-
Intraspecific variation in multiple trait responses of Alexandrium ostenfeldii towards elevated pCO2 Harmful Algae (IF 3.707) Pub Date : 2021-01-15 Karen M. Brandenburg; Bernd Krock; Helena C.L. Klip; Appy Sluijs; Paolina Garbeva; Dedmer B. Van de Waal
Dissolved oceanic CO2 concentrations are rising as result of increasing atmospheric partial pressure of CO2 (pCO2), which has large consequences for phytoplankton. To test how higher CO2 availability affects different traits of the toxic dinoflagellate Alexandrium ostenfeldii, we exposed three strains of the same population to 400 and 1,000 µatm CO2, and measured traits including growth rate, cell
-
Exposure to domoic acid is an ecological driver of cardiac disease in southern sea otters✰ Harmful Algae (IF 3.707) Pub Date : 2021-01-12 Megan E. Moriarty; M. Tim Tinker; Melissa A. Miller; Joseph A. Tomoleoni; Michelle M. Staedler; Jessica A. Fujii; Francesca I. Batac; Erin M. Dodd; Raphael M. Kudela; Vanessa Zubkousky-White; Christine K. Johnson
Harmful algal blooms produce toxins that bioaccumulate in the food web and adversely affect humans, animals, and entire marine ecosystems. Blooms of the diatom Pseudo-nitzschia can produce domoic acid (DA), a toxin that most commonly causes neurological disease in endothermic animals, with cardiovascular effects that were first recognized in southern sea otters. Over the last 20 years, DA toxicosis
-
The Latin America and Caribbean HAB status report based on OBIS and HAEDAT maps and databases Harmful Algae (IF 3.707) Pub Date : 2021-01-06 Inés Sunesen; Silvia M. Méndez; José Ernesto Mancera-Pineda; Marie-Yasmine Dechraoui Bottein; Henrik Enevoldsen
Harmful Algae Blooms (HAB) have been documented for at least fifty years in Latin America and the Caribbean (LAC), however, their impacts at social, ecological and economic levels are still little known. To contribute to the impact assessment of HABs in LAC region, the available information in HAEDAT, OBIS, CAREC, and CARPHA databases, and scientific literature was analyzed. This historical analysis
-
Development of fluorescence in situ hybridization (FISH) probes to detect and enumerate Gambierdiscus species Harmful Algae (IF 3.707) Pub Date : 2021-01-06 Kathleen J. Pitz; Mindy L. Richlen; Evangeline Fachon; Tyler B. Smith; Michael L. Parsons; Donald M. Anderson
-
Using a lake sediment record to infer the long-term history of cyanobacteria and the recent rise of an anatoxin producing Dolichospermum sp. Harmful Algae (IF 3.707) Pub Date : 2020-12-28 William O. Hobbs; Theo W. Dreher; Edward W. Davis; Rolf D. Vinebrooke; Siana Wong; Tim Weissman; Michael Dawson
Lakes that experience recurrent toxic cyanobacterial harmful algae blooms (cyanoHABS) are often subject to cultural eutrophication, where landscape development and upland activities increase the nutrient inputs to the water column and fuel cyanoHABS. Few studies have focused on the response of a lake to nutrient inputs for which the natural geomorphic setting predisposes a nutrient-rich water column
-
Oyster hatchery breakthrough of two HABs and potential effects on larval eastern oysters (Crassostrea virginica) Harmful Algae (IF 3.707) Pub Date : 2020-12-26 Sarah K.D. Pease; Kimberly S. Reece; Jeffrey O'Brien; Patrice L.M. Hobbs; Juliette L. Smith
-
The vulnerability of shellfish farmers to HAB events: An optimal matching analysis of closure decrees Harmful Algae (IF 3.707) Pub Date : 2020-12-24 Patrice Guillotreau; Véronique Le Bihan; Baptiste Morineau; Sophie Pardo
Harmful Algal Blooms (HAB) events may have serious economic consequences for shellfish farmers. When toxic algae blooms threaten human health, public authorities may decide to shut down the farming business for a while, i.e. ranging from a few days to several weeks or months, according to the severity of risks. The impact of closures being temporally and spatially distributed, shellfish farmers can
-
Dominance of harmful algae, Microcystis spp. and Micrasterias hardyi, has negative consequences for bivalves in a freshwater lake Harmful Algae (IF 3.707) Pub Date : 2020-12-21 Megumu Fujibayashi; Seiko Furuta; Eiso Inoue; Satoshi Ichise; Naoko Takei
The proliferation of cyanobacteria Microcystis spp. and the invading green alga Micrasterias hardyi in Lake Biwa has been increasing. However, the available knowledge on the dietary utilization of these cyanobacterial and algal species by bivalves, which are key species in lake ecosystems, is limited. In this study, we examined the dietary quality and utilization of these species by freshwater bivalves
