Where plankton suffers, so does the entire ocean food chain. When environmenmental conditions change, often triggered by too much of a nutrient—such as nitrogen or phosphorus from fertilizer ...

The diagram shows how mercury can accumulate in the food chain. In the sea, tiny animals and plants called plankton absorb the mercury compounds. When the plankton are eaten by small fish ...

Plankton are microscopic plants and animals that make up the base of the marine food chain, meaning they are a basic source of energy for marine life all the way up to large predators like sharks ...

The researchers put the plankton in three categories ... deicing salt