Seston composition of the bottom waters of Great Lameshur Bay,St. John,US Virgin Islands |
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Authors: | W Hickel |
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Institution: | (1) Present address: Biologische Anstalt Helgoland (Zentrale), Hamburg, Germany (FRG) |
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Abstract: | Seston composition particulate organic carbon (POC), particulate nitrogen (PN), phyto- and microzooplankton numbers and biomass] was investigated in the bottom waters of Great Lameshur Bay, St. John, Virgin Islands (USA), in October, 1970 during Tektite II Mission 17–50. Mean values of 67.4 g POC · I-1 and 7.2 g PN · I-1 were determined. A mean phytoplankton carbon content of 42.2 g · I-1 and zooplankton carbon content of 5.5 g · I-1 were calculated from counts. The phytoplankton consisted mainly of dinoflagellates 71.2% phytoplankton carbon. Copepods were the dominant zooplankters (61.8% zooplankton carbon), followed by larvaceans (30.9% zooplankton carbon). Organic carbon content of counted zooplankton faecal pellets ranged between 0.4 and 1.6 g · I-1, and amounted probably to about 15% of the total zooplankton carbon value. Plankton and detritus components as possible food for coral-reef animals are discussed. The ratio carbon: nitrogen of suspended particles is compared to that of sedimented matter. |
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