-
Iningainema tapete sp. nov. (Scytonemataceae, Cyanobacteria) from greenhouses in central Florida (USA) produces two types of nodularin with biosynthetic potential for microcystin-LR and anabaenopeptin production Harmful Algae (IF 3.707) Pub Date : 2020-12-21 David E. Berthold; Forrest W. Lefler; I-Shuo Huang; Hussain Abdulla; Paul V. Zimba; H. Dail Laughinghouse
Iningainema is a recently described genus of heterocytous, false-branching cyanobacteria originally described from Australia. In this work, we present Iningainema tapete sp. nov., isolated from subaerial and terrestrial environments in central Florida (USA). In comparison to the sister species, our novel cyanobacterium produces nodularin-R (NOD-R) and a methylated isoform [MeAdda3] NOD previously not
-
Complete sequence and structure of the genome of the harmful algal bloom-forming cyanobacterium Planktothrix agardhii NIES-204T and detailed analysis of secondary metabolite gene clusters Harmful Algae (IF 3.707) Pub Date : 2020-12-15 Yohei Shimura; Takatomo Fujisawa; Yuu Hirose; Naomi Misawa; Yu Kanesaki; Yasukazu Nakamura; Masanobu Kawachi
Planktothrix species are distributed worldwide, and these prevalent cyanobacteria occasionally form potentially devastating toxic blooms. Given the ecological and taxonomic importance of Planktothrix agardhii as a bloom species, we set out to determine the complete genome sequence of the type strain Planktothrix agardhii NIES-204. Remarkably, we found that the 5S ribosomal RNA genes are not adjacent
-
Invasion and toxin production by exotic nostocalean cyanobacteria (Cuspidothrix, Cylindrospermopsis, and Sphaerospermopsis) in the Nakdong River, Korea Harmful Algae (IF 3.707) Pub Date : 2020-11-28 Yong-Jin Kim; Hae-Kyung Park; In-Soo Kim
The extent and frequency of harmful cyanobacterial blooms are increasing, owing to the climate change caused by global warming, and some harmful filamentous cyanobacteria that were first reported in the tropics are spreading to temperate regions, such as North America, Europe, and Northeast Asia. Although these exotic invasive cyanobacteria have a high toxigenic potential, they are not targeted in
-
Description of two new coexisting parasitoids of blooming dinoflagellates in the Baltic sea: Parvilucifera catillosa sp. nov. and Parvilucifera sp. (Perkinsea, Alveolata) Harmful Algae (IF 3.707) Pub Date : 2020-11-29 Elisabet Alacid; Albert Reñé; Rachele Gallisai; Aurora Paloheimo; Esther Garcés; Anke Kremp
Perkinsea are a group of intracellular protist parasites that inhabit all types of aquatic environments and cause significant population declines of a wide variety of hosts. However, the diversity of this lineage is mostly represented by environmental rDNA sequences. Complete descriptions of Perkinsea that infect marine dinoflagellates have increased in recent literature due to the identification,
-
Harmful algal blooms of Heterosigma akashiwo and environmental features regulate Mesodinium cf. rubrum abundance in eutrophic conditions Harmful Algae (IF 3.707) Pub Date : 2020-11-12 Daniel A. Lemley; Janine B. Adams; Gavin M. Rishworth; Duncan A. Purdie
Functional drivers of phytoplankton that can potentially form harmful algal blooms (HABs) are important to understand given the increased prevalence of anthropogenic modification and pressure on coastal habitats. However, teasing these drivers apart from other influences is problematic in natural systems, while laboratory assessments often fail to replicate relevant natural conditions. One such potential
-
Fluvial seeding of cyanobacterial blooms in oligotrophic Lake Superior Harmful Algae (IF 3.707) Pub Date : 2020-11-14 Kaitlin L. Reinl; Robert W. Sterner; Brenda Moraska Lafrancois; Sandra Brovold
Lake Superior has recently begun experiencing cyanobacterial blooms comprised of Dolichospermum lemmermannii near the Apostle Islands and along the southern shore of the western arm. Little is known about the origin of these blooms. Experiments were conducted during the summers of 2017 and 2018 to identify sources of propagules and characteristics of sites that were potential sources. The 2017 experiments
-
Strong constitutive expression divergence among strains but no evidence of differential expression associated with sexual reproduction in Alexandrium minutum Harmful Algae (IF 3.707) Pub Date : 2020-11-12 Julie Seveno; Yasmine Even; Mickael Le Gac
