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Response of the toxic dinoflagellate Alexandrium minutum to exudates of the eelgrass Zostera marina Harmful Algae (IF 6.6) Pub Date : 2024-03-01 Alexandra Díaz-Alonso, Francisco Rodríguez, Pilar Riobó, Xose Álvarez-Salgado, Eva Teira, Emilio Fernández
Biotic interactions are a key factor in the development of harmful algal blooms. Recently, a lower abundance of planktonic dinoflagellates has been reported in areas dominated by seagrass beds, suggesting a negative interaction between both groups of organisms. The interaction between planktonic dinoflagellates and marine phanerogams, as well as the way in which bacteria can affect this interaction
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Sources and profiles of toxins in shellfish from the south-central coast of Chile (36°‒ 43° S) Harmful Algae (IF 6.6) Pub Date : 2024-02-28 Luis Norambuena-Subiabre, Pamela Carbonell, Pablo Salgado, Claudia Zamora, Oscar Espinoza-González
The study of marine toxins in shellfish is of the utmost importance to ensure people's food safety. Marine toxins in shellfish and microalgae in the water column off the south-central coast of Chile (36°‒43° S) were studied in a network of 64 stations over a 14-month period. The relative abundance of harmful species group and group was analyzed. The detection and quantification of lipophilic toxins
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Mesocosm study of PAC-modified clay effects on Karenia brevis cells and toxins, chemical dynamics, and benthic invertebrate physiology Harmful Algae (IF 6.6) Pub Date : 2024-02-28 Victoria M. Devillier, Emily R. Hall, Vince Lovko, Richard Pierce, Donald M. Anderson, Kristy A. Lewis
Modified clay compounds are used globally as a method of controlling harmful algal blooms, and their use is currently under consideration to control blooms in Florida, USA. In 1400 L mesocosm tanks, chemical dynamics and lethal and sublethal impacts of MC II, a polyaluminum chloride (PAC)-modified kaolinite clay, were evaluated over 72 h on a benthic community representative of Sarasota Bay, which
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Development of saxitoxin biosynthesis gene sxtB-targeted qPCR assay for the quantification of toxic dinoflagellates Alexandrium catenella (group I) and A. pacificum (group IV) occurring in the Korean coast Harmful Algae (IF 6.6) Pub Date : 2024-02-24 Han-Sol Kim, Taehee Kim, Jaeyeon Park, Tae Gyu Park, Jang-Seu Ki
Toxic dinoflagellate can produce saxitoxins (STXs) and cause paralytic shellfish poisoning (PSP), and thus they are monitored for environmental safety management. Microscopic discrimination of dinoflagellates is difficult to distinguish between toxic and non-toxic species due to their similar morphology. Meanwhile, an alternative quantitative PCR (qPCR) assay is sensitive, rapid, and cost-effective
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The amnesic shellfish poisoning toxin, domoic acid: The tattoo of the king scallop Pecten maximus Harmful Algae (IF 6.6) Pub Date : 2024-02-24 José Luis García-Corona, Caroline Fabioux, Jean Vanmaldergem, Sylvain Petek, Amélie Derrien, Aouregan Terre-Terrillon, Laura Bressolier, Florian Breton, Hélène Hegaret
Domoic acid (DA) is a potent neurotoxin produced by diatoms of the genus and is responsible for Amnesic Shellfish Poisoning (ASP) in humans. Some fishery resources of high commercial value, such as the king scallop , are frequently exposed to toxic blooms and are capable of accumulating high amounts of DA, retaining it for months or even a few years. This poses a serious threat to public health and
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Population dynamics of dominant dinoflagellate species in the North Sea: in situ growth rates, photosynthetic potential, and losses due to parasitism Harmful Algae (IF 6.6) Pub Date : 2024-02-20 Eva Pérez Blanco, Paulo Sérgio Salomon, Per Carlsson, Cathérine Legrand, Edna Granéli
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Transcriptome analysis of the harmful alga Heterosigma akashiwo under a 24-hour light-dark cycle Harmful Algae (IF 6.6) Pub Date : 2024-02-15 Nanjing Ji, Junyue Wang, Wencong Huang, Jinwang Huang, Yuefeng Cai, Song Sun, Xin Shen, Yue Liang
The photoperiod, which is defined as the period of time within a 24-hour time frame that light is available, is an important environmental regulator of several physiological processes in phytoplankton, including harmful bloom-forming phytoplankton. The ichthyotoxic raphidophyte is a globally distributed bloom-forming phytoplankton. Despite extensive studies on the ecological impact of , the influence
