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The importance of the timing of winter-spring plankton blooms to exosystem productivity
Ist Teil von
EOS, Transactions, American Geophysical Union; (United States), 1990, Vol.71:2
Ort / Verlag
United States
Erscheinungsjahr
1990
Link zum Volltext
Beschreibungen/Notizen
The timing of winter-spring phytoplankton blooms in temperate and high latitudes varies by as much as 6 weeks among years, being tied closely to the amount of solar insolation received. One effect of this variation is that water temperature and its effect on the matabolic rate of pelagic and benthic consumers will vary accordingly. We have constructed a simulation model based on 15 years of data on water temperatures and solar insolation not only to predict the timing of the winter-spring plankton bloom in coastal waters near Boothbay Harbor, Maine, but to investigate the various processes that are important in carbon flow through the ecosystem. The model has shown that variable bloom timing results in blooms occurring over a range of relatively cold water temperatures (ca. -1 to 5[degrees]C) and that the water temperature during and following the bloom is of paramount importance to the partitioning of the primary production into higher pelagic and benthic trophic levels. Blooms occurring in waters at or near 0[degrees]C may be accompanied by very low metabolism of both pelagic and benthic consumers. These results could have significant implications for how we view oceanographic processes ranging from fisheries production to the global carbon cycle.