Abiotic controls of potentially harmful algal blooms in Santa Monica Bay, California

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Author(s) Shipe, R. F., Leinweber, A., Curtaz, J., Gruber, N.
Publication Type Journal Items, Publication Status: Published
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Title Abiotic controls of potentially harmful algal blooms in Santa Monica Bay, California
Author(s) Shipe, R. F.
Leinweber, A.
Curtaz, J.
Gruber, N.
Journal or Series Title Continental shelf research
Volume Number 28
Issue Number 18
Start Page 2584
End Page 2593
ISSN 0278-4343
Publisher Elsevier
Publication Place Amsterdam
Publication Date 2008-00-00
Keyword(s) Algal blooms
Phytoplankton
Ecological associations
Coastal oceanography
Abstract Despite the increasing occurrence of harmful phytoplankton blooms along the North American west coast, records of phytoplankton populations and related environmental conditions are uncommon. In this study, twice monthly measurements in the upper 50 m are used to assess physico-chemical conditions contributing to the growth of potentially harmful bloom taxa over two annual cycles (2004–2005) in the Santa Monica Bay, California. Results were compared to the predictions of the Intaglio model [Smayda, T.J., Reynolds, C.S., 2001. Community assembly in marine phytoplankton: application of recent models to harmful dinoflagellate blooms. Journal of Plankton Research 23, 447–461.] of phytoplankton community assembly. Potentially harmful taxa were present in every surface sample and were numerically dominant during the largest observed blooms, contributing up to 92% of the total phytoplankton abundance >5 μm. Large interannual variation was observed in the dominant taxa and bloom seasonality; Pseudo-nitzschia sp. dominated blooms in early 2004 (February and April), whereas Prorocentrum micans and Lingulodinium polyedrum blooms occurred in May and September of 2005, respectively. The Pseudo-nitzschia sp. blooms were associated with elevated nitrate, dissolved silicon and phosphate concentrations throughout the euphotic zone; the first bloom followed a strong upwelling and the second occurred during the onset of seasonal stratification. In contrast, the blooms of P. micans were associated with highly stratified, low nutrient waters. Multivariate analysis supports the roles of temperature, mixed-layer depth and nutrient concentrations as primary controls of bloom growth, following the conceptual Intaglio model. The strong presence of potentially harmful bloom species in the Santa Monica Bay during this study appears unusual in comparison to limited studies over the last several decades.
DOI 10.1016/j.csr.2008.08.003
Additional Notes Received 9 April 2007. revised 15 April 2008. accepted 11 August 2008. Available online 22 August 2008
Document Type Article
Publication Status Published
Language English
Assigned Organisational Unit(s) 03731
Organisational Unit(s)
NEBIS System Number 000015660
Source Database ID PP-43418
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@article{Shp2008,
  author = "Shipe, R. F. and Leinweber, A. and Curtaz, J. and Gruber, N.",
  title = "{A}biotic controls of potentially harmful algal blooms in {S}anta {M}onica {B}ay, {C}alifornia",
  journal = "Continental shelf research",
  year = 2008,
  volume = "28",
  number = "18",
  pages = "2584--2593",
}


E-Citations record created: Fri, 02 Apr 2010, 00:14:33 CET