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A Pseudo-nitzschia metabarcoding approach with a calibrated ITS1 reference sequence database applied in the Taiwan Strait Harmful Algae (IF 6.6) Pub Date : 2024-02-11 Biaobiao Niu, Jinxiu Pang, Nina Lundholm, Cuiwen Liang, Sing Tung Teng, Qixiang Zheng, Xin Guo, Yang Li
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What makes a cyanobacterial bloom disappear? A review of the abiotic and biotic cyanobacterial bloom loss factors Harmful Algae (IF 6.6) Pub Date : 2024-02-09 Ted D. Harris, Kaitlin L. Reinl, Marzi Azarderakhsh, Stella A. Berger, Manuel Castro Berman, Mina Bizic, Ruchi Bhattacharya, Sarah H. Burnet, Jacob A. Cianci-Gaskill, Lisette N. de Senerpont Domis, Inge Elfferich, K. Ali Ger, Hans-Peter F. Grossart, Bas W. Ibelings, Danny Ionescu, Zohreh Mazaheri Kouhanestani, Jonas Mauch, Yvonne R. McElarney, Veronica Nava, Rebecca L. North, Igor Ogashawara, Ma. Cristina
Cyanobacterial blooms present substantial challenges to managers and threaten ecological and public health. Although the majority of cyanobacterial bloom research and management focuses on factors that control bloom initiation, duration, toxicity, and geographical extent, relatively little research focuses on the role of loss processes in blooms and how these processes are regulated. Here, we define
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Toxins and Biliary Atresia: Is Karenia Brevis (Red Tide) The Culprit? Harmful Algae (IF 6.6) Pub Date : 2024-02-08 Rita Wyrebek, Jamie L. Fierstein, Rebecca G. Wells, Joana Machry, Sara Karjoo
The study objective was to evaluate the association between exposure during pregnancy and the prevalence of biliary atresia (BA) in offspring. This was a hospital-based, case-control study in which cases were infants diagnosed with BA at Johns Hopkins All Children's Hospital from October 2001 to December 2019. Cases were matched 1:4 by age to controls who were randomly selected from a pool of healthy
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Long-term stability of the genome structure of the cyanobacterium, Dolichospermum in a deep German lake Harmful Algae (IF 6.6) Pub Date : 2024-02-07 J.N. Woodhouse, M.A. Burford, B.A. Neilan, A. Jex, S. Tichkule, K. Sivonen, D.P. Fewer, H-P Grossart, A. Willis
is a cyanobacterial genus commonly associated with toxic blooms in lakes and brackish water bodies worldwide, and is a long-term resident of Lake Stechlin, northeastern Germany. In recent decades, shifts in the phosphorus loading and phytoplankton species composition have seen increased biomass of during summer blooms from 1998, peaking around 2005, and declining after 2020. Cyanobacteria are known
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Bacterial community shifts induced by high concentration hydrogen peroxide treatment of Microcystis bloom in a mesocosm study Harmful Algae (IF 6.6) Pub Date : 2024-02-05 Taylor L. Hancock, Elizabeth K. Dahedl, Michael A. Kratz, Hidetoshi Urakawa
Hydrogen peroxide has gained popularity as an environmentally friendly treatment for cyanobacterial harmful algal blooms (cHABs) that takes advantage of oxidative stress sensitivity in cyanobacteria at controlled concentrations. Higher concentrations of hydrogen peroxide treatments may seem appealing for more severe cHABs but there is currently little understanding of the environmental impacts of this
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Mechanisms of harmful effects of Microcystis aeruginosa on a brackish water organism Moina mongolica based on physiological and transcriptomic responses Harmful Algae (IF 6.6) Pub Date : 2024-02-03 Hongtao Liu, Hao Xing, Zhangyi Xia, Tingting Wu, Jinlin Liu, Aiqin Li, Fangling Bi, Yuqing Sun, Jianheng Zhang, Peimin He
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Physical drivers of Noctiluca scintillans (Dinophyceae) blooms outbreak in the northern Taiwan Strait: A numerical study Harmful Algae (IF 6.6) Pub Date : 2024-02-03 Zhonghao Lin, Peng Zhan, Jianping Li, Jun Sasaki, Zhongfeng Qiu, Chun Chen, Shuangyan Zou, Xiaotong Yang, Haifeng Gu
The red () blooms often break out near Pingtan Island, in the northern Taiwan Strait from April to June. It is essential to gain insights into their formation mechanism to predict and provide early warnings for these blooms. Previous studies and observations showed that blooms are the most likely to occur when winds are weak and shifting in direction. To explore this phenomenon further, we employed
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Shifts in phytoplankton and zooplankton communities in three cyanobacteria-dominated lakes after treatment with hydrogen peroxide Harmful Algae (IF 6.6) Pub Date : 2024-01-23 Tim Piel, Giovanni Sandrini, Erik F.J. Weenink, Hongjie Qin, Maria J. van Herk, Mariël Léon Morales-Grooters, J. Merijn Schuurmans, Pieter C. Slot, Geert Wijn, Jasper Arntz, Sevasti-Kiriaki Zervou, Triantafyllos Kaloudis, Anastasia Hiskia, Jef Huisman, Petra M. Visser
