Editorial Board
Publication date: November 2019Source: Harmful Algae, Volume 89Author(s): (Source: Harmful Algae)
Source: Harmful Algae - October 29, 2019 Category: Environmental Health Source Type: research
Cyanobacterial blooms modify food web structure and interactions in western Lake Erie
Publication date: Available online 16 October 2019Source: Harmful AlgaeAuthor(s): Ruth D. Briland, Joshua P. Stone, Manjunath Manubolu, Jiyoung Lee, Stuart A. LudsinAbstractWith anthropogenic eutrophication and climate change causing an increase in cyanobacterial blooms worldwide, the need to understand the consequences of these blooms on aquatic ecosystems is paramount. Key questions remain unanswered with respect to how cyanobacteria blooms affect the structure of aquatic food webs, the foraging abilities of higher consumers, and the potential for cyanotoxins (e.g., microcystins [MCs]) to accumulate in fish. Toward addre...
Source: Harmful Algae - October 18, 2019 Category: Environmental Health Source Type: research
Spatial-temporal distribution of Aureoumbra lagunensis (“brown tide”) in Baffin Bay, Texas
Publication date: November 2019Source: Harmful Algae, Volume 89Author(s): Emily K. Cira, Michael S. WetzAbstractOnce limited to the Laguna Madre of Texas, blooms of the brown tide organism, Aureoumbra lagunensis, have recently been reported elsewhere. Previous studies have focused on the role of extreme hypersalinity and lack of grazing pressure as facilitators of brown tide blooms. However, development of blooms in systems that are not experiencing extreme hypersalinity, and also that are undergoing eutrophication, suggests that our understanding of A. lagunensis bloom dynamics requires additional refinement. The goal of ...
Source: Harmful Algae - October 18, 2019 Category: Environmental Health Source Type: research
Effects of increasing temperature and acidification on the growth and competitive success of Alexandrium catenella from the Gulf of Maine
Publication date: November 2019Source: Harmful Algae, Volume 89Author(s): Drajad S. Seto, Lee Karp-Boss, Mark L. WellsAbstractClimate driven increases in ocean temperature and pCO2 have the potential to alter the growth and prevalence of future Harmful Algal Blooms (HABs), but systematic studies on how climate drivers influence toxic algal species relative to non-toxic phytoplankton are lacking. In particular, little is known about how future climate scenarios will affect the growth of the toxic dinoflagellate Alexandrium catenella, which is responsible for the paralytic shellfish poisoning (PSP) events that threaten the h...
Source: Harmful Algae - October 18, 2019 Category: Environmental Health Source Type: research
Development and evaluation of a sensitive, Diffusive Gradients in Thin-Films (DGT) method for determining microcystin-LR concentrations in freshwater and seawater
Publication date: November 2019Source: Harmful Algae, Volume 89Author(s): Elisa D’AngeloAbstractA Diffusive Gradients in Thin-Films (DGT) passive sampling technique was developed for microcystin-LR (MC-LR), one of the most common and toxic microcystins. Three types of resins (HP20, SP700, and XAD18) were evaluated for MC-LR uptake kinetics, capacities, and extraction efficiencies and simple procedures were developed for determining MC-LR concentration in binding disc extracts by Adda-ELISA (U.S. EPA Method 546). The XAD18-DGT/Adda-ELISA method had a 7-d deployment time detection limit of ≈0.05 μg/L and capacity of>2...
Source: Harmful Algae - October 16, 2019 Category: Environmental Health Source Type: research
Role of potentially toxic cyanobacteria in crustacean zooplankton diet in a eutrophic lake
Publication date: November 2019Source: Harmful Algae, Volume 89Author(s): Helen Agasild, Kristel Panksep, Ilmar Tõnno, Kätlin Blank, Toomas Kõiv, René Freiberg, Reet Laugaste, Roger I. Jones, Peeter Nõges, Tiina NõgesAbstractThe coexistence of potentially toxic bloom-forming cyanobacteria (CY) and generally smaller-sized grazer communities has raised the question of zooplankton (ZP) ability to control harmful cyanobacterial blooms and highlighted the need for species-specific research on ZP-CY trophic interactions in naturally occurring communities. A combination of HPLC, molecular and stable isotope analyses was use...
Source: Harmful Algae - October 16, 2019 Category: Environmental Health Source Type: research
Basin-specific changes in filamentous cyanobacteria community composition across four decades in the Baltic Sea
Publication date: Available online 11 October 2019Source: Harmful AlgaeAuthor(s): Malin Olofsson, Sanna Suikkanen, Justyna Kobos, Norbert Wasmund, Bengt KarlsonAbstractAlmost every summer, dense blooms of filamentous cyanobacteria are formed in the Baltic Sea. These blooms may cause problems for tourism and ecosystem services, where surface accumulations and beach fouling are commonly occurring. Future changes in environmental drivers, including climate change and other anthropogenic disturbances, may further enhance these problems. By compiling monitoring data from countries adjacent to the Baltic Sea, we present spatial ...
Source: Harmful Algae - October 12, 2019 Category: Environmental Health Source Type: research
Cell cycle regulation of the mixotrophic dinoflagellate Dinophysis acuminata: Growth, photosynthetic efficiency and toxin production
Publication date: November 2019Source: Harmful Algae, Volume 89Author(s): Ying Jia, Han Gao, Mengmeng Tong, Donald M. AndersonAbstractThe mixotrophic dinoflagellate Dinophysis acuminata is a widely distributed diarrhetic shellfish poisoning (DSP) producer. Toxin variability of Dinophysis spp. has been well studied, but little is known of the manner in which toxin production is regulated throughout the cell cycle in these species, in part due to their mixotrophic characteristics. Therefore, an experiment was conducted to investigate cell cycle regulation of growth, photosynthetic efficiency, and toxin production in D. acumi...
