Toxic HAB species from the Sea of Okhotsk detected by a metagenetic approach, seasonality and environmental drivers
In this study, the presence of toxic HAB species in the Sea of Okhotsk was investigated based on metagenetic data collected during 6 years of weekly monitoring. Operational taxonomic units (OTUs) associated with the toxic HAB species were detected based on amplifying 18S V7-V9 and 28S D1 rRNA gene regions. In total, 43 unique OTUs associated with toxic HAB species were revealed, with 26 of those previously not reported from the Sea of Okhotsk. More OTUs belonging to dinoflagellates were detected by 18S, whereas a similar number of OTUs associated with dinoflagellates and diatoms were detected by targeting the 28S region. S...
Source: Harmful Algae - June 18, 2019 Category: Environmental Health Source Type: research
Variability of Amnesic Shellfish Toxin and Pseudo-nitzschia occurrence in bivalve molluscs and water samples–Analysis of ten years of the official control monitoring programme
Publication date: July 2019Source: Harmful Algae, Volume 87Author(s): Stephanie Rowland-Pilgrim, Sarah C. Swan, Alison O’Neill, Sarah Johnson, Lewis Coates, Patrycja Stubbs, Karl Dean, Rachel Parks, Keith Harrison, Mickael Teixeira Alves, Alison Walton, Keith Davidson, Andrew D. Turner, Benjamin H. MaskreyAbstractAs the official control laboratory for marine biotoxins within Great Britain, the Centre for Environment, Fisheries and Aquaculture Science, in conjunction with the Scottish Association for Marine Science, has amassed a decade’s worth of data regarding the prevalence of the toxins associated with Amnesic Shell...
Source: Harmful Algae - June 12, 2019 Category: Environmental Health Source Type: research
Environmental factors associated with toxic cyanobacterial blooms across 20 drinking water reservoirs in a semi-arid region of Brazil
Publication date: June 2019Source: Harmful Algae, Volume 86Author(s): Mário U.G. Barros, Alan E. Wilson, João I.R. Leitão, Silvano P. Pereira, Riley P. Buley, Edna G. Fernandez-Figueroa, José Capelo-NetoAbstractCyanobacteria are known to produce a wide variety of bioactive, toxic secondary metabolites generally described as hepatotoxins, neurotoxins, cytotoxins, or dermatoxins. In Brazil, the regular monitoring of cyanobacterial toxins has intensified after the death of 65 patients in a hemodialysis clinic in Caruaru in the state of Pernambuco due to microcystin exposure. The primary objective of this study was to use ...
Source: Harmful Algae - June 9, 2019 Category: Environmental Health Source Type: research
Progress and promise of omics for predicting the impacts of climate change on harmful algal blooms
Publication date: Available online 8 June 2019Source: Harmful AlgaeAuthor(s): Gwenn M.M. Hennon, Sonya T. DyhrmanAbstractClimate change is predicted to increase the severity and prevalence of harmful algal blooms (HABs). In the past twenty years, omics techniques such as genomics, transcriptomics, proteomics and metabolomics have transformed that data landscape of many fields including the study of HABs. Advances in technology have facilitated the creation of many publicly available omics datasets that are complementary and shed new light on the mechanisms of HAB formation and toxin production. Genomics have been used to r...
Source: Harmful Algae - June 9, 2019 Category: Environmental Health Source Type: research
Effects of ocean acidification and phosphate limitation on physiology and toxicity of the dinoflagellate Karenia mikimotoi
Publication date: July 2019Source: Harmful Algae, Volume 87Author(s): Hong Wang, Xiaoqin Niu, Xinqian Feng, Rodrigo J. Gonçalves, Wanchun GuanAbstractThis work demonstrated a 10-day batch culture experiment to test the physiology and toxicity of harmful dinoflagellate Karenia mikimotoi in response to ocean acidification (OA) under two different phosphate concentrations. Cells were previously acclimated in OA (pH = 7.8 and CO2 = 1100 μatm) condition for about three months before testing the responses of K. mikimotoi cells to a two-factorial combinations experimentation. This work measured the variation in physiolo...
Source: Harmful Algae - June 6, 2019 Category: Environmental Health Source Type: research