Cyanobacteria can reach high densities in eutrophic lakes, which may cause problems due to their potential toxin production. Several methods are in use to prevent, control or mitigate harmful cyanobacterial blooms. Treatment of blooms with low concentrations of hydrogen peroxide (H2O2) is a promising emergency method. However, effects of H2O2 on cyanobacteria, eukaryotic phytoplankton and zooplankton
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The human health effects of harmful algal blooms in Florida: The importance of high resolution data Harmful Algae (IF 6.6) Pub Date : 2024-01-17 Andrew Bechard, Corey Lang
Harmful algal blooms (HABs) have been found to cause increases in healthcare visits for a variety of illnesses to humans if exposure and contact is sufficient. We use a more comprehensive dataset than previously implemented in prior literature to better isolate visits by healthcare facility type and proximity to bloom. Using a difference-in-differences model, our results suggest HABs cause an increase
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Benthic cyanobacterial metabolites interact to reduce coral larval survival and settlement Harmful Algae (IF 6.6) Pub Date : 2024-01-17 Camille Vizon, Axel Urbanowiez, Delphine Raviglione, Isabelle Bonnard, Maggy M. Nugues
Benthic cyanobacterial mats (BCMs) are becoming increasingly abundant on coral reefs worldwide. High growth rates and prolific toxin production give them the potential to cause widespread coral recruitment failure through allelopathic effects, but few studies have made the link between their toxicity for coral larvae and in situ toxin concentrations. Here we investigated the allelopathic effects of
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Current status and prognosis of Raphidiopsis raciborskii distribution in Bulgaria as part of the southeastern region of Europe Harmful Algae (IF 6.6) Pub Date : 2024-01-21 Detelina Belkinova, Desislava Stoianova, Mihaela Beshkova, Stefan Kazakov, Plamen Stoyanov, Rumen Mladenov
The cyanobacterial species Raphidiopsis raciborskii (Wołoszyńska) Aguilera et al. has a high invasiveness potential, which in less than a century leads to its cosmopolitan spread. In the temperate climate of Europe, R. raciborskii has been reported in many countries, but there is still a lack of detailed information about the current status of its distribution in lakes of Bulgaria, as a part of the
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Indole-3-acetic acid promotes growth in bloom-forming Microcystis via an antioxidant response Harmful Algae (IF 6.6) Pub Date : 2024-01-20 Hunter R. Baylous, Matthew F. Gladfelter, Malia I. Gardner, Madalynn Foley, Alan E. Wilson, Morgan M. Steffen
Interactions between bacteria and phytoplankton in the phycosphere facilitate and constrain biogeochemical cycling in aquatic ecosystems. Indole-3-acetic acid (IAA) is a bacterially produced chemical signal that promotes growth of phytoplankton and plants. Here, we explored the impact of IAA on bloom-forming cyanobacteria and their associated bacteria. Exposure to IAA and its precursor, tryptophan
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Modeling the dynamics of harmful algal bloom events in two bays from the northern Chilean upwelling system Harmful Algae (IF 6.6) Pub Date : 2024-01-20 Sergio A. Rosales, Patricio A. Díaz, Práxedes Muñoz, Gonzalo Álvarez
The bays of Tongoy and Guanaqueros are located in the Humboldt Current system, where Argopecten purpuratus has been the subject of intense aquaculture development. These bays lie in one of the most productive marine ecosystems on Earth and are dominated by permanent coastal upwelling at Lengua de Vaca Point and Choros Point, one of the three upwelling centers on the Chilean coast. Significantly, this
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Multispecies mass mortality in the Beagle Channel associated with paralytic shellfish toxins Harmful Algae (IF 6.6) Pub Date : 2024-01-18 A.M. Cadaillon, B. Mattera, A. Albizzi, N. Montoya, S. Maldonado, A. Raya Rey, L. Riccialdelli, G.O. Almandoz, I.R. Schloss
The Beagle Channel is a Subantarctic semi-estuarine environment at the southern tip of South America, where intoxication events associated with harmful algal blooms have been reported since 1886, including a world record in toxicity due to Alexandrium catenella in 1992. Toxic algae affect public health and ecosystem services, particularly mussel aquaculture and fisheries management. During the austral
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Morphology, phylogeny, and host range of the novel early-diverging oomycete Sirolpidium dinoletiferum sp. nov. parasitizing marine dinoflagellates Harmful Algae (IF 6.6) Pub Date : 2024-01-12 Boo Seong Jeon, Myung Gil Park
