Advisory 2008-No. 1

Subregion Comparison of Zooplankton

Graphs of Subregion Comparison of Zooplankton

Summer, fall, and early winter zooplankton biomasses have been decreasing in the Gulf of Maine. These trends continued into 2007 for summer and fall, but the 2007 early winter estimate was near the long-term average, suggesting that the long-term decrease in early winter zooplankton may be ending. On Georges Bank, zooplankton biomasses have been at intermediate levels during the past several years. There is evidence for decreasing zooplankton biomasses in the summer, but relatively stable biomass in the fall. Coverage has not been adequate on Georges Bank in recent years to estimate reliable zooplankton biomasses during early winter. On the Southern New England shelf, summer, fall, and early winter zooplankton biomasses have been relatively stable and high through the last several years. There is evidence for decreasing zooplankton biomasses in the summer, but relatively stable biomass in the fall and early winter. In the Middle Atlantic Bight, summer, fall, and early winter zooplankton biomasses have been relatively stable and high through the last several years. The coverage, however, has been spotty in recent years, making it difficult to discern trends

For further information, contact:Kevin.Friedland@noaa.gov

 

 



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