Relationships among upwelling, phytoplankton blooms, and phycotoxins in coastal Oregon shellfish

J. Tweddle, P. G. Strutton, D. G. Foley, L. O'Higgins, A. M. Wood, B. Scott, R. C. Everroad, W. T. Peterson, D. Cannon, M. Hunter, Z. Forster

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Climatologies derived from satellite data (1998 to 2007) were used to elucidate seasonal and latitudinal patterns in winds, sea surface temperature (SST), and chlorophyll concentrations (chl) over the Oregon shelf. These were further used to reveal oceanographic conditions normally associated with harmful algal blooms (HABs) and toxic shellfish events along the Oregon coast. South of 43 degrees N, around Cape Blanco, summer upwelling started earlier and finished later than north of 43 degrees N. Spring blooms occur when light limitation is relieved, before the initiation of upwelling, and secondary, more intense blooms occur approximately 2 wk after upwelling is established. North of 45 degrees N, SST and chl are heavily influenced by the Columbia River plume, which delays upwelling-driven cooling of the surface coastal ocean in spring, and causes phytoplankton blooms (as indicated by increased chl) earlier than expected. The presence of saxitoxin in coastal shellfish, which causes paralytic shellfish poisoning, was generally associated with late summer upwelling. The presence of domoic acid in shellfish, which leads to amnesic shellfish poisoning, was greatest during the transition between upwelling and downwelling regimes. This work demonstrates that satellite data can indicate physical situations when HABs are more likely to occur, thus providing a management tool useful in predicting or monitoring HABs.
Original languageEnglish
Pages (from-to)131-145
Number of pages15
JournalMarine Ecology Progress Series
Volume405
DOIs
Publication statusPublished - 29 Apr 2010

Fingerprint

phycotoxins
shellfish
algal blooms
upwelling
algal bloom
phytoplankton
chlorophyll
surface temperature
remote sensing
amnesic shellfish poisoning
saxitoxins
domoic acid
paralytic shellfish poisoning
Columbia River
satellite data
summer
sea surface temperature
river plume
cooling
oceans

Keywords

  • domoic acid poisoning
  • saxitoxin
  • Oregon coast
  • California current
  • upwelling
  • bloom timing
  • harmful algae
  • paralytic shellfish poisoning

Cite this

Tweddle, J., Strutton, P. G., Foley, D. G., O'Higgins, L., Wood, A. M., Scott, B., ... Forster, Z. (2010). Relationships among upwelling, phytoplankton blooms, and phycotoxins in coastal Oregon shellfish. Marine Ecology Progress Series, 405, 131-145. https://doi.org/10.3354/meps08497

Relationships among upwelling, phytoplankton blooms, and phycotoxins in coastal Oregon shellfish. / Tweddle, J.; Strutton, P. G.; Foley, D. G.; O'Higgins, L.; Wood, A. M.; Scott, B.; Everroad, R. C.; Peterson, W. T.; Cannon, D.; Hunter, M.; Forster, Z.

In: Marine Ecology Progress Series, Vol. 405, 29.04.2010, p. 131-145.

Research output: Contribution to journalArticle

Tweddle, J, Strutton, PG, Foley, DG, O'Higgins, L, Wood, AM, Scott, B, Everroad, RC, Peterson, WT, Cannon, D, Hunter, M & Forster, Z 2010, 'Relationships among upwelling, phytoplankton blooms, and phycotoxins in coastal Oregon shellfish', Marine Ecology Progress Series, vol. 405, pp. 131-145. https://doi.org/10.3354/meps08497
Tweddle, J. ; Strutton, P. G. ; Foley, D. G. ; O'Higgins, L. ; Wood, A. M. ; Scott, B. ; Everroad, R. C. ; Peterson, W. T. ; Cannon, D. ; Hunter, M. ; Forster, Z. / Relationships among upwelling, phytoplankton blooms, and phycotoxins in coastal Oregon shellfish. In: Marine Ecology Progress Series. 2010 ; Vol. 405. pp. 131-145.
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