Editorial Board
Publication date: July 2019Source: Harmful Algae, Volume 87Author(s): (Source: Harmful Algae)
Source: Harmful Algae - July 25, 2019 Category: Environmental Health Source Type: research
Transcriptome sequencing of a toxic dinoflagellate, Karenia mikimotoi subjected to stress from solar ultraviolet radiation
In conclusion, the present study suggests that the toxic dinoflagellate K. mikimotoi has limited transcriptomic regulation but confirms that it appears as a tolerant species in response to solar UVR. These findings expand current knowledge of gene expression in HAB-forming species in response to natural environment factors such as solar radiation. (Source: Harmful Algae)
Source: Harmful Algae - July 25, 2019 Category: Environmental Health Source Type: research
Demonstrated transfer of cyanobacteria and cyanotoxins along a freshwater-marine continuum in France
In this study we evaluated the transfer of cyanobacteria and cyanotoxins along a river continuum from a freshwater reservoir through an interconnecting estuary to the coastal area in Brittany, France. We sampled regularly over 2 years at 5 stations along the river continuum and analysed for phytoplankton and cyanotoxins, together with physico-chemical parameters. Results show that cyanobacteria dominated the phytoplanktonic community with high densities (up to 2 × 106 cells mL−1) at the freshwater sites during the summer and autumn periods of both years, with a cell transfer to estuarine (up to 105 cells mL−1) and...
Source: Harmful Algae - July 13, 2019 Category: Environmental Health Source Type: research
Phylogenetic analysis and yessotoxin profiles of Gonyaulax spinifera cultures from the Benguela Current upwelling system
Publication date: Available online 9 July 2019Source: Harmful AlgaeAuthor(s): Chibo Chikwililwa, Pearse McCarron, Joanna J. Waniek, Detlef E. Schulz-BullAbstractThe Benguela Current in the Atlantic is one of the four major upwelling systems on the Eastern boundary of the world ocean. Thus the coastal regions off Namibia are prone to high primary productivity that can lead to Harmful Algae Blooms as this nutrient rich water reaches the euphotic zone. Yessotoxins (YTXs) produced by G. spinifera were detected in Namibian phytoplankton field samples in 2011. Isolation of G. spinifera cultures from this location in 2012 enabled...
Source: Harmful Algae - July 10, 2019 Category: Environmental Health Source Type: research
Effective aerial monitoring of cyanobacterial harmful algal blooms is dependent on understanding cellular migration
Publication date: July 2019Source: Harmful Algae, Volume 87Author(s): Mingzhi Qu, Stephen Anderson, Pin Lyu, Yasir Malang, Jizhou Lai, Jianye Liu, Bin Jiang, Feng Xie, Hugh H.T. Liu, Daniel D. Lefebvre, Yuxiang S. WangAbstractCyanobacterial harmful algal blooms (CHABs) degrade water quality and may produce toxins. The distribution of CHABs can change rapidly due to variations in population dynamics and environmental conditions. Biological and ecological aspects of CHABs were studied in order to better understand CHABs dynamics. Field experiments were conducted near Hartington, Ontario, Canada in ponds dominated by Microcys...
Source: Harmful Algae - July 6, 2019 Category: Environmental Health Source Type: research
Variability and profiles of lipophilic toxins in bivalves from Great Britain during five and a half years of monitoring: azaspiracids and yessotoxins
Publication date: July 2019Source: Harmful Algae, Volume 87Author(s): Monika Dhanji-Rapkova, Alison O’Neill, Benjamin H. Maskrey, Lewis Coates, Sarah C. Swan, Mickael Teixeira Alves, Rebecca J. Kelly, Robert G. Hatfield, Stephanie J. Rowland-Pilgrim, Adam M. Lewis, Andrew D. TurnerAbstractCefas has been responsible for the delivery of official control biotoxin testing of bivalve molluscs from Great Britain for just over a decade. Liquid chromatography tandem mass spectrometric (LC–MS/MS) methodology has been used for the quantitation of lipophilic toxins (LTs) since 2011. The temporal and spatial distribution of okadai...
Source: Harmful Algae - July 3, 2019 Category: Environmental Health Source Type: research
Benthic dinoflagellates: Testing the reliability of the artificial substrate method in the Macaronesian region
Publication date: July 2019Source: Harmful Algae, Volume 87Author(s): Juan Fernández-Zabala, Fernando Tuya, Ana Amorim, Emilio Soler-OnísAbstractThe suitability of the ‘artificial substrate’ method, i.e. standardized surfaces of fiberglass screens, for the quantification of four benthic harmful algal bloom (BHAB) dinoflagellates (Gambierdiscus, Ostreopsis, Prorocentrum and Coolia) was tested relative to estimates from natural macroalgal substrates. Sampling took place in a variety of intertidal and subtidal coastal habitats under different water motion conditions, at depths from 1 to 7 m, in two archipelagos of the...
