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Free Content Plankton of the Florida Current V. Environmental Conditions, Standing Crop, Seasonal and Diurnal Changes at a Station Forty Miles East of Miami

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This is a survey of the standing crop of plankton in the Florida Current, its vertical, seasonal and diurnal changes, and of relevant environmental conditions. The top 100 meters is considered to be the euphotic zone. Most of the phytoplankton is nannoplankton and is concentrated in the euphotic zone, where it shows some seasonal change. Zooplankton also show a small seasonal change and a marked diurnal migration in the euphotic zone. Details are given for siphonophores, chaetognaths, copepods, euphausids, pteropods and young fish. There is some seasonal fluctuation in the total phosphorus content of the euphotic zone, and most of the phosphorus is in the form of dissolved organic matter. A smaller fraction comprises live nannoplankton and detritus, and a very small fraction is due to zooplankton. Both the inorganic phosphorus and inorganic nitrogen are extremely deficient at all times in the euphotic zone.

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Document Type: Research Article

Publication date: January 1, 1957

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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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