Sexual reproduction remains poorly characterized in dinoflagellates. This is especially the case at the molecular level. Here crossing experiments were performed among strains of the toxic dinoflagellate Alexandrium minutum belonging to two genetically divergent groups. Gene expression was compared between sexually compatible and incompatible crosses at the time of gamete fusion and resting cyst (~zygote)
-
Centrodinium punctatum (Dinophyceae) produces significant levels of saxitoxin and related analogs Harmful Algae (IF 3.707) Pub Date : 2020-11-13 Hyeon Ho Shin; Zhun Li; Damien Réveillon; Georges-Augustin Rovillon; Kenneth Neil Mertens; Philipp Hess; Hyun Jung Kim; Jihoon Lee; Kyun-Woo Lee; Daekyung Kim; Bum Soo Park; Jinik Hwang; Min Ho Seo; Weol Ae Lim
Centrodinium punctatum is a fusiform dinoflagellate with a global marine distribution. Due to a close phylogenetic relationship of one C. punctatum strain to Alexandrium species, toxin production of this C. punctatum strain was assessed using liquid chromatography coupled to tandem mass spectrometry. The paralytic shellfish toxin (PST) profile of C. punctatum was dominated by six analogs, i.e. STX
-
Stability issues of microcystins, anabaenopeptins, anatoxins, and cylindrospermopsin during short-term and long-term storage of surface water and drinking water samples Harmful Algae (IF 3.707) Pub Date : 2020-12-02 Quoc Tuc Dinh; Gabriel Munoz; Dana F. Simon; Sung Vo Duy; Barry Husk; Sébastien Sauvé
Reproducible analytical procedures and rigorous quality control are imperative for an accurate monitoring of cyanobacterial toxins in environmental water samples. In this study, the short-term and long-term storage stability of diverse cyanotoxins (anatoxins, cylindrospermopsin, anabaenopeptins, and 12 microcystins) was evaluated in water samples, under different scenarios. Transport controls were
-
First report of Alexandrium (Dinophyceae) associated with marine macroalgae off Japan: Diversity, distribution, and toxicity Harmful Algae (IF 3.707) Pub Date : 2020-11-13 Tomohiro Nishimura; Yuki Kuribara; Ryo Fukuzawa; Katsuya Mimura; Hiroshi Funaki; Kouki Tanaka; Ryuichi Watanabe; Hajime Uchida; Toshiyuki Suzuki; Masao Adachi
Macroalgal samples were collected from coastal waters in subboreal to subtropical zones in Japan (< 3–30 m depths) and 32 clonal strains of non-motile dinoflagellate-like protists were established. Molecular phylogenetic analyses of the LSU rDNA D1/D2, SSU rDNA, ITS region, and concatenated SSU rDNA + LSU rDNA D1/D2 sequences revealed that the strains nested within the genus Alexandrium. They were
-
Development of a high-resolution molecular marker for tracking Phaeocystis globosa genetic diversity through comparative analysis of chloroplast genomes Harmful Algae (IF 3.707) Pub Date : 2020-11-10 Huiyin Song; Feng Liu; Zelin Li; Qing Xu; Yang Chen; Zhiming Yu; Nansheng Chen
The phytoplankton Phaeocystis globosa thrives in a wide range of marine regions and plays an important role in climate control. It can also form harmful algal blooms (HABs) that threaten environments and impact important coastal infrastructures. Mechanisms underlying the formation of P. globosa blooms still remain poorly understood. Accumulating evidence suggests that P. globosa has high genetic diversity
-
Genotype and host microbiome alter competitive interactions between Microcystis aeruginosa and Chlorella sorokiniana Harmful Algae (IF 3.707) Pub Date : 2020-11-04 Kathryn C. Schmidt; Sara L. Jackrel; Derek J. Smith; Gregory J. Dick; Vincent J. Denef
Cyanobacterial harmful algal blooms (cyanoHABs) continue to increase in frequency and magnitude, threatening global freshwater ecosystems and services. In north-temperate lakes cyanobacteria appear in early summer, succeeding green algae as the dominant phytoplankton group, a pattern thought to be mediated by changes in temperature and bioavailable nutrients. To understand additional drivers of this
-
Molecular approach for analysis of in situ feeding by the dinoflagellate Noctiluca scintillans Harmful Algae (IF 3.707) Pub Date : 2020-11-04 Goh Nishitani; Masaomi Shiromoto; Waka Sato-Okoshi; Akira Ishikawa
The red tide forming heterotrophic dinoflagellate Noctiluca scintillans is common in temperate to tropical waters around the world. Understanding the in situ prey of N. scintillans is essential for elucidating its role in marine microbial food webs. In this study, we applied two polymerase chain reaction (PCR)-based cloning techniques, a predator-specific restriction enzyme, and a blocking primer.
