Over 30 years of HABs in the Philippines and Malaysia: What have we learned?
Publication date: Available online 2 March 2020Source: Harmful AlgaeAuthor(s): Aletta T. Yñiguez, Po Teen Lim, Chui Pin Leaw, Steffiana J. Jipanin, Mitsunori Iwataki, Garry Benico, Rhodora V. Azanza (Source: Harmful Algae)
Source: Harmful Algae - March 2, 2020 Category: Environmental Health Source Type: research
An anomalous bi-macroalgal bloom caused by Ulva and Sargassum seaweeds during spring to summer of 2017 in the western Yellow Sea, China
Publication date: March 2020Source: Harmful Algae, Volume 93Author(s): Jie Xiao, Zongling Wang, Hongjun Song, Shiliang Fan, Chao Yuan, Mingzhu Fu, Xiaoxiang Miao, Xuelei Zhang, Rongguo Su, Chuanmin Hu (Source: Harmful Algae)
Source: Harmful Algae - March 1, 2020 Category: Environmental Health Source Type: research
Ecological time series and integrative taxonomy unveil seasonality and diversity of the toxic diatom Pseudo-nitzschia H. Peragallo in the northern Adriatic Sea
Publication date: March 2020Source: Harmful Algae, Volume 93Author(s): Timotej Turk Dermastia, Federica Cerino, David Stanković, Janja Francé, Andreja Ramšak, Magda Žnidarič Tušek, Alfred Beran, Vanessa Natali, Marina Cabrini, Patricija Mozetič (Source: Harmful Algae)
Source: Harmful Algae - February 28, 2020 Category: Environmental Health Source Type: research
Editorial Board
Publication date: February 2020Source: Harmful Algae, Volume 92Author(s): (Source: Harmful Algae)
Source: Harmful Algae - February 27, 2020 Category: Environmental Health Source Type: research
A strain of the toxic dinoflagellate Karlodinium veneficum isolated from the East China Sea is an omnivorous phagotroph
Publication date: March 2020Source: Harmful Algae, Volume 93Author(s): Huijiao Yang, Zhangxi Hu, Lixia Shang, Yunyan Deng, Ying Zhong Tang (Source: Harmful Algae)
Source: Harmful Algae - February 26, 2020 Category: Environmental Health Source Type: research
Fatty acid ester metabolites of gymnodimine in shellfish collected from China and in mussels (Mytilus galloprovincialis) exposed to Karenia selliformis
Publication date: February 2020Source: Harmful Algae, Volume 92Author(s): Ying Ji, Yijia Che, Elliott J. Wright, Pearse McCarron, Philipp Hess, Aifeng LiAbstractMarine shellfish exposed to the microalgae Karenia selliformis can accumulate gymnodimines (GYM). Shellfish samples collected from Beihai City in Guangxi Autonomous Region, and Ningde City in Fujian Province, in the South China Sea, as well as mussels Mytilus galloprovincialis fed on K. selliformis under laboratory conditions were analyzed. Gymnodimines and various fatty acid ester metabolites were detected in the clam Antigona lamellaris and pen shell Atrina pecti...
Source: Harmful Algae - February 21, 2020 Category: Environmental Health Source Type: research
A large-scale sustained fish kill in the St. Johns River, Florida: A complex consequence of cyanobacteria blooms
Publication date: February 2020Source: Harmful Algae, Volume 92Author(s): Jan H. Landsberg, John Hendrickson, Maki Tabuchi, Yasunari Kiryu, B. James Williams, Michelle C. TomlinsonAbstractIn the summer of 2010, a sustained multispecies fish kill, affecting primarily adult red drum (Sciaenops ocellatus) and Atlantic stingray (Dasyatis sabina), along with various baitfish such as menhaden (Brevoortia spp.) and shad (Dorosoma spp.), was documented for six weeks along 50 km of the Lower St. Johns River (LSJR), Florida. An Aphanizomenon flos-aquae bloom was present in the freshwater reaches before the fish kill. The kill was tr...
Source: Harmful Algae - February 15, 2020 Category: Environmental Health Source Type: research
Metabarcoding analysis of harmful algal species in Jiaozhou Bay
Publication date: February 2020Source: Harmful Algae, Volume 92Author(s): Shuya Liu, Kate Gibson, Zongmei Cui, Yang Chen, Xiaoxia Sun, Nansheng ChenAbstractAccurate detection of the composition and dynamics of harmful algal bloom (HAB) species is critical for studying the mechanisms of HAB formation and for developing means for predicting the occurrences of HABs. Jiaozhou Bay is an epitome of China’s coastal ecosystem and an ideal site for HAB research with the accumulation of decades of historical investigation records. Nevertheless, most of these earlier studies on phytoplankton communities applied primarily morphology...
