Pseudo-nitzschia physiological ecology, phylogeny, toxicity, monitoring and impacts on ecosystem health
Trainer, Vera L.
Bates, Stephen S.
Thessen, Anne E.
Cochlan, William P.
Adams, Nicolaus G.
Trick, Charles G.
MetadataShow full item record
KeywordAlgal phylogeny; Algal taxonomy; Amnesic shellfish poisoning; Diatom sexual reproduction; Domoic acid; Harmful algal bloom; Pseudo-nitzschia
Over the last decade, our understanding of the environmental controls on Pseudo-nitzschia blooms and domoic acid (DA) production has matured. Pseudo-nitzschia have been found along most of the world's coastlines, while the impacts of its toxin, DA, are most persistent and detrimental in upwelling systems. However, Pseudo-nitzschia and DA have recently been detected in the open ocean's high-nitrate, low-chlorophyll regions, in addition to fjords, gulfs and bays, showing their presence in diverse environments. The toxin has been measured in zooplankton, shellfish, crustaceans, echinoderms, worms, marine mammals and birds, as well as in sediments, demonstrating its stable transfer through the marine food web and abiotically to the benthos. The linkage of DA production to nitrogenous nutrient physiology, trace metal acquisition, and even salinity, suggests that the control of toxin production is complex and likely influenced by a suite of environmental factors that may be unique to a particular region. Advances in our knowledge of Pseudo-nitzschia sexual reproduction, also in field populations, illustrate its importance in bloom dynamics and toxicity. The combination of careful taxonomy and powerful new molecular methods now allow for the complete characterization of Pseudo-nitzschia populations and how they respond to environmental changes. Here we summarize research that represents our increased knowledge over the last decade of Pseudo-nitzschia and its production of DA, including changes in worldwide range, phylogeny, physiology, ecology, monitoring and public health impacts.
This paper is not subject to U.S. copyright. The definitive version was published in Harmful Algae 14 (2012): 271-300, doi:10.1016/j.hal.2011.10.025.
Suggested CitationHarmful Algae 14 (2012): 271-300
Showing items related by title, author, creator and subject.
Diversity and toxicity of Pseudo-nitzschia species in Monterey Bay : perspectives from targeted and adaptive sampling Bowers, Holly A.; Ryan, John P.; Hayashi, Kendra; Woods, April; Marin, Roman; Smith, G. Jason; Hubbard, Katherine A.; Doucette, Gregory J.; Mikulski, Christina M.; Gellene, Alyssa G.; Zhang, Yanwu; Kudela, Raphael M.; Caron, David A.; Birch, James M.; Scholin, Christopher A. (2018-08)Monterey Bay, California experiences near-annual blooms of Pseudo-nitzschia that can affect marine animal health and the economy, including impacts to tourism and commercial/recreational fisheries. One species in particular, ...
Domoic acid assimilation in copepods by consuming organic polymers and Pseudo-nitzschia from experiments conducted using water samples collected in northern Gulf of Mexico in 2017 and 2018. Marquez Jr., Israel A.; Maiti, Kanchan; Krause, Jeffrey W (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: email@example.com, 2020-07-14)Domoic acid assimilation in copepods by consuming organic polymers and Pseudo-nitzschia. Results from experiments designed to investigate the contribution of organic polymers and Pseudo-nitzschia to domoic acid trophic ...
Intra- and interspecies differences in growth and toxicity of Pseudo-nitzschia while using different nitrogen sources Thessen, Anne E.; Bowers, Holly A.; Stoecker, Diane K. (2009-01)Clonal cultures of plankton are widely used in laboratory experiments and have contributed greatly to knowledge of microbial systems. However, many physiological characteristics vary drastically between strains of the ...