Source: Harmful Algae - June 29, 2019 Category: Environmental Health Source Type: research
Cyanobacterial bioactive metabolites—A review of their chemistry and biology
Publication date: Available online 27 June 2019Source: Harmful AlgaeAuthor(s): I-Shuo Huang, Paul V. ZimbaAbstractCyanobacterial blooms occur when algal densities exceed baseline population concentrations. Cyanobacteria can produce a large number of secondary metabolites. Odorous metabolites affect the smell and flavor of aquatic animals, whereas bioactive metabolites cause a range of lethal and sub-lethal effects in plants, invertebrates, and vertebrates, including humans. Herein, the bioactivity, chemistry, origin, and biosynthesis of these cyanobacterial secondary metabolites were reviewed. With recent revision of cyano...
Source: Harmful Algae - June 28, 2019 Category: Environmental Health Source Type: research
Distributions of three Alexandrium species and their toxins across a salinity gradient suggest an increasing impact of GDA producing A. pseudogonyaulax in shallow brackish waters of Northern Europe
Publication date: July 2019Source: Harmful Algae, Volume 87Author(s): Anke Kremp, Per Juel Hansen, Urban Tillmann, Henna Savela, Sanna Suikkanen, Daniela Voß, Facundo Barrera, Hans Henrik Jakobsen, Bernd KrockAbstractBlooms of Alexandrium spp. are a well-known phenomenon in Northern European waters. While A. tamarense/catenella, and A. pseudogonyaulax have been reported from marine waters, high densities of A. ostenfeldii are mainly observed at lower salinities in North Sea estuaries and the Baltic Sea, suggesting salinity as a driver of Alexandrium species composition and toxin distribution. To investigate this relations...
Source: Harmful Algae - June 28, 2019 Category: Environmental Health Source Type: research
Erratum to Cyanobacterial bioactive metabolites—A review of their chemistry and biology [Harmful Algae 83 (2019) 42-94]
Publication date: Available online 26 June 2019Source: Harmful AlgaeAuthor(s): (Source: Harmful Algae)
Source: Harmful Algae - June 27, 2019 Category: Environmental Health Source Type: research
In-situ fluorescence monitoring of cyanobacteria: Laboratory-based quantification of species-specific measurement accuracy
This study has provided important new information on the strengths and limitations of fluorescence sensors. The sensor readings can provide accurate biovolume quantification and species determination for a number of bloom-forming species when sensors are properly compensated and calibrated. (Source: Harmful Algae)
Source: Harmful Algae - June 27, 2019 Category: Environmental Health Source Type: research
Estimating the economic costs of algal blooms in the Canadian Lake Erie Basin
This study values these costs for the Canadian portion of the Lake Erie basin economy using standard economic approaches that are widely applied within the world of cost-benefit analysis. The results suggest that algal blooms will impose equivalent annual costs equal to $272 million in 2015 prices over a 30-year period if left unchecked. The largest market costs will be imposed on the tourism industry ($110 million in equivalent annual costs) and the largest non-market costs will be borne by recreational users and those who place inherent value on the lake’s quality ($115 million in equivalent annual costs). Management a...
Source: Harmful Algae - June 24, 2019 Category: Environmental Health Source Type: research
Detection, characterization and expression dynamics of histone proteins in the dinoflagellate Alexandrium pacificum during growth regulation
In this study, we investigated the presence of histone proteins and their functions in the dinoflagellate, Alexandrium pacificum. Histone protein sequences were analyzed, focusing on phylogenetic analysis and histone code. Histone expression was analyzed during the cell cycle and under nutritionally enhanced conditions using quantitative-PCR and western blots. Acid-soluble proteins were subjected to mass spectrometry analysis. To our knowledge, this is the first report of immunological detection of histone proteins (H2B and H4) in any dinoflagellate species. Absolute quantification of histone transcript in activily dividin...
Source: Harmful Algae - June 21, 2019 Category: Environmental Health Source Type: research
Harmful algae at the complex nexus of eutrophication and climate change
Publication date: Available online 20 June 2019Source: Harmful AlgaeAuthor(s): Patricia M. GlibertAbstractClimate projections suggest–with substantial certainty–that global warming>1.5 °C will occur by mid-century (2050). Population is also projected to increase, amplifying the demands for food, fuel, water and sanitation, which, in turn, escalate nutrient pollution. Global projections of nutrient pollution, however, are less certain than those of climate as there are regionally decreasing trends projected in Europe, and stabilization of nutrient use in North America and Australia. In this review of the effects of eut...
Source: Harmful Algae - June 21, 2019 Category: Environmental Health Source Type: research
Environmental drivers of unprecedented Alexandrium catenella dinoflagellate blooms off eastern Tasmania, 2012–2018
Publication date: July 2019Source: Harmful Algae, Volume 87Author(s): Scott A. Condie, Eric C.J. Oliver, Gustaaf M. HallegraeffAbstractBlooms of the highly toxic dinoflagellate Alexandrium catenella (previously referred to as tamarense group 1) were first detected off eastern Tasmania in 2012 and have since been responsible for incidences of human paralytic shellfish poisoning and extended closures (up to 25 weeks) of mussel, oyster, scallop, abalone and rock lobster industries (up to 150 mg/kg PST in mussels). Investigation of meteorological and oceanographic influences indicate that the annually recurrent winter-spring...
Source: Harmful Algae - June 21, 2019 Category: Environmental Health Source Type: research
