Global warming to have major impact on ocean food web

PARIS (AFP) – A new study of the oceans suggests that phytoplankton — the vital first link in the food chain of the seas — will be hugely affected by global warming.

Fisheries in the tropics and mid-latitudes could be badly hit by the loss of these micro-organisms as a result of warmer waters, the paper implies.

Phytoplankton grow in the upper layers of the ocean, needing light as well as nitrogen, phosphate and iron to grow. These nutrients come from the cold deep ocean, and are brought to the surface by currents.

Oregon State University botanist Michael Behrenfeld and colleagues pored over nearly a decade’s-worth of satellite data to see how these tiny, unsung plants of the ocean surface respond to shifts in temperature.

Yahoo