TY - JOUR
T1 - Coastal upwelling linked to toxic Pseudo-nitzschia australis blooms in Los Angeles coastal waters, 2005-2007
AU - Schnetzer, Astrid
AU - Jones, Burton
AU - Schaffner, Rebecca A.
AU - Cetinić, Ivona
AU - Fitzpatrick, Elizabeth
AU - Miller, Peter E.
AU - Seubert, Erica L.
AU - Caron, David A.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This research was supported by grants from the National Oceanic and Atmospheric Administration (Monitoring and Event Response for Harmful Algal Blooms (MERHAB) program MERHAB NA05NO54781228 and Sea Grant NA06OAR4170012) awarded to DC and AS, and Environmental Protection Agency (RD-83170501) awarded to DC.
PY - 2013/6/10
Y1 - 2013/6/10
N2 - Harmful algal blooms dominated by the diatom Pseudo-nitzschia spp. have become a perennial but variable event within surface waters near the greater Los Angeles area. Toxic blooms during spring seasons from 2005 to 2007 varied strongly in their overall toxicity and duration. Differences in bloom dynamics were linked to differences in storm-induced river discharge following episodic rain events and coastal upwelling, both major coastal processes that led to the injection of nutrients into coastal surface waters. Heavy river runoff during early 2005, a record-rainfall year, favored a phytoplankton community mainly comprised of algal taxa other than Pseudo-nitzschia. The spring bloom during 2005 was associated with low domoic acid surface concentrations and minor contributions of (mainly) P. delicatissima to the diatom assemblage. In contrast, highly toxic P. australis-dominated blooms during spring seasons of 2006 and 2007 were linked to strong upwelling events. River discharge quotas in 2006 and 2007, in contrast to 2005, fell well below annual averages for the region. Surface toxin levels were linked to colder, more saline (i.e. upwelled) water over the 3-year study, but no such consistent relationship between domoic acid levels and other physiochemical parameters, such as macronutrient concentrations or nutrient ratios, was observed. © The Author 2013. Published by Oxford University Press. All rights reserved.
AB - Harmful algal blooms dominated by the diatom Pseudo-nitzschia spp. have become a perennial but variable event within surface waters near the greater Los Angeles area. Toxic blooms during spring seasons from 2005 to 2007 varied strongly in their overall toxicity and duration. Differences in bloom dynamics were linked to differences in storm-induced river discharge following episodic rain events and coastal upwelling, both major coastal processes that led to the injection of nutrients into coastal surface waters. Heavy river runoff during early 2005, a record-rainfall year, favored a phytoplankton community mainly comprised of algal taxa other than Pseudo-nitzschia. The spring bloom during 2005 was associated with low domoic acid surface concentrations and minor contributions of (mainly) P. delicatissima to the diatom assemblage. In contrast, highly toxic P. australis-dominated blooms during spring seasons of 2006 and 2007 were linked to strong upwelling events. River discharge quotas in 2006 and 2007, in contrast to 2005, fell well below annual averages for the region. Surface toxin levels were linked to colder, more saline (i.e. upwelled) water over the 3-year study, but no such consistent relationship between domoic acid levels and other physiochemical parameters, such as macronutrient concentrations or nutrient ratios, was observed. © The Author 2013. Published by Oxford University Press. All rights reserved.
UR - http://hdl.handle.net/10754/562810
UR - http://academic.oup.com/plankt/article/35/5/1080/1535775/Coastal-upwelling-linked-to-toxic-Pseudonitzschia
UR - http://www.scopus.com/inward/record.url?scp=84883482202&partnerID=8YFLogxK
U2 - 10.1093/plankt/fbt051
DO - 10.1093/plankt/fbt051
M3 - Article
SN - 0142-7873
VL - 35
SP - 1080
EP - 1092
JO - Journal of Plankton Research
JF - Journal of Plankton Research
IS - 5
ER -