Source: Harmful Algae - October 12, 2019 Category: Environmental Health Source Type: research
Effects of nitrogen on interspecific competition between two cell-size cyanobacteria: Microcystis aeruginosa and Synechococcus sp.
In this study, Microcystis aeruginosa and Synechococcus sp. were chosen as representative organisms of micro- and pico-cyanobacteria, respectively. A series of nitrate and ammonia conditions (0.02, 0.1, 0.5, and 2.5 mg N L−1) were designed in mono- or co-cultured systems, respectively. Growth rates of the two species were calculated and fitted by the Monod and Logistic equations. Furthermore, the interspecific competition was analyzed using the Lotka–Volterra model. In mono-cultures, the two cyanobacteria displayed faster growth rates in ammonia than in nitrate. Meanwhile, Synechococcus sp. showed faster growth rat...
Source: Harmful Algae - October 10, 2019 Category: Environmental Health Source Type: research
Prorocentrum shikokuense Hada and P. donghaiense Lu are junior synonyms of P. obtusidens Schiller, but not of P. dentatum Stein (Prorocentrales, Dinophyceae)
Publication date: November 2019Source: Harmful Algae, Volume 89Author(s): Hyeon Ho Shin, Zhun Li, Kenneth Neil Mertens, Min Ho Seo, Haifeng Gu, Weol Ae Lim, Yang Ho Yoon, Ho Young Soh, Kazumi MatsuokaAbstractIn Japanese, Chinese and Korean coastal waters, recurrent blooms of a small, elongate Prorocentrum species have been observed in recent years. In previous studies, this species has been respectively identified as P. shikokuense, P. donghaiense and P. dentatum, despite morphological similarity and identical rDNA sequences. To resolve the confusion, morphological features, including the architectural details of the perif...
Source: Harmful Algae - October 10, 2019 Category: Environmental Health Source Type: research
Growth and epiphytic behavior of three Gambierdiscus species (Dinophyceae) associated with various macroalgal substrates
Publication date: November 2019Source: Harmful Algae, Volume 89Author(s): Nurin Izzati Mustapa, Hwa Lin Yong, Li Keat Lee, Zhen Fei Lim, Hong Chang Lim, Sing Tung Teng, Zhaohe Luo, Haifeng Gu, Chui Pin Leaw, Po Teen LimAbstractSpecies of the benthic dinoflagellate Gambierdiscus produce polyether neurotoxins that caused ciguatera fish/shellfish poisoning in human. The toxins enter marine food webs by foraging of herbivores on the biotic substrates like macroalgae that host the toxic dinoflagellates. Interaction of Gambierdiscus and their macroalgal substrate hosts is believed to shape the tendency of substrate preferences a...
Source: Harmful Algae - October 7, 2019 Category: Environmental Health Source Type: research
Attenuation of light influences the size of Microcystis colonies
This study analyzed the attenuation of light intensity in Microcystis colonies, where most objects followed Lambert-Beer law (I=I010-1.256×10-3bc). Intra–colony light limited the maximum thickness of the colony (BMax=4.3×105c−1) and thus affected colony size. Field data showed that the colony size for M. ichthyoblabe was small and limited to approximately 300 μm, while larger colonies were mainly formed by M. aeruginosa and M. wesenbergii respectively. These results imply that the strategies used by morphospecies to allow colonies to tolerate intra–colony light limitation might be different; M. aeruginosa benefi...
Source: Harmful Algae - October 5, 2019 Category: Environmental Health Source Type: research
Effects of small-scale turbulence on two species of Dinophysis
Publication date: November 2019Source: Harmful Algae, Volume 89Author(s): María García-Portela, Beatriz Reguera, Maurizio Ribera d’Alcalà, Francisco Rodríguez, Marina MontresorAbstractDinoflagellate species of Dinophysis, in particular D. acuminata and D. acuta, produce lipophilic toxins that pose a threat to human health when concentrated in shellfish and jeopardize shellfish exploitations in western Europe. In northwestern Iberia, D. acuminata has a long growing season, from spring to early autumn, and populations develop as soon as shallow stratification forms when the upwelling season begins. In contrast, D. acut...
Source: Harmful Algae - October 4, 2019 Category: Environmental Health Source Type: research
Editorial Board
Publication date: September 2019Source: Harmful Algae, Volume 88Author(s): (Source: Harmful Algae)
Source: Harmful Algae - October 1, 2019 Category: Environmental Health Source Type: research
Future HAB science: Directions and challenges in a changing climate
Publication date: Available online 30 September 2019Source: Harmful AlgaeAuthor(s): Mark L. Wells, Bengt Karlson, Angela Wulff, Raphael Kudela, Charles Trick, Valentina Asnaghi, Elisa Berdalet, William Cochlan, Keith Davidson, Maarten De Rijcke, Stephanie Dutkiewicz, Gustaaf Hallegraeff, Kevin J. Flynn, Catherine Legrand, Hans Paerl, Joe Silke, Sanna Suikkanen, Peter Thompson, Vera L. TrainerAbstractThere is increasing concern that accelerating environmental change attributed to human-induced warming of the planet may substantially alter the patterns, distribution and intensity of Harmful Algal Blooms (HABs). Changes in te...
Source: Harmful Algae - October 1, 2019 Category: Environmental Health Source Type: research
