Photo: Warming Oceans Put Kink in Food Chain, Study Says

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A map illustrates levels of phytoplankton in the world's oceans from 1997 through 2000—red regions being highest, blue lowest. A recent study found that the growth of the tiny marine plants, which constitute the base of the ocean food chain, is tightly linked to changes in the climate.

Map courtesy NASA/Goddard Space Flight Center Scientific Visualization Studio

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