Abstract
Phytoplankton production and associated variables were measured in Flax Pond, a 52 ha salt marsh on the north shore of Long Island, New York, from July 1972 to October 1973. Measurements made up to five times per day, once per week, yielded a mean annual net primary production, determined by the 14C technique, of 20.5 mg C/m3/h; daily means were as high as 60.0 mg C/m3/h. However, when productivity was calculated for the entire marsh ecosystem, the shallow water in the salt marsh produced only 11.7 g C/m2 of marsh/year. There was a net flux of phytoplankton from the coastal waters into the marsh; during the summer up to 0.2 g chlorophy 11/m2 of marsh was carried in with the tides daily and remained in the marsh. Analysis of the productivity data, as well as variables associated with productivity (pH, standing crop, nutrients, extinction coefficient), indicated that the aquatic portion of the marsh behaved more as a net consumer rather than a net producer of phytoplankton.
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Communicated by M.R. Tripp, Newark
Research carried out at Brookhaven National Laboratory, supported by the U.S. Atomic Energy Commission and the National Science Foundation under Grant No. AG-375.
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Moll, R.A. Phytoplankton in a temperate-zone salt marsh: Net production and exchanges with coastal waters. Mar. Biol. 42, 109–118 (1977). https://doi.org/10.1007/BF00391561
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DOI: https://doi.org/10.1007/BF00391561