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Notes on a Mesodinium rubrum red tide in San Francisco Bay (California, USA)

September 1, 1994

Discrete red patches of water were observed in South San Francisco Bay (USA) on 30 April 1993, and examination of live samples showed that this red tide was caused by surface accumulations of the pigmented ciliate Mesodinium rubrum . Vertical profiles showed strong salinity and temperature stratification in the upper 5 m, peak chlorophyll fluorescence in the upper meter, and differences in the small-scale density structure and fluorescence distribution among red patches. Events preceding this Mesodinium red tide included: (i) heavy precipitation and run-off, allowing for strong salinity stratification; (ii) a spring diatom bloom where the chlorophyll a concentration reached 50 mg m −3 ; (ii) depletions of dissolved inorganic N and Si in the photic zone; and (iv) several days of rapid warming and stabilization of the upper surface layer. These conditions may be general prerequisites for M.rubrum blooms in temperate estuaries.

Publication Year 1994
Title Notes on a Mesodinium rubrum red tide in San Francisco Bay (California, USA)
DOI 10.1093/plankt/16.9.1269
Authors James E. Cloern, Brian E. Cole, Stephen W. Hager
Publication Type Article
Publication Subtype Journal Article
Series Title Journal of Plankton Research
Index ID 70185388
Record Source USGS Publications Warehouse
USGS Organization California Water Science Center; Toxic Substances Hydrology Program