Oomycetes are fungus-like heterotrophic organisms with a broad environmental distribution, including marine, freshwater, and terrestrial habitats. They function as saprotrophs that use the remains of other organisms or as parasites of a variety of eukaryotes, including protists, diatoms, dinoflagellates, macroalgae, plants, fungi, animals, and even other oomycetes. Among the protist hosts, the taxonomy
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Comparative genomic analysis of Microcystis strain diversity using conserved marker genes Harmful Algae (IF 6.6) Pub Date : 2024-01-11 E. Anders Kiledal, Laura A. Reitz, Esmée Q. Kuiper, Jacob Evans, Ruqaiya Siddiqui, Vincent J. Denef, Gregory J. Dick
Microcystis-dominated cyanobacterial harmful algal blooms (cyanoHABs) have a global impact on freshwater environments, affecting both wildlife and human health. Microcystis diversity and function in field samples and laboratory cultures can be determined by sequencing whole genomes of cultured isolates or natural populations, but these methods remain computationally and financially expensive. Amplicon
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The Occurrence of Karenia species in mid-Atlantic coastal waters: Data from the Delmarva Peninsula, USA Harmful Algae (IF 6.6) Pub Date : 2024-01-10 Jennifer L. Wolny, Edward B. Whereat, Todd A. Egerton, Leah A. Gibala-Smith, John R. McKay, Judith M. O'Neil, Catherine E. Wazniak, Margaret R. Mulholland
A bloom of Karenia papilionacea that occurred along the Delaware coast in late summer of 2007 was the first Karenia bloom reported on the Delmarva Peninsula (Delaware, Maryland, and Virginia, USA). Limited spatial and temporal monitoring conducted by state agencies and citizen science groups since 2007 have documented that several Karenia species are an annual component of the coastal phytoplankton
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Effects of culture conditions on the growth of the benthic dinoflagellates Ostreopsis cf. ovata, Prorocentrum lima and Coolia malayensis (Dinophyceae): A global review Harmful Algae (IF 6.6) Pub Date : 2024-01-02 Alexandra Grigoriyan, Maria Lucia Lorini, Marcos de Souza Lima Figueiredo, Eliliane Vasconcelos Corrêa Almada, Silvia M. Nascimento
Benthic dinoflagellates produce potent toxins that may negatively affect humans and the marine biota. Understanding the factors that stimulate their growth is important for management strategies and to reduce their potential negative impacts. Laboratory cultures have been extensively used to study microalgae physiology and characterize life cycles, nutrition, growth rates, among other processes. A
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The high molecular diversity in Noctiluca scintillans is dominated by intra-genomic variations revealed by single cell high-throughput sequencing of 18S rDNA V4 Harmful Algae (IF 6.6) Pub Date : 2024-01-06 Kuiyan Liu, Xianliang Huang, Xiangxiang Ding, Nansheng Chen
The application of high-throughput sequencing (HTS) technologies has revolutionized research on phytoplankton biodiversity by generating an unprecedented amount of molecular data in marine ecosystem surveys. However, high-level of molecular diversity uncovered in HTS-based metabarcoding analyses may lead to overinterpretation of phytoplankton diversity due to excessive intra-genomic variations (IGVs)
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Pelagic Sargassum in the Gulf of Mexico driven by ocean currents and eddies Harmful Algae (IF 6.6) Pub Date : 2024-01-01 Yingjun Zhang, Chuanmin Hu, Dennis J. McGillicuddy, Brian B. Barnes, Yonggang Liu, Vassiliki H. Kourafalou, Shuai Zhang, Frank J. Hernandez
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A paleoecological investigation of recent cyanobacterial blooms and their drivers in two contrasting lakes Harmful Algae (IF 6.6) Pub Date : 2023-12-19 Caitlin Wheeler, John K. Pearman, Jamie D. Howarth, Marcus J. Vandergoes, Katherine Holt, Steven A. Trewick, Xun Li, Lucy Thompson, Georgia Thomson-Laing, Mailys Picard, Chris Moy, Nicholas P. Mckay, Adelaine Moody, Claire Shepherd, Valerie van den Bos, Konstanze Steiner, Susanna A Wood
Cyanobacterial blooms are one of the most significant threats to global water security and freshwater biodiversity. Interactions among multiple stressors, including habitat degradation, species invasions, increased nutrient runoff, and climate change, are key drivers. However, assessing the role of anthropogenic activity on the onset of cyanobacterial blooms and exploring response variation amongst
