Changes in Ocean, Climate Portend A Dire Future for Marine Mammals

How does the middle of the Pacific
Ocean, an area that’s practically a
desert when it comes to the nutrients that lie
at the very heart of the marine food chain,
manage to support some of the largest life
forms on Earth?

“It’s an enigma,” says Jeff Polovina,
who, though recently retired, was for years
chief of the Ecosystem and Oceanography
Division at the Pacific Islands Fisheries
Science Center in Honolulu, an agency
of the National Oceanic and Atmospheric
Administration (NOAA).

“Even though there’s little productivity, some foraging hotspots allow deep nutrients . . .

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