-
Using flocculation and subsequent biomanipulation to control microcystis blooms: A laboratory study Harmful Algae (IF 3.707) Pub Date : 2020-11-03 Xin Zhou; Yixin He; Hong Li; Yanyan Wei; Lei Zhao; Guofeng Yang; Xudong Chen
-
Nutrient deficiency stimulates the production of superoxide in the noxious red-tide-forming raphidophyte Chattonella antiqua Harmful Algae (IF 3.707) Pub Date : 2020-11-02 Koki Yuasa; Tomoyuki Shikata; Takayoshi Ichikawa; Yu Tamura; Yoshitaka Nishiyama
The raphidophyte Chattonella antiqua is a single-celled alga that forms ‘red tides’ in coastal areas. C. antiqua produces superoxide anions (O2−), the excessive production of which has been associated with fish mortality. It is suggested that putative NADPH oxidase in the outer membrane oxidizes intracellular NADPH to produce O2− and secrete it externally. Earlier studies revealed that photosynthetic
-
Sensitivity to hydrogen peroxide of the bloom-forming cyanobacterium Microcystis PCC 7806 depends on nutrient availability Harmful Algae (IF 3.707) Pub Date : 2020-10-19 Giovanni Sandrini; Tim Piel; Tianshuo Xu; Emily White; Hongjie Qin; Pieter C. Slot; Jef Huisman; Petra M. Visser
Application of low concentrations of hydrogen peroxide (H2O2) is a relatively new and promising method to selectively suppress harmful cyanobacterial blooms, while minimizing effects on eukaryotic organisms. However, it is still unknown how nutrient limitation affects the sensitivity of cyanobacteria to H2O2. In this study, we compare effects of H2O2 on the microcystin-producing cyanobacterium Microcystis
-
Gambierdiscus and fukuyoa as potential indicators of ciguatera risk in the balearic islands Harmful Algae (IF 3.707) Pub Date : 2020-10-22 Àngels Tudó; Anna Toldrà; Maria Rey; Irene Todolí; Karl B. Andree; Margarita Fernández-Tejedor; Mònica Campàs; Francesc X. Sureda; Jorge Diogène
Gambierdiscus and Fukuyoa are genera of toxic dinoflagellates which were mainly considered as endemic to marine intertropical areas, and that are well known as producers of ciguatoxins (CTXs) and maitotoxins (MTXs). Ciguatera poisoning (CP) is a human poisoning occurring after the consumption of fish or more rarely, shellfish containing CTXs. The presence of these microalgae in a coastal area is an
-
Tracking Alexandrium catenella from seed-bed to bloom on the southern coast of Korea Harmful Algae (IF 3.707) Pub Date : 2020-10-23 Young Ok Kim; Jungmin Choi; Seung Ho Baek; Minji Lee; Hee-Mock Oh
Alexandrium catenella was tracked from seed-bed to bloom at a hot spot of cyst deposition on the southern coast of Korea from June 2016 to Feb. 2020. Changes in cyst abundance and germinability from sediment, as well as the vegetative cell abundance and encystment in the water column were intensively monitored. Cyst germination of ca. 73% occurred synchronously in November of 2016 to 2019, when bottom
-
Do toxic Pseudo-nitzschia species pose a threat to aquaculture in the southern Benguela eastern boundary upwelling system? Harmful Algae (IF 3.707) Pub Date : 2020-10-23 GC Pitcher; AD Cembella; B Krock; BM Macey; L Mansfield
The productive but highly exposed coastline of the southern Benguela eastern boundary upwelling system offers limited natural environment for aquaculture. Saldanha Bay located on the west coast of South Africa is one of the few embayments on the coastline that provides a productive and relatively sheltered environment suitable for the cultivation of shellfish. Consequently, bivalve culture in South
-
Monoculture-based consumer-resource models predict species dominance in mixed batch cultures of dinoflagellates Harmful Algae (IF 3.707) Pub Date : 2020-10-27 M. De Rijcke; J.M. Baert; N. Brion; M.B. Vandegehuchte; F. De Laender; C.R. Janssen
Global change will disturb the frequency, scale and distribution of harmful algal blooms (HABs), but we are unable to predict future HABs due to our limited understanding of how physicochemical changes in the environment affect interspecific competition between dinoflagellates. Trait-based mechanistic modelling is an important tool to unravel and quantify various direct and indirect interactions between
-
Random forest classification to determine environmental drivers and forecast paralytic shellfish toxins in Southeast Alaska with high temporal resolution Harmful Algae (IF 3.707) Pub Date : 2020-10-25 John R. Harley; Kari Lanphier; Esther Kennedy; Chris Whitehead; Allison Bidlack
Paralytic shellfish poison toxins (PSTs) produced by the dinoflagellate in the genus Alexandrium are a threat to human health and subsistence lifestyles in Southeast Alaska. It is important to understand the drivers of Alexandrium blooms to inform shellfish management and aquaculture, as well as to predict trends of PST in a changing climate. In this study, we aggregate environmental data sets from