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The influence of the toxin-producing dinoflagellate, Alexandrium catenella, on feeding, reproduction and toxin retention in Calanus helgolandicus Harmful Algae (IF 6.6) Pub Date : 2023-12-23 Ali H. Abdulhussain, Kathryn B. Cook, Eileen Bresnan, Jean-Pierre Lacaze, Daniel J. Mayor
Copepods of the genus Calanus dominate the biomass of pelagic ecosystems from the Mediterranean Sea up into the Arctic Ocean and form an important link between phytoplankton and higher trophic levels. Impacts from toxin-producing harmful algae (HA) have been recorded throughout this region over the last 50 years, with potentially negative effects on Calanus spp. populations and the ecosystem functions
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CiguaMOD I: A conceptual model of ciguatoxin loading in the Greater Caribbean Region Harmful Algae (IF 6.6) Pub Date : 2023-12-19 Michael L. Parsons, Mindy L. Richlen, Tyler B. Smith, Donald M. Anderson, Ashley L. Abram, Deana L. Erdner, Alison Robertson
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Gambierdiscus species diversity and community structure in St. Thomas, USVI and the Florida Keys, USA Harmful Algae (IF 6.6) Pub Date : 2023-12-19 Mindy L. Richlen, Kali Horn, Victoria Uva, Evangeline Fachon, Sarah L. Heidmann, Tyler B. Smith, Michael L. Parsons, Donald M. Anderson
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Marine phycotoxin levels in shellfish—14 years of data gathered along the Italian coast Harmful Algae (IF 6.6) Pub Date : 2023-12-14 Stefano Accoroni, Monica Cangini, Roberto Angeletti, Carmen Losasso, Simone Bacchiocchi, Antonella Costa, Aurelia Di Taranto, Laura Escalera, Giorgio Fedrizzi, Angela Garzia, Francesca Longo, Andrea Macaluso, Nunzia Melchiorre, Anna Milandri, Stefania Milandri, Marina Montresor, Francesca Neri, Arianna Piersanti, Silva Rubini, Chiara Suraci, Adriana Zingone
Along the Italian coasts, toxins of algal origin in wild and cultivated shellfish have been reported since the 1970s. In this study, we used data gathered by the Veterinary Public Health Institutes (IZS) and the Italian Environmental Health Protection Agencies (ARPA) from 2006 to 2019 to investigate toxicity events along the Italian coasts and relate them to the distribution of potentially toxic species
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Toxic dinoflagellate Centrodinium punctatum (Cleve) F.J.R. Taylor: An examination on the responses in growth and toxin contents to drastic changes of temperature and salinity Harmful Algae (IF 6.6) Pub Date : 2023-12-12 Hyeon Ho Shin, Zhun Li, Damien Réveillon, Véronique Savar, Philipp Hess, Kenneth Neil Mertens, Joo Yeon Youn, Kyoungsoon Shin, Jihoon Lee, A-Young Shin, Eunjung Byun, Yeong Du Yoo, Moon Ho Son, Minji Lee, Min Ho Seo
To understand environmental effects affecting paralytic shellfish toxin production of Centrodinium punctatum, this study examined the growth responses, and toxin contents and profiles of a C. punctatum culture exposed to drastic changes of temperature (5-30 °C) and salinity (15–40). C. punctatum grew over a temperature range of 15–25 °C, with an optimum of 20 °C., and over a salinity range of 25–40
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Division time (td) for in situ growth measurements demonstrates thermal ecotypes of karlodinium veneficum Harmful Algae (IF 6.6) Pub Date : 2023-12-07 Erik L.J.E. Broemsen, Allen R. Place, Matthew W. Parrow
The toxic dinoflagellate Karlodinium veneficum forms fish killing blooms in temperate estuaries worldwide. These blooms have variable toxicity which may be related to bloom stage and in situ growth rates of the constituent K. veneficum cells. Measurement of in situ growth rates is challenging and methods such as the mitotic index technique require knowledge of the dynamics of cell division. In order
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Constructed wetland mesocosms improve the biodegradation of microcystin-LR and cylindrospermopsin by indigenous bacterial consortia Harmful Algae (IF 6.6) Pub Date : 2023-11-27 Lasse Ahrenkiel Thyssen, Alba Martinez i Quer, Carlos Alberto Arias, Lea Ellegaard-Jensen, Pedro N. Carvalho, Anders Johansen
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In situ diets of the bloom-forming dinoflagellate Noctiluca scintillans in Daya Bay Harmful Algae (IF 6.6) Pub Date : 2023-11-22 Jingfu Chen, Yu Zhong, Lei Wang, Dajun Qiu
Red Noctiluca scintillans is a common heterotrophic dinoflagellate that forms blooms in temperate, subtropical, and tropical coastal ecosystems. The diet of this species plays an important role in its cell growth, development, and reproduction. Because limited gene diversity data are available regarding prey of this species, its diet in Daya Bay during a boreal winter bloom is reported using an integrated
