Free Content Carbon Assimilation of Marine Flagellate Blooms in Neritic Waters of Southern Puerto Rico

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Biological productivity, determined with C14 techniques, in offshore blue waters of southern Puerto Rico is about 5.0 mg C m–3 hr–1 under conditions of near light saturation, whereas the brown waters in protected inshore areas, with rich blooms of phytoflagellates, exhibit much greater photosynthetic activity, ranging up to 900 mg C m–3 hr–1. Productivity determinations in Phosphorescent Bay average about 45 mg C m–3 hr–1, which lies between the extremes of low oceanic and very high local bloom values. Assimilation numbers varied widely from 1.0 to 13.0 for the diverse plankton communities. Phytoflagellate populations adapted to tropical conditions sometimes show increasing carbon assimilation up to full sunlight intensity (130,000 lux). The calculated daily productivity of square meter water columns varies over a wide range from 0.8 g C m–2 day–1 to 8.3 g C m–2 day–1 depending upon the abundance and vitality of the photosynthetic organisms.

Document Type: Research Article

Publication date: March 1, 1967

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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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