High CO2 and Silicate Limitation Synergistically Increase the Toxicity of Pseudo-nitzschia fraudulenta
作者： Avery O. Tatters , Fei-Xue Fu , David A. Hutchins
DOI: 10.1371/JOURNAL.PONE.0032116
关键词:
摘要: Anthropogenic CO2 is progressively acidifying the ocean, but responses of harmful algal bloom species that produce toxins can bioaccumulate remain virtually unknown. The neurotoxin domoic acid produced by globally-distributed diatom genus Pseudo-nitzschia. This toxin responsible for amnesic shellfish poisoning, which result in illness or death humans and regularly causes mass mortalities marine mammals birds. Domoic production Pseudo-nitzschia cells known to be regulated nutrient availability, potential interactions with increasing seawater concentrations are poorly understood. Here we present experiments measuring acclimatized cultures fraudulenta demonstrate a strong synergism between projected future levels (765 ppm) silicate-limited growth, greatly increases cellular toxicity relative growth under modern atmospheric (360 pre-industrial (200 conditions. Cellular Si∶C ratios decrease CO2, trend opposite seen production. coastal California upwelling system where this was isolated currently exhibits rapidly anthropogenic acidification, as well widespread episodic silicate limitation growth. Our results suggest current ecosystem human health impacts toxic blooms could exacerbated ocean acidification ‘carbon fertilization’ ocean.
harvard.edu
paperity.org
researchgate.net 参考文章(43)
Allan Cembella, G. M. Hallegraeff, D. M. Anderson, Physiological ecology of harmful algal blooms EPIC3Heidelberg, Springer-Verlag.. ,(1998)
Ecology of harmful algae Springer Verlag. ,(2006) , 10.1007/978-3-540-32210-8
Janet R. Stein-Taylor, Culture methods and growth measurements Cambridge University Press. ,(1973)
Giselle F. Firme, Eden L. Rue, Debra A. Weeks, Kenneth W. Bruland, David A. Hutchins, Spatial and temporal variability in phytoplankton iron limitation along the California coast and consequences for Si, N, and C biogeochemistry Global Biogeochemical Cycles. ,vol. 17, pp. 1016- ,(2003) , 10.1029/2001GB001824
Fei-Xue Fu, Mark E. Warner, Yaohong Zhang, Yuanyuan Feng, David A. Hutchins, EFFECTS OF INCREASED TEMPERATURE AND CO2ON PHOTOSYNTHESIS, GROWTH, AND ELEMENTAL RATIOS IN MARINESYNECHOCOCCUSANDPROCHLOROCOCCUS(CYANOBACTERIA) Journal of Phycology. ,vol. 43, pp. 485- 496 ,(2007) , 10.1111/J.1529-8817.2007.00355.X
Gustaaf M. Hallegraeff, OCEAN CLIMATE CHANGE, PHYTOPLANKTON COMMUNITY RESPONSES, AND HARMFUL ALGAL BLOOMS: A FORMIDABLE PREDICTIVE CHALLENGE Journal of Phycology. ,vol. 46, pp. 220- 235 ,(2010) , 10.1111/J.1529-8817.2010.00815.X
Emily Sekula-Wood, Claudia Benitez-Nelson, Steve Morton, Clarissa Anderson, Christopher Burrell, Robert Thunell, Pseudo-nitzschia and domoic acid fluxes in Santa Barbara Basin (CA) from 1993 to 2008 Harmful Algae. ,vol. 10, pp. 567- 575 ,(2011) , 10.1016/J.HAL.2011.04.009
Y Pan, DV Subba Rao, KH Mann, RG Brown, R Pocklington, Effects of silicate limitation on production of domoic acid, a neurotoxin, by the diatom Pseudo-nitzschia multiseries. II. Continuous culture studies Marine Ecology Progress Series. ,vol. 131, pp. 225- 233 ,(1996) , 10.3354/MEPS131225
Mark A. Brzezinski, David M. Nelson, The annual silica cycle in the Sargasso Sea near Bermuda Deep Sea Research Part I: Oceanographic Research Papers. ,vol. 42, pp. 1215- 1237 ,(1995) , 10.1016/0967-0637(95)93592-3
YONG G. PENG, JOHN S. RAMSDELL, Brain Fos induction is a sensitive biomarker for the lowest observed neuroexcitatory effects of domoic acid. Toxicological Sciences. ,vol. 31, pp. 162- 168 ,(1996) , 10.1093/TOXSCI/31.2.162