-
Dynamics of an intense Alexandrium catenella red tide in the Gulf of Maine: satellite observations and numerical modeling Harmful Algae (IF 3.707) Pub Date : 2020-10-26 Yizhen Li; Richard P. Stumpf; D.J. McGillicuddy; Ruoying He
In July 2009, an unusually intense bloom of the toxic dinoflagellate Alexandrium catenella occurred in the Gulf of Maine. The bloom reached high concentrations (from hundreds of thousands to one million cells L−1) that discolored the water and exceeded normal bloom concentrations by a factor of 1000. Using Medium Resolution Imaging Spectrometer (MERIS) imagery processed to target chlorophyll concentrations
-
Uptake of Paralytic Shellfish Toxins by Blacklip Abalone (Haliotis rubra rubra Leach) from direct exposure to Alexandrium catenella microalgal cells and toxic aquaculture feed Harmful Algae (IF 3.707) Pub Date : 2020-10-27 Andreas Seger; Gustaaf Hallegraeff; David A.J. Stone; Matthew S. Bansemer; D. Tim Harwood; Alison Turnbull
The Tasmanian abalone fishery represents the largest wild abalone resource in the world, supplying close to 25% of the annual wild-caught global harvest. Prompted by the need to manage Paralytic Shellfish Toxin (PST) contamination of Blacklip Abalone (Haliotis rubra rubra) from east coast Tasmania, the uptake of toxins by this species is investigated in a land-based, controlled aquaculture setting
-
Contact micropredation may play a more important role than exotoxicity does in the lethal effects of Karlodinium australe blooms: Evidence from laboratory bioassays Harmful Algae (IF 3.707) Pub Date : 2020-10-28 Xiaoying Song; Zhangxi Hu; Lixia Shang; Chui Pin Leaw; Po Teen Lim; Ying Zhong Tang
Multiple dinoflagellate species from the genus Karlodinium have been well known to form massive and toxic blooms that consequently cause fish kills in many coastal waters around the world. Karlodinium australe is a mixotrophic and potentially ichthyotoxic species associated with fish kills. Here, we investigated phagotrophy of K. australe (isolate KaJb05) established from a bloom event in the West
-
Paralytic shellfish toxins and associated toxin profiles in bivalve mollusc shellfish from Argentina Harmful Algae (IF 3.707) Pub Date : 2020-10-16 Alejandra B. Goya; Sophie Tarnovius; Robert G. Hatfield; Lewis Coates; Adam M. Lewis; Andrew D. Turner
Paralytic Shellfish Poisoning is a potentially fatal syndrome, resulting from the filter-feeding activities of marine molluscs accumulating harmful neurotoxins naturally occurring in microalgae. Outbreaks are well recognised throughout most regions of the world, but with the highest levels of toxicity to date recorded in mussels from Argentina. Whilst toxicity has been documented for selected outbreaks
-
Can toxin warfare against fungal parasitism influence short-term Dolichospermum bloom dynamics? – A field observation Harmful Algae (IF 3.707) Pub Date : 2020-10-14 B. Weisbrod; E. Riehle; M. Helmer; D. Martin-Creuzburg; D.R. Dietrich
Cyanobacterial blooms often consist of numerous co-existing cyanobacterial species, with predominant taxa dynamically varying intra-annually. Parasitism by fungi (chytrids) has come into focus as an important factor driving short-term bloom dynamics. Using microscopic analysis, Illumina sequencing and cyanobacterial toxin analyses, we monitored the seasonal succession of Dolichospermum blooms in a
-
An approach for evaluating the economic impacts of harmful algal blooms: The effects of blooms of toxic Dinophysis spp. on the productivity of Scottish shellfish farms Harmful Algae (IF 3.707) Pub Date : 2020-10-14 Simone Martino; Fatima Gianella; Keith Davidson
Shellfish production is an important activity for the economy of many countries. As well as its direct value, it helps to stabilize communities in rural areas characterized by limited job opportunities. It is also important for consumers who recognize shellfish as a healthy product that gains its nutrition from natural plankton without the need for fertilizers, chemical treatments or other anthropogenic
-
Intermittent disturbance benefits colony size, biomass and dominance of Microcystis in Lake Taihu under field simulation condition Harmful Algae (IF 3.707) Pub Date : 2020-10-10 Guijun Yang; Xiangming Tang; Steven W. Wilhelm; Wenwen Pan; Zheng Rui; Lei Xu; Chunni Zhong; Xiquan Hu
-
Easy detection of karlodinium veneficum using PCR-based dot chromatography strip Harmful Algae (IF 3.707) Pub Date : 2020-10-07 Qixin Chen; Chunyun Zhang; Fuguo Liu; Hengyuan Ma; Yuanyuan Wang; Guofu Chen
In this study, a novel detection method by PCR-based dot chromatography strip (PDCS) is proposed. To investigate the application of PDCS in the detection of harmful microalgae, the internal transcribed spacer sequence of Karlodinium veneficum, one of the most common bloom-forming species, was cloned and sequenced to design and screen specific primers with tag sequences and probes, including gold nanoparticle
