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Harmful Algae
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#1Bora Lee (Chonnam National University)H-Index: 1
#2Myung Gil Park (Chonnam National University)H-Index: 16
Abstract Species belonging to the toxic dinoflagellate genus Ostreopsis are widespread, occurring from tropical to temperate waters. As mainly benthic/epiphytic species, they would be expected to show distinct geographical patterns. In this study, ribosomal DNA (rDNA) sequences from partial nuclear LSU D8-D10, 5.8S, and ITS regions were determined for 169 isolates of Ostreopsis species collected from three coastal sites (i.e., Jeju Island, Chuja Island, and Pohang) within Korea. The phylogenetic...
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#1Tyler Gorham (OSU: Ohio State University)H-Index: 3
#2Elisabeth Dowling Root (OSU: Ohio State University)H-Index: 12
Last. Jiyoung Lee (OSU: Ohio State University)H-Index: 20
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Abstract Freshwater cyanobacterial blooms have increased in geographic distribution and intensity in recent decades worldwide. Cyanotoxins produced by many of these blooms, such as microcystins, are observed to play a role in tumor promotion and have been associated with increased liver cancer rates at the population level. Exposure occurs primarily via contaminated water (ingestion, inhalation, dermal contact), either from treated drinking water or during recreation in impacted surface waters; ...
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#1Bum Soo Park (University of Texas at Austin)H-Index: 9
#2Deana L. Erdner (University of Texas at Austin)H-Index: 20
Last. Edward J. Buskey (University of Texas at Austin)H-Index: 36
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Abstract The association between phytoplankton blooms and oil spills is still controversial despite numerous studies. Surprisingly, to date, there have been no studies on the effect of bacterial communities (BCs) exposed to crude oil on phytoplankton growth, even though crude oil changes BCs, which can then affect phytoplankton growth and species composition. Co-culture with crude oil-exposed BCs significantly stimulated the growth of Prorocentrum texanum in the laboratory. To gain more direct e...
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#1Anna J. Olesen (Wild Center)
#2Sara Harðardóttir (Laval University)
Last. Nina Lundholm (Wild Center)H-Index: 31
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Abstract In spring 2016, two silos containing liquid nitrogen-containing fertilizer collapsed on a harbor in Fredericia, Denmark. More than 2,750 tons of fertilizer spilled into inner Danish waters. A bloom of Pseudo-nitzschia occurred approximately one month after the incident. The bloom caused a 5-week quarantine of numerous mussel-harvesting areas along the eastern coast of Jutland. The levels of domoic acid measured up to 49 mg kg−1 in mussel meat after the bloom. In the months following the...
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#1Alison Turnbull (UTAS: University of Tasmania)H-Index: 3
#2Navreet Malhi (South Australian Research and Development Institute)H-Index: 3
Last. Gustaaf M. Hallegraeff (UTAS: University of Tasmania)H-Index: 55
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Abstract Up to 13.6 mg STX.2HCl equiv. kg−1 of paralytic shellfish toxins (PST) have been found in the hepatopancreas of Southern Rock Lobster, Jasus edwardsii, on the east coast of Tasmania. Blooms of the toxic dinoflagellate Alexandrium catenella have been reported in this region since 2012. Experimental work was undertaken to improve the understanding of the uptake and depuration mechanisms involved. Adult male lobsters were fed highly toxic mussels (6 mg STX.2HCl equiv. kg−1) sourced from th...
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#1Suema Branco (UFRJ: Federal University of Rio de Janeiro)H-Index: 3
#2Mair M.M. Oliveira (UFRJ: Federal University of Rio de Janeiro)H-Index: 1
Last. Mariângela Menezes (UFRJ: Federal University of Rio de Janeiro)H-Index: 9
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Abstract The genus Alexandrium comprises some of the most potentially toxic marine algae. A new toxic species of Alexandrium, A. fragae sp. nov., was found in Guanabara Bay, Rio de Janeiro, southern Brazil. The new species produces GTX2&3 and STX. The cell morphology of A. fragae resembles A. minutum in many characters, including the small size; the rounded-elliptical shape; and the shapes of the apical pore complex (APC), first apical plate (1′), sixth precingular plate (6″), and anterior and p...
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Abstract Microcystins (MCs) are secondary metabolites produced by cyanobacteria and have been well-documented in temperate and tropical regions. However, knowledge of the production of MCs in extremely cold environments is still in its infancy. Recently, examination of 100-year-old Antarctic cyanobacterial mats collected from Ross Island and the McMurdo Ice Shelf during Captain R.F. Scott's Discovery Expedition revealed that the presence of MCs in Antarctica is not a new phenomenon. Here, morpho...
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#1Yanfei Wang (UD: University of Delaware)H-Index: 1
#2Kathryn J. Coyne (UD: University of Delaware)H-Index: 23
Abstract Shewanella sp. IRI-160 is an algicidal bacterium isolated from Delaware Inland Bays. It secretes water-soluble compounds that inhibit the growth of dinoflagellates. Previous research indicated that this bacterium does not have a negative impact on other algal species. In this research, Shewanella sp. IRI-160 was immobilized to different porous matrices, including agarose, alginate hydrogel, cellulosic sponge, and polyester foam. The retention of Shewanella sp. IRI-160 on or within these...
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#1Julia A. Ekstrom (UC Davis: University of California, Davis)H-Index: 13
#2Stephanie K. Moore (NOAA: National Oceanic and Atmospheric Administration)H-Index: 9
Last. Terrie Klinger (UW: University of Washington)H-Index: 17
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Abstract The human dimensions of harmful algal blooms (HABs) are becoming increasingly apparent as they grow in frequency and magnitude in some regions of the world under changing ocean conditions. One such region is the U.S. West Coast, where HABs of toxigenic species of Pseudo-nitzschia have been found to coincide with or closely follow periods of warming. In 2015, the region experienced a massive HAB of Pseudo-nitzschia that was associated with the 2014-16 Northeast Pacific marine heatwave. T...
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#1Nayani K. Vidyarathna (UD: University of Delaware)
#2Erin Papke (UD: University of Delaware)
Last. Mark E. Warner (UD: University of Delaware)H-Index: 37
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Abstract Characterizing the thermal niche of harmful algae is crucial for understanding and projecting the effects of future climate change on harmful algal blooms. The effects of 6 different temperatures (18–32 °C) on the growth, photophysiology, and toxicity were examined in the dinoflagellate Karlodinium veneficum, and the raphidophytes, Heterosigma akashiwo and Chattonella subsalsa from the Delaware Inland Bays (DIB). K. veneficum and H. akashiwo had skewed unimodal growth patterns, with tem...
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Top fields of study
Algal bloom
Ecology
Dinoflagellate
Botany
Biology