobacterial freshwater harmful algal bloom associated with acute microcystin toxicosis in a dog. Journal of Veterinary Diagnostic Investigation, 24(4), 679-687. Copyright: © 2012 The Author(s) Digital Object Identifier (DOI): doi:10.1177/1040638712445768 Publisher’s Link: http://vdi.sagepub.com/content/24/4/679 This item was retrieved from the K-State Research Exchange (K-REx), the institutional repository of Kansas State University. K-REx is available at http://krex.ksu.edu 1 TITLE PAGE 2 Investigation of a Microcystis aeruginosa cyanobacterial freshwater harmful algal bloom 3 associated with acute microcystin toxicosis in a dog 4 5 Deon van der Merwe1, Lionel Sebbag, Jerome C. Nietfeld, Mark T. -
Blue-Green Algal Bloom Weekly Update Reporting August 21 - 27, 2020
BLUE-GREEN ALGAL BLOOM WEEKLY UPDATE REPORTING AUGUST 21 - 27, 2020 SUMMARY There were 44 reports of visits in the past seven days (8/21 – 8/27), with 44 samples collected. Algal bloom conditions were observed by the samplers at 14 sites. Satellite imagery for Lake Okeechobee and the Caloosahatchee and St. Lucie estuaries from 8/25 showed approximately 15% coverage of low to moderate algal bloom potential on the lake. Highest bloom potential was observed along the northwest shore. No bloom potential was observed on the visible portions of either estuaries. Satellite imagery for the St. Johns River from 8/26 did not show any bloom potential on Lake George or the main stem of the St. Johns River. Crescent Lake showed high bloom potential on the northern two-thirds of the lake, with the southern third of the lake obscured by cloud cover. Please keep in mind that bloom potential is subject to change due to rapidly changing environmental conditions or satellite inconsistencies (i.e., wind, rain, temperature or stage). On 8/24, South Florida Water Management District (SFWMD) staff collected samples from the C43 canal - S77 structure (upstream) and on Lake Okeechobee – S308C structure (lakeside). Neither sample had a dominant algal taxon and no cyanotoxins were detected in either sample. On 8/24, Florida Department of Environmental Protection (DEP) staff collected two samples at Harbor Isles Lake – Southern Lobe and Harbor Isle Lake – NW Lobe. Both samples were dominated by Microcystis aeruginosa. The Southern Lobe sample had 28 parts per billion (ppb) total microcystins and the NW Lobe sample had 45 ppb total microcystins. -
Microcystis Aeruginosa in a Central Chilean (36° Lat
Almanza et al. Revista Chilena de Historia Natural (2016) 89:8 Revista Chilena de DOI 10.1186/s40693-016-0057-7 Historia Natural RESEARCH Open Access Occurrence of toxic blooms of Microcystis aeruginosa in a central Chilean (36° Lat. S) urban lake Viviana Almanza1,2*, Oscar Parra1, Carlos E. De M. Bicudo4,CarolinaBaeza1, Johana Beltran1, Ricardo Figueroa1,3 and Roberto Urrutia1,3 Abstract Background: During the last decades the frequency and global distribution of toxic cyanobacteria blooms has increased globally, which has been attributed to the eutrophication and climate change. In Chile there have been reports on blooms in aquatic ecosystem in localities with high density population and on the presence of five congeners of microcystins but only two documented toxics blooms with hundreds fish kills. We investigated the presence of toxic cyanobacteria blooms in the Lo Galindo urban lake, Concepción city, and the environmental factors that influence the abundance of cyanobacteria and microcystins concentration. Lo Galindo Lake, is used for various recreational and eventually as a drinking water source. Results: Toxic blooms of Microcystis aeruginosa are developed in Lo Galindo lake, those that occur throughout the year in a wide range of environmental conditions, forming scums blooms during summer and dispersive blooms in all seasons. There are different microcystin congeners, the most frequent congener was MC-RR (21 %) and the highest concentration corresponded to 115.4 µg L-1 MC-LR. Conclusions: The dominance and development of the M. aeruginosa blooms in the lake is determined by various environmental factors such as temperature, nutrients, diversity of taxa and wind speed that affect the formation of disperse-type blooms and/or scums; the latter are developed only in summer, coinciding with the highest temperature and concentrations of total microcystins. -
Adsorption Strategy for Removal of Harmful Cyanobacterial Species Microcystis Aeruginosa Using Chitosan Fiber
sustainability Article Adsorption Strategy for Removal of Harmful Cyanobacterial Species Microcystis aeruginosa Using Chitosan Fiber 1, 1,2, 1 3, 1, Yun Hwan Park y, Sok Kim y, Ho Seon Kim , Chulhwan Park * and Yoon-E Choi * 1 Division of Environmental Science & Ecological Engineering, Korea University, Seoul 02841, Korea; [email protected] (Y.H.P.); [email protected] (S.K.); [email protected] (H.S.K.) 2 BK21 Plus Eco-Leader Education Center, Korea University, Seoul 02841, Korea 3 Department of Chemical Engineering, Kwangwoon University, Seoul 01897, Korea * Correspondence: [email protected] (C.P.); [email protected] (Y.-EC.) The authors equally contributed to the present study. y Received: 17 April 2020; Accepted: 1 June 2020; Published: 4 June 2020 Abstract: Microcystis aeruginosa is one of the predominant species responsible for cyanobacterial-harmful algal blooms (Cyano-HABs) in water bodies. Cyano-HABs pose a growing number of serious threats to the environment and public health. Therefore, the demand for developing safe and eco-friendly solutions to control Cyano-HABs is increasing. In the present study, the adsorptive strategy using chitosan was applied to remove M. aeruginosa cells from aqueous phases. Using a simple immobilization process, chitosan could be fabricated as a fiber sorbent (chitosan fiber, CF). By application of CF, almost 89% of cyanobacterial cells were eliminated, as compared to those in the control group. Field emission scanning electron microscopy proved that the M. aeruginosa cells were mainly attached to the surface of the sorbent, which was correlated well with the measurement of the surface area of the fiber. -