-
Dinophysis Ehrenberg (Dinophyceae) in Southern Chile harbours red cryptophyte plastids from Rhodomonas/Storeatula clade Harmful Algae (IF 3.707) Pub Date : 2020-10-06 Patricio A. Díaz; Concepción Fernández-Pena; Iván Pérez-Santos; Ángela Baldrich; Manuel Díaz; Francisco Rodríguez
Photosynthetic species of the dinoflagellate genus Dinophysis are known to retain temporary cryptophyte plastids of the Teleaulax/Plagioselmis/Geminigera clade after feeding the ciliate Mesodinium rubrum. In the present study, partial plastid 23S rDNA sequences were retrieved in Southern Chilean waters from oceanic (Los Lagos region), and fjord systems (Aysén region), in single cells of Dinophysis
-
Karmitoxin production by Karlodinium armiger and the effects of K. armiger and karmitoxin towards fish Harmful Algae (IF 3.707) Pub Date : 2020-09-29 Sofie Bjørnholt Binzer; Elisabeth Varga; Aaron John Christian Andersen; Daniel Killerup Svenssen; Lívia Soman de Medeiros; Silas Anselm Rasmussen; Thomas Ostenfeld Larsen; Per Juel Hansen
-
Advances in forecasting harmful algal blooms using machine learning models: A case study with Planktothrix rubescens in Lake Geneva Harmful Algae (IF 3.707) Pub Date : 2020-09-29 Jonathan Derot; Hiroshi Yajima; Stéphan Jacquet
The development of anthropic activities during the 20th century increased the nutrient fluxes in freshwater ecosystems, leading to the eutrophication phenomenon that most often promotes harmful algal blooms (HABs). Recent years have witnessed the regular and massive development of some filamentous algae or cyanobacteria in Lake Geneva. Consequently, important blooms could result in detrimental impacts
-
Ciguatera poisonings: A global review of occurrences and trends Harmful Algae (IF 3.707) Pub Date : 2020-09-22 M. Chinain; C.M.i. Gatti; H.T. Darius; J.-P. Quod; P.A. Tester
Ciguatera Poisoning (CP) is the most prevalent, phycotoxin related seafood poisoning across the globe, affecting between 10,000 and 50,000 people annually. This illness results from the consumption of seafood contaminated with lipid soluble toxins known as ciguatoxins (CTXs) that are produced by benthic dinoflagellates in the genera Gambierdiscus and Fukuyoa. The present work reviews the global occurrence
-
Morphological and phylogenetic data do not support the split of Alexandrium into four genera Harmful Algae (IF 3.707) Pub Date : 2020-09-18 Kenneth Neil Mertens, Masao Adachi, Donald M. Anderson, Christine J. Band-Schmidt, Isabel Bravo, Michael L. Brosnahan, Christopher J.S. Bolch, António J. Calado, M. Consuelo Carbonell-Moore, Nicolas Chomérat, Malte Elbrächter, Rosa Isabel Figueroa, Santiago Fraga, Ismael Gárate-Lizárraga, Esther Garcés, Haifeng Gu, Gustaaf Hallegraeff, Philipp Hess, Shauna Murray
A recently published study analyzed the phylogenetic relationship between the genera Centrodinium and Alexandrium, confirming an earlier publication showing the genus Alexandrium as paraphyletic. This most recent manuscript retained the genus Alexandrium, introduced a new genus Episemicolon, resurrected two genera, Gessnerium and Protogonyaulax, and stated that: “The polyphyly [sic] of Alexandrium
-
Is a delay a disaster? economic impacts of the delay of the california dungeness crab fishery due to a harmful algal bloom Harmful Algae (IF 3.707) Pub Date : 2020-09-17 Daniel S. Holland, Jerry Leonard
During the 2015/2016 West Coast Dungeness crab (Metacarcinus magister) season, the opening of the fishery in California was delayed almost five months due to high and persistent concentrations of domoic acid in crab following a massive coast-wide Pseudo-nitzschia australis (P. australis) bloom. A hurdle model was used to estimate lost revenues to fishers due to the delay in the opening of the 2015/2016
-
Marine harmful algal blooms and human health: A systematic scoping review Harmful Algae (IF 3.707) Pub Date : 2020-09-17 Nick Young, Richard A. Sharpe, Rosa Barciela, Gordon Nichols, Keith Davidson, Elisa Berdalet, Lora E. Fleming
Exposure to harmful algal blooms (HABs) can lead to well recognised acute patterns of illness in humans. The objective of this scoping review was to use an established methodology and the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) reporting framework to map the evidence for associations between marine HABs and observed both acute and chronic human health effects. A
-
The 5S rRNA genes in Alexandrium: their use as a FISH chromosomal marker in studies of the diversity, cell cycle and sexuality of dinoflagellates Harmful Algae (IF 3.707) Pub Date : 2020-09-16 Alfredo de Bustos, Rosa I Figueroa, Marta Sixto, Isabel Bravo, Ángeles Cuadrado