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Two duckweed species exhibit variable tolerance to microcystin-LR exposure across genotypic lineages Harmful Algae (IF 6.6) Pub Date : 2023-11-23 Lacey D. Rzodkiewicz, Martin M. Turcotte
Cyanotoxins produced by harmful cyanobacteria blooms can damage freshwater ecosystems and threaten human health. Floating macrophytes may be used as a means of biocontrol by limiting light and resources available to cyanobacteria. However, genetic variation in macrophyte sensitivity to cyanotoxins could influence their suitability as biocontrol agents. We investigated the influence of such intraspecific
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Human fatalities related to a Phaeocystis harmful algal bloom in the North Sea Harmful Algae (IF 6.6) Pub Date : 2023-11-19 Louis Peperzak, René van Wezel
On May 11, 2020, five surfers drowned after asphyxiation in a massive foam bank near the Dutch coast. We present a detailed account of the event and an examination of factors that govern local foam events, that are traditionally caused by Phaeocystis globosa (Prymnesiophyceae). The data support the hypothesis that the foam originated from a Phaeocystis bloom which if correct would make this accident
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Phytoplankton communities of the west coast of Florida – multiyear and seasonal responses to nutrient enrichment Harmful Algae (IF 6.6) Pub Date : 2023-11-19 E.R. Hall, L.K. Dixon, G.J. Kirkpatrick, A. Nissanka, B.A. Pederson
Blooms of the harmful algae species Karenia brevis are frequent off the southwest coast of Florida despite having relatively slow growth rates. The regional frequency of these harmful algal blooms led to the examination of the dominant estuarine outflows for effects on both K. brevis and the phytoplankton community in general. There is comparatively little information on the growth rates of non-Karenia
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Contribution of the satellitome to the exceptionally large genome of dinoflagellates: The case of the harmful alga Alexandrium minutum Harmful Algae (IF 6.6) Pub Date : 2023-11-22 Ángeles Cuadrado, Eugenia E. Montiel, Pablo Mora, Rosa I Figueroa, Pedro Lorite, Alfredo de Bustos
Dinoflagellates are known to possess an exceptionally large genome organized in permanently condensed chromosomes. Focusing on the contribution of satellite DNA (satDNA) to the whole DNA content of genomes and its potential role in the architecture of the chromosomes, we present the characterization of the satellitome of Alexandriun minutum strain VGO577. To achieve this, we analyzed Illumina reads
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Diversity and toxicity of the planktonic diatom genus Pseudo-nitzschia from coastal and offshore waters of the Southeast Pacific, including Pseudo-nitzschia dampieri sp. nov. Harmful Algae (IF 6.6) Pub Date : 2023-11-18 Peter von Dassow, Marta Mikhno, Isabella Percopo, Valentina Rubio Orellana, Víctor Aguilera, Gonzalo Álvarez, Michael Araya, Sebastián Cornejo-Guzmán, Tomás Llona, Jorge I. Mardones, Luis Norambuena, Victoria Salas-Rojas, Wiebe H.C.F. Kooistra, Marina Montresor, Diana Sarno
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Does prey availability influence the detection of Dinophysis spp. by the imaging FlowCytobot? Harmful Algae (IF 6.6) Pub Date : 2023-11-15 Emilie Houliez, Alexis D. Fischer, Brian D. Bill, Stephanie K. Moore
The Imaging FlowCytobot (IFCB) is a field-deployable imaging-in-flow cytometer that is increasingly being used to monitor harmful algae. The IFCB acquires images of suspended particles based on their chlorophyll-a fluorescence and/or the amount of light they scatter (side scattering). The present study hypothesized that fluorescence-based image acquisition would undercount Dinophysis spp., a genus
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Concentration of total microcystins associates with nitrate and nitrite, and may disrupt the nitrogen cycle, in warm-monomictic lakes of the southcentral United States Harmful Algae (IF 6.6) Pub Date : 2023-11-08 Crista M. Kieley, Daniel L. Roelke, Royoung Park, Kathryn L. Campbell, N. Hagen Klobusnik, Jordan R. Walker, Sierra E. Cagle, Marissa L. Kneer, Kevin M. Stroski, Bryan W. Brooks, Jessica M. Labonté
Cyanobacterial blooms and the toxins they produce pose a growing threat worldwide. Mitigation of such events has primarily focused on phosphorus management and has largely neglected the role of nitrogen. Previous bloom research and proposed management strategies have primarily focused on temperate, dimictic lakes, and less on warm-monomictic systems like those at subtropical latitudes. The in-lake
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Diversity and distribution of benthic dinoflagellates in Tonga include the potentially harmful genera Gambierdiscus and Fukuyoa Harmful Algae (IF 6.6) Pub Date : 2023-11-04 Phoebe A. Argyle, Lesley L. Rhodes, Kirsty F. Smith, D.Tim Harwood, Tuikolongahau Halafihi, Islay D. Marsden