Source: Harmful Algae - February 15, 2020 Category: Environmental Health Source Type: research
The toxic dinoflagellate Alexandrium minutum impairs the performance of oyster embryos and larvae
Publication date: February 2020Source: Harmful Algae, Volume 92Author(s): Justine Castrec, Hélène Hégaret, Matthias Huber, Jacqueline Le Grand, Arnaud Huvet, Kevin Tallec, Myrina Boulais, Philippe Soudant, Caroline FabiouxAbstractThe dinoflagellate genus Alexandrium comprises species that produce highly potent neurotoxins known as paralytic shellfish toxins (PST), and bioactive extracellular compounds (BEC) of unknown structure and ecological significance. The toxic bloom-forming species, Alexandrium minutum, is distributed worldwide and adversely affects many bivalves including the commercially and ecologically importa...
Source: Harmful Algae - February 15, 2020 Category: Environmental Health Source Type: research
Editorial Board
Publication date: January 2020Source: Harmful Algae, Volume 91Author(s): (Source: Harmful Algae)
Source: Harmful Algae - February 12, 2020 Category: Environmental Health Source Type: research
Utilization of various forms of nitrogen and expression regulation of transporters in the harmful alga Heterosigma akashiwo (Raphidophyceae)
In this study, the utilization of three different chemical forms of N (nitrate, ammonium, and urea) by H. akashiwo CCMA 369 was investigated in batch culture conditions. Results showed that H. akashiwo grew well on all three N compounds, and the highest cell yield occurred in the NH4+ culture group. Reverse transcription quantitative PCR analysis revealed that the expression of high-affinity NO3− transporter (NIT), NH4+ transporter (AMT) and high-affinity urea active transporter (DUR3), were significantly up-regulated under N-limitation compared to the N-replete control. The mRNA levels of AMT and DUR3 also displayed a c...
Source: Harmful Algae - February 12, 2020 Category: Environmental Health Source Type: research
Calcium promotes formation of large colonies of the cyanobacterium Microcystis by enhancing cell-adhesion
In this study, a 72-day cultivation experiment was conducted to determine the long-term effects of Ca2+ on Microcystis colony formation. Laboratory results indicate that Ca2+ causes Microcystis to rapidly aggregate and form a colony through cell adhesion, then colony formation by cell-adhesion lost dominance, owing to the decrease in Ca2+ concentrations caused by precipitation/complexation. Although the initial colony morphology by cell adhesion is sparse, the newly divided cells, without separating from the mother cells, constantly fill the gaps in the original colony at Ca2+ concentrations>40 mg L−1 for a long time, wh...
Source: Harmful Algae - February 6, 2020 Category: Environmental Health Source Type: research
Exposure to microcystin among coastal residents during a cyanobacteria bloom in Florida
This study investigated potential exposure to the cyanobacterial toxin, MC by measuring concentrations in swabs of the nasal mucosa. In addition, the relationships between nasal concentrations of MC, environmental concentrations and activity patterns were assessed. Participants (n = 125) were recruited in 2018 during a cyanobacterial bloom of Microcystis aeruginosa and completed a questionnaire which included location, type, and duration of recreational or occupational contact with impacted waterways within the last 10 days. Water samples were collected concurrently. A sterile swab was used to collect a sample from the nas...
Source: Harmful Algae - February 6, 2020 Category: Environmental Health Source Type: research
Impacts of antibiotic contaminants on Microcystis aeruginosa during potassium permanganate treatment
This study assessed the treatment performance of KMnO4 in Microcystis aeruginosa with and without the existence of the antibiotic mixture composed of four simultaneously detected antibiotics in aquatic environments (sulfamethoxazole, ciprofloxacin, amoxicillin and tetracycline). KMnO4 downregulated two chlorophyll a synthetases (chlG and chlM), 14 photosynthesis-related proteins and two microcystin synthetases (mcyB and mcyD) in M. aeruginosa, and reduced chlorophyll a content, photosynthetic activity and microcystin concentration in a dose-dependent manner. Inhibition of photosynthesis and biosynthesis resulted in extende...
Source: Harmful Algae - January 28, 2020 Category: Environmental Health Source Type: research
The relationship between toxic phytoplankton species occurrence and environmental and meteorological factors along the Eastern Adriatic coast
In this study, the time series of toxic phytoplankton species collected between 2004 and 2018 from the Northern Adriatic, Šibenik Bay, and Mali Ston Bay was analyzed in relation to environmental (temperature, salinity, water column stability, and river flow) and meteorological parameters (precipitation and wind). Because of the mostly non-linear relation between biotic and abiotic parameters, self-organizing maps (SOM) were used to identify these relationships.SOM analysis distinguished species of the genus Dinophysis from Gonyaulax spinifera and Lingulodinium polyedrum species, which better tolerate wind-induced disturba...
Source: Harmful Algae - January 25, 2020 Category: Environmental Health Source Type: research
