A NATURAL BLOOM DOWN UNDER?Phytoplankton blooms recur naturally off tiny Kerguelen Island, between South Africa and Australia in the Southern Ocean. Greens, yellows, and reds indicate increasingly higher levels of chlorophyll in photosynthesizing phytoplankton. The blooms are fueled by iron and other nutrients brought to the surface by currents flowing across a 600-meter-deep shelf. (Map courtesy of Stephane Blain of CNRS/Universite de la Mediterranee )[back]
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