Benthic dinoflagellates that can cause illness, such as ciguatera poisoning (CP), are prevalent around the Pacific but are poorly described in many locations. This study represents the first ecological assessment of benthic harmful algae species in the Kingdom of Tonga, a country where CP occurs regularly. Surveys were conducted in June 2016 in the Tongatapu island group, and in June 2017 across three
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Symptom frequency and exposure to a cyanobacteria bloom in Florida Harmful Algae (IF 6.6) Pub Date : 2023-10-17 John S. Reif, Nicole Stockley, Kathi Harvey, Malcolm McFarland, Shirley C. Gordon, Adam M. Schaefer
This investigation was undertaken to characterize health effects associated with a major bloom of blue-green algae due to the proliferation Microcystis aeruginosa that occurred in Florida in 2018. Cyanobacteria produce multiple toxins, including the potent hepatotoxic microcystins (MCs), that have been reported to cause illness in exposed persons worldwide. Widespread exposure to toxins released by
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Variation in intracellular polyphosphate and associated gene expression in response to different phosphorus conditions in the dinoflagellate Karenia mikimotoi Harmful Algae (IF 6.6) Pub Date : 2023-10-22 Wen-Yu Jin, Xiang-Wu Chen, Jin-Zhou Tan, Xin Lin, Lin-Jian Ou
Polyphosphate (polyP) has long been recognized as a crucial intracellular reservoir for phosphorus in microorganisms. However, the dynamics of polyP and its regulatory mechanism in eukaryotic phytoplankton in response to variations in external phosphorus conditions remain poorly understood. A comprehensive investigation was conducted to examine the intracellular polyP-associated metabolic response
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Microcystin aids in cold temperature acclimation: Differences between a toxic Microcystis wildtype and non-toxic mutant Harmful Algae (IF 6.6) Pub Date : 2023-10-22 Gwendolyn F. Stark, Robbie M. Martin, Laura E. Smith, Bofan Wei, Ferdi L. Hellweger, George S. Bullerjahn, R.Michael L. McKay, Gregory L. Boyer, Steven W. Wilhelm
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Metabolomics and lipidomics reveal the effects of the toxic dinoflagellate Alexandrium catenella on immune cells of the blue mussel, Mytilus edulis Harmful Algae (IF 6.6) Pub Date : 2023-10-20 Stéphane Beauclercq, Olivier Grenier, Alexandre A. Arnold, Dror E. Warschawski, Gary H. Wikfors, Bertrand Genard, Réjean Tremblay, Isabelle Marcotte
The increasing occurrence of harmful algal blooms, mostly of the dinoflagellate Alexandrium catenella in Canada, profoundly disrupts mussel aquaculture. These filter-feeding shellfish feed on A. catenella and accumulate paralytic shellfish toxins, such as saxitoxin, in tissues, making them unsafe for human consumption. Algal toxins also have detrimental effects upon several physiological functions
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Domoic acid in Canadian Pacific waters, from 2016 to 2021, and relationships with physical and chemical conditions Harmful Algae (IF 6.6) Pub Date : 2023-10-20 R. Ian Perry, Nina Nemcek, Melissa Hennekes, Akash Sastri, Andrew R.S. Ross, Hayleigh Shannon, Ryan B. Shartau
Domoic acid, a phycotoxin produced by species of the marine diatom Pseudo-nitzschia, can cause deleterious impacts to marine food webs and human health. Domoic acid and Pseudo-nitzschia spp. were surveyed from 2016 to 2021 in the Pacific waters of Canada to assess their occurrences, concentrations, and relationships with physical and chemical conditions. Domoic acid was common, occurring in measurable
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Seasonal occurrence of toxic phytoplankton and phycotoxins at a mussel aquaculture site in Nova Scotia, Canada Harmful Algae (IF 6.6) Pub Date : 2023-10-17 Nancy I. Lewis, Rencheng Yu, Cheryl Rafuse, Michael A. Quilliam
A three-year field study at a mussel (Mytilus edulis) aquaculture site in Ship Harbour, Nova Scotia, Canada was carried out between 2004 and 2006 to detect toxic phytoplankton species and dissolved lipophilic phycotoxins and domoic acid. A combination of plankton monitoring and solid phase adsorption toxin tracking (SPATT) techniques were used. Net tow and pipe phytoplankton samples were taken weekly
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Isopropylthiol emission by bloom-forming Microcystis: Biochemistry, ecophysiology and semiochemistry of a volatile organosulfur compound Harmful Algae (IF 6.6) Pub Date : 2023-10-16 Susan B. Watson, Friedrich Jüttner