Chromosomal markers of the diversity and evolution of dinoflagellates are scarce because the genomes of these organisms are unique among eukaryotes in terms of their base composition and chromosomal structure. Similarly, a lack of appropriate tools has hindered studies of the chromosomal localization of 5S ribosomal DNA (rDNA) in the nucleosome-less chromosomes of dinoflagellates. In this study, we
-
Occurrence of Pseudo-nitzschia species and associated domoic acid production along the Guangdong coast, South China Sea Harmful Algae (IF 3.707) Pub Date : 2020-09-10 Huan Chang Dong, Nina Lundholm, Sing Tung Teng, Aifeng Li, Chao Wang, Yang Hu, Yang Li
-
Seasonal dynamics of terrestrially sourced nitrogen influenced Karenia brevis blooms off Florida's southern Gulf Coast Harmful Algae (IF 3.707) Pub Date : 2020-09-09 Miles Medina, Ray Huffaker, James W. Jawitz, Rafael Muñoz-Carpena
Harmful algal blooms (HABs) threaten coastal ecological systems, public health, and local economies, but the complex physical, chemical, and biological processes that culminate in HABs vary by locale and are often poorly understood. Despite broad recognition that cultural eutrophication may exacerbate nearshore bloom events, the association is typically not linear and is often difficult to quantify
-
Harmful algal blooms of the Benguela eastern boundary upwelling system Harmful Algae (IF 3.707) Pub Date : 2020-09-03 Grant C. Pitcher; Deon C. Louw
The Benguela Upwelling System (BUS) is subject to a high incidence of HABs. Of the major shellfish poisoning syndromes associated with HABs, Paralytic and Diarrhetic Shellfish Poisoning (PSP and DSP) pose the greatest concern, but as documented herein there are several other HAB organisms that are also present. Blooms of Alexandrium catenella have been recognised as the typical cause of PSP since 1948
-
The effects of prolonged exposure to hypoxia and Florida red tide (Karenia brevis) on the survival and activity of stone crabs Harmful Algae (IF 3.707) Pub Date : 2020-09-02 Philip M. Gravinese, Mary Kate Munley, Grace Kahmann, Cody Cole, Vincent Lovko, Patricia Blum, Richard Pierce
Florida red tides are harmful algae blooms caused by the dinoflagellate Karenia brevis, which occur along Florida's gulf coast almost annually. In recent years Florida red tide blooms have become more common, frequent, and intense. Florida's southwest coast, from Manatee to Collier County, has experienced repeated and prolonged K. brevis blooms since 2011 with the most recent bloom in 2017 lasting
-
Cyanotoxin cylindrospermopsin producers and the catalytic decomposition process: A review. Harmful Algae (IF 3.707) Pub Date : 2020-09-01 Michal Adamski, Konrad Wołowski, Ariel Kaminski, Alica Hindáková
Cylindrospermopsin (CYN) is a toxic secondary metabolite produced by several freshwater species of cyanobacteria. Its high chemical stability and wide biological activity pose a series of threats for human and animal morbidity and mortality. The biggest risk of CYN exposure for human organism comes from the consumption of contaminated water, fish or seafood. Very important for effective monitoring
-
Organic polymer consumption facilitates domoic acid entry into the marine food web without direct ingestion of Pseudo-nitzschia Harmful Algae (IF 3.707) Pub Date : 2020-08-30 Israel A. Marquez, Ann Abraham, Jeffrey W. Krause
Domoic acid (DA) is a neurotoxin produced by diatoms from the genera Pseudo-nitzschia and Nitzschia. DA is transferred through the food web when consumed by organisms such as copepods (e.g., Acartia tonsa). DA bioaccumulates in higher trophic levels and poses a threat to human health through amnesic shellfish poisoning. Laboratory experiments using a DA reference standard demonstrated that mild turbulence
-
The Influence of the Toxin Producing Dinoflagellate, Alexandrium catenella (1119/27), on the Feeding and Survival of the Marine Copepod, Acartia tonsa Harmful Algae (IF 3.707) Pub Date : 2020-08-29 Ali H. Abdulhussain, Kathryn B. Cook, Andrew D. Turner, Adam M. Lewis, Mohamed A. Elsafi, Daniel J. Mayor
Blooms of harmful algae are increasing globally, yet their impacts on copepods, an important link between primary producers and higher trophic levels, remain largely unknown. Algal toxins may have direct, negative effects on the survival of copepods. They may also indirectly affect copepod survival by deterring feeding and thus decreasing the availability of energy and nutritional resources. Here we
-
Growth response of Dinophysis, Mesodinium, and Teleaulax cultures to temperature, irradiance, and salinity Harmful Algae (IF 3.707) Pub Date : 2020-08-29 James M. Fiorendino, Juliette L. Smith, Lisa Campbell
Mixotrophic Dinophysis species threaten human health and coastal economies through the production of toxins which cause diarrhetic shellfish poisoning (DSP) in humans. Novel blooms of Dinophysis acuminata and Dinophysis ovum have occurred in North American waters in recent decades, resulting in the closure of shellfish harvesting. Understanding the ecology of Dinophysis species and their prey is essential
-
Taxonomic and Genotypical Heterogeneity of Microcystin degrading Bacterioplankton in Western Lake Erie Harmful Algae (IF 3.707) Pub Date : 2020-08-29 Anjali Krishnan, Yuqin Zhang, Meaghan Balaban, Youngwoo Seo, Xiaozhen Mou
Microcystins (MCs) are among the predominant cyanotoxins that are primarily degraded by heterotrophic bacteria in various freshwater environments, including Lake Erie, a Laurentian Great Lake. However, despite the prevalence of MCs in Lake Erie basins, our knowledge about the taxonomic diversity of local MC-degrading bacteria is largely limited. The current study obtained thirty-four MC-degrading bacterial
-
Characterization of the development stages and roles of nutrients and other environmental factors in green tides in the Southern Yellow Sea, China Harmful Algae (IF 3.707) Pub Date : 2020-08-24 Haibo Zhang, Guoshan Wang, Chuansong Zhang, Rongguo Su, Xiaoyong Shi, Xiulin Wang
Large-scale floating green tides in the Southern Yellow Sea (SYS) caused by the macroalgal species Ulva prolifera have been recurring for 13 years and have become one of the greatest marine ecological disasters in the world. In this study, we attempt to explore the development pattern of green tides and find its key environmental influencing factors. The satellite remote sensing data of the development
-
Unraveling the Karenia selliformis complex with the description of a non-gymnodimine producing Patagonian phylotype Harmful Algae (IF 3.707) Pub Date : 2020-08-20 Jorge I. Mardones, Luis Norambuena, Javier Paredes, Gonzalo Fuenzalida, Juan José Dorantes-Aranda, Kim J. Lee Chang, Leonardo Guzmán, Bernd Krock, Gustaaf Hallegraeff
Karenia selliformis is a bloom-forming toxic dinoflagellate known for production of gymnodimines (GYMs) and causing mass mortalities of marine fauna. Blooms have been reported from coastal waters of New Zealand, Mexico, Tunisia, Kuwait, Iran, China and Chile. Based on molecular phylogeny, morphology, toxin production, pigment composition and cell growth of Chilean K. selliformis isolated in 2018 (CREAN_KS01
-
Phylogeographic, toxicological and ecological evidence for the global distribution of Raphidiopsis raciborskii and its northernmost presence in Lake Nero, Central Western Russia Harmful Algae (IF 3.707) Pub Date : 2020-08-17 Sergey Sidelev, Olga Koksharova, Olga Babanazarova, Jutta Fastner, Ekaterina Chernova, Evgeniy Gusev
Raphidiopsis raciborskii is a freshwater, potentially toxigenic cyanobacterium, originally described as a tropical species that is spreading to northern regions over several decades. The ability of R. raciborskii to produce cyanotoxins – in particular the alkaloid cylindrospermopsin (CYN), which is toxic to humans and animals – is of serious concern. The first appearance of R. raciborskii in Russia
-
Taxonomy and toxicity of a bloom-forming Ostreopsis species (Dinophyceae, Gonyaulacales) in Tahiti island (South Pacific Ocean): one step further towards resolving the identity of O. siamensis. Harmful Algae (IF 3.707) Pub Date : 2020-08-13 Nicolas Chomérat, Gwenael Bilien, Jérôme Viallon, Fabienne Hervé, Damien Réveillon, Kévin Henry, Mayalen Zubia, Christophe Vieira, André Ung, Clémence Mahana iti Gatti, Mélanie Roué, Amélie Derrien, Zouher Amzil, Hélène Taiana Darius, Mireille Chinain
Among dinoflagellates responsible for benthic harmful algal blooms, the genus Ostreopsis primarily described from tropical areas has been increasingly reported from subtropical and temperate areas worldwide. Several species of this toxigenic genus produce analogs of palytoxin, thus representing a major threat to human and environmental health. The taxonomy of several species needs to be clarified as
-
Cyclic imine toxins survey in coastal european shellfish samples: Bioaccumulation and mode of action of 28-O-palmitoyl ester of pinnatoxin-G. first report of portimine-A bioaccumulation. Harmful Algae (IF 3.707) Pub Date : 2020-08-12 Rómulo Aráoz, Paul Barnes, Véronique Séchet, Muriel Delepierre, Sophie Zinn-Justin, Jordi Molgó, Armen Zakarian, Philipp Hess, Denis Servent
Cyclic imine toxins exhibit fast acting neurotoxicity and lethality by respiratory arrest in mice explained by their potent antagonistic activity against muscular nicotinic acetylcholine receptors. We performed a survey of gymnodimine-A, 13-desmethyl spirolide-C, 13,19-didesmethyl spirolide-C, 20-methyl spirolide-G, pinnatoxin-A, pinnatoxin-G, portimine-A and 28-O-palmitoyl ester of pinnatoxin-G in