Ice-associated phytoplankton blooms in the southeastern Bering Sea

Details Ice-associated phytoplankton blooms in the southeastern Bering Sea Ice-associated phytoplankton blooms in the southeastern Bering Sea

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3406612j&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 6, CiteID L06612

Physics

4

Biogeosciences: Modeling, Cryosphere: Sea Ice (4540), Cryosphere: Remote Sensing, Global Change: Abrupt/Rapid Climate Change (4901, 8408), Oceanography: General: Physical And Biogeochemical Interactions

Scientific paper

Ice-associated phytoplankton blooms in the southeastern Bering Sea can critically impact the food web structure, from lower tropic level production to marine fisheries. By coupling pelagic and sea ice algal components, our 1-D ecosystem model successfully reproduced the observed ice-associated blooms in 1997 and 1999 at the NOAA/PMEL mooring M2. The model results suggest that the ice-associated blooms were seeded by sea ice algae released from melting sea ice. For an ice-associated bloom to grow and reach the typical magnitude of phytoplankton bloom in the region, ice melting-resulted low-salinity stratification must not be followed by a strong mixing event that would destroy the stratification. The ice-associated blooms had little impacts on the annual primary production, but had significant impacts in terms of shifting phytoplankton species, and the timing and magnitude of the bloom. These changes, superimposed on a gradual ecosystem shift attributed to global warming, can dramatically alter the Bering Sea ecosystem.

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