Programmed Cell Death-Like and Accompanying Release of Microcystin in Freshwater Bloom-Forming Cyanobacterium Microcystis: from Identification to Ecological Relevance
toxins Review Programmed Cell Death-Like and Accompanying Release of Microcystin in Freshwater Bloom-Forming Cyanobacterium Microcystis: From Identification to Ecological Relevance Chenlin Hu 1,* and Piotr Rzymski 2,* 1 College of Pharmacy, University of Houston, Houston, TX 77204, USA 2 Department of Environmental Medicine, Poznan University of Medical Sciences, 60-806 Poznan, Poland * Correspondence: [email protected] (C.H.); [email protected] (P.R.) Received: 14 November 2019; Accepted: 1 December 2019; Published: 4 December 2019 Abstract: Microcystis is the most common freshwater bloom-forming cyanobacterium. Its massive blooms not only adversely affect the functionality of aquatic ecosystems, but are also associated with the production of microcystins (MCs), a group of potent toxins that become a threat to public health when cell-bound MCs are significantly released from the dying Microcystis into the water column. Managing Microcystis blooms thus requires sufficient knowledge regarding both the cell death modes and the release of toxins. Recently, more and more studies have demonstrated the occurrence of programmed cell death-like (or apoptosis-like) events in laboratory and field samples of Microcystis. Apoptosis is a genetically controlled process that is essential for the development and survival of metazoa; however, it has been gradually realized to be an existing phenomenon playing important ecological roles in unicellular microorganisms. Here, we review the current progress and the existing knowledge gap regarding apoptosis-like death in Microcystis. Specifically, we focus first on the tools utilized to characterize the apoptosis-related biochemical and morphological features in Microcystis. We further outline various stressful stimuli that trigger the occurrence of apoptosis and discuss the potential mechanisms of apoptosis in Microcystis. -
KLAIPĖDA UNIVERSITY Algirdas Švanys Effects of the Allelopathically Active Macrophyte Myriophyllum Spicatum on the Potentially
KLAIPĖDA UNIVERSITY Algirdas Švanys Effects of the allelopathically active macrophyte Myriophyllum spicatum on the potentially toxic cyanobacterium Microcystis aeruginosa Doctoral dissertation Biomedical sciences, ecology and environmental sciences (03B) Klaipėda, 2015 The work was carried out at the Marine Science and Tech- nology Centre, Klaipėda University, in 2010-2015. Supervisor: Dr. Ričardas Paškauskas (Klaipėda University; Biomedi- cal Sciences, Ecology and Environmental Sciences – 03B) Academic advisor: PD Dr. Sabine Hilt (Leibniz Institute of Freshwater Ecol- ogy and Inland Fisheries, Biomedical Sciences, Ecology and Environmental Sciences – 03B) Acknowledgements I express my honest gratitude to my supervisor Ričardas Paškauskas for his honest and invaluable support. My honest gratitude also goes to Sabine Hilt for giving me an opportu- nity to work at Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB) and her invaluable supervision, sci- entific encouragement and fair criticism. I am thankful to Hans-Peter Grossart for enabling my visit at the IGB Neu- globsow and valuable scientific support. I would also like to thank Jean-Fran¸coisHumbert for the chance to take part in the field study in the Villerest reservoir. I also thank Olga Anne for her valuable support and encouragement. My special thanks go to Falk Eigemann for his humour, enthusiastic teaching and ongoing supervision of all my exper- iments at IGB. I thank Aurélie Villeneuve for her supervision at Institut Pasteur and National Institute of Agronomic Re- -
Identification of Toxigenic Microcystis Strains After Incidents of Wild Animal
ARTICLE IN PRESS Ecotoxicology and Environmental Safety ] (]]]]) ]]]–]]] Contents lists available at ScienceDirect Ecotoxicology and Environmental Safety journal homepage: www.elsevier.com/locate/ecoenv Identification of toxigenic Microcystis strains after incidents of wild animal mortalities in the Kruger National Park, South Africa Paul J. Oberholster a,Ã, Jan G. Myburgh b, Danny Govender c, Roy Bengis d, Anna-Maria Botha e a CSIR Natural Resources and the Environment, P.O. Box 395, Pretoria 0001, South Africa b Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, P/Bag X04, Onderstepoort 0110, South Africa c South African National Parks, Veterinary Wildlife Services, P/Bag X402, Skukuza 1350, South Africa d State Veterinary Investigation Center, P.O. Box 12, Skukuza 1350, Kruger National Park, South Africa e Department of Genetics, University of Pretoria, Hillcrest, Pretoria 0002, South Africa article info abstract Article history: The eutrophic process potentially caused by a high urine and faecal load resulting from an unusually Received 6 June 2008 high hippopotamus (Hippopotamus amphibious) density in the Nhlanganzwane Dam, Kruger National Received in revised form Park, South Africa, triggered a chain of events characterised by an increase in the growth of primary 22 December 2008 producers (Microcystis aeruginosa). This increase in M. aeruginosa biomass was followed by bio- Accepted 24 December 2008 intoxication incidents in wild animals. In this study, we determine if a M. aeruginosa bloom with a total microcystin level of 23,718 mglÀ1 have been responsible for mortalities of megaherbivores in the Keywords: Nhlanganzwane Dam. We further use microcystin molecular markers derived from the mcy gene cluster Eutrophication to identify potentially toxigenic environmental Microcystis strains in the dam during the occurrence of Wild animal bio-intoxication animal intoxications.