Thursday, November 21, 2013

NOAA:  Zooplankton Decline Reported in North Atlantic; Ocean Temperatures Remain Warm

Eight boxes represent index areas for long-term sea surface temperature (SST) trends for the Northeast Shelf ecosystem; annual mean, minimum, and maximum SST for the period 1854-2011 was calculated for the index area. The grey shaded area of the Northeast Shelf was used in the calculation of thermal habitat distribution for the ecosystem. (Credit: Kevin Friedland, NEFSC/NOAA) Click to enlarge.
The microscopic creatures that make up a critical link in the ocean food chain declined dramatically the first half of this year in the North Atlantic as ocean temperatures remained among the warmest on record, federal scientists say.

Springtime plankton blooms off the coast of northern New England were well below average this year, leading to the lowest levels ever seen for the tiny organisms that are essential to maintaining balance in the ocean food chain, said Kevin Friedland, a marine scientist with the National Oceanic and Atmospheric Administration.

The absence of the normal surge of plankton in the spring is a concern because that’s when cod and haddock and many other species produce offspring, Friedland said.

The spring surge also provides the foundation for normally abundant zooplankton levels that have made waters from the Middle Atlantic to New England productive for centuries.

NOAA: Zooplankton Decline Reported in North Atlantic; Ocean Temperatures Remain Warm

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