Microcystis species not only produce toxic cyanobacterial blooms, but can be a significant source of taste and odour. Previous studies have associated foul-smelling volatile organic sulfur compounds (VOSCs) with Microcystis blooms, but have largely attributed these compounds to bacterial bloom decomposition. However, earlier reports of the production of isopropylthio compounds by several Microcystis
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Where does floating Sargassum in the East China Sea come from? Harmful Algae (IF 6.6) Pub Date : 2023-10-10 Lin Qi, Peng Cheng, Menghua Wang, Chuanmin Hu, Yuyuan Xie, Keyu Mao
Floating macroalgae of Sargassum horneri (S. horneri) in the East China Sea (ECS) has increased in recent years, with ocean warming being one of the driving factors. Yet their possible origins, based on a literature review, are unclear. Here, using multi-sensor high-resolution remote sensing data and numerical experiments for the period of 2015–2023, we show two possible origins of the ECS floating
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Ciguatera poisoning in French Polynesia: A review of the distribution and toxicity of Gambierdiscus spp., and related impacts on food web components and human health Harmful Algae (IF 6.6) Pub Date : 2023-10-12 M. Chinain, C. Gatti Howell, M. Roué, A. Ung, K. Henry, T. Revel, P. Cruchet, J. Viallon, H.T. Darius
Ciguatera Poisoning (CP) is a seafood poisoning highly prevalent in French Polynesia. This illness results from the consumption of seafood contaminated with ciguatoxins (CTXs) produced by Gambierdiscus, a benthic dinoflagellate. Ciguatera significantly degrades the health and economic well-being of local communities largely dependent on reef fisheries for their subsistence. French Polynesia has been
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Novel insights into toxin changes associated with the growth of Alexandrium pacificum: Revealing active toxin-secretion ability and toxin cell quota variation Harmful Algae (IF 6.6) Pub Date : 2023-10-05 Weijia Song, Xiuxian Song, Lianbao Chi, Jianan Zhu, Xihua Cao, Zhiming Yu
Paralytic shellfish toxins (PSTs) are widely distributed globally and are produced by Alexandrium pacificum in marine system. However, the characteristics of toxins producing and secreting associated with growth phases are still unclear, especially whether A. pacificum has the ability to actively secrete PSTs is controversial. In this study, variation characteristics of intracellular and extracellular
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In hot water: Interactions of temperature, nitrogen form and availability and photosynthetic and nitrogen uptake responses in natural Karenia brevis populations Harmful Algae (IF 6.6) Pub Date : 2023-10-08 So Hyun Ahn, Patricia M. Glibert, Cynthia A. Heil
During 2020–2021, an unusually prolonged bloom of the toxigenic dinoflagellate Karenia brevis persisted for more than 12 months along the Gulf coast of Florida, resulting in severe environmental effects. Motivated by the possibility that unusual nutrient conditions existed during summer 2021, the short-term interactions of temperature, nitrogen (N) forms (ammonium (NH4+), nitrate (NO3−), and urea)
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What happens in the shadows - Influence of seasonal and non-seasonal dynamics on domoic acid monitoring in the Monterey Bay upwelling shadow Harmful Algae (IF 6.6) Pub Date : 2023-10-07 Aubrey Trapp, Kendra Hayashi, Jerome Fiechter, Raphael M. Kudela
Domoic acid produced by toxigenic Pseudo-nitzschia species is the main toxin threat from harmful algal blooms in Monterey Bay and the larger California Current region on the West Coast of the United States. Toxin monitoring in Monterey Bay includes a long-running time series of weekly measurements of domoic acid from water samples, sentinel mussels, and solid phase adsorption toxin tracking (SPATT)
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Emerging phylogeographic perspective on the toxigenic diatom genus Pseudo-nitzschia in coastal northern European waters and gateways to eastern Arctic seas: Causes, ecological consequences and socio-economic impacts Harmful Algae (IF 6.6) Pub Date : 2023-10-07 Allan Cembella, Kerstin Klemm, Uwe John, Bengt Karlson, Lars Arneborg, Dave Clarke, Tsuyuko Yamanaka, Caroline Cusack, Lars Naustvoll, Eileen Bresnan, Luka Šupraha, Nina Lundholm
The diatom Pseudo-nitzschia H. Peragallo is perhaps the most intensively researched genus of marine pennate diatoms, with respect to species diversity, life history strategies, toxigenicity, and biogeographical distribution. The global magnitude and consequences of harmful algal blooms (HABs) of Pseudo-nitzschia are particularly significant because of the high socioeconomic impacts and environmental