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Free Content The Distribution of Planktonic Blue Green Algae Related to the Hydrography of the Georgia Bight

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Oscillatoria was found in the surface waters of the South Atlantic Bight during each of four seasonal cruises. There were large concentrations nearshore in September, December, and April while a shelf wide bloom with filament numbers as high as 36,000 1-1 prevailed in July. Oscillatoria appears to be endemic to the shelf, is not necessarily contributed by the Gulf Stream nor are the blooms related to the subsurface Gulf Stream intrusions. In July water column stability, high temperature and nutrient deficiency seemed to favor Oscillatoria but it is not clear why nearshore blooms occurred in September and December when unstable conditions, cooler water and relatively high nutrient loads existed. While we calculate that nitrogen fixation by Oscillatoria is not as important as the contribution of total nitrogen added from coastal and intrusion sources, the biomass and productivity represented by Oscillatoria must significantly influence secondary production on the shelf.

Document Type: Short Communication

Publication date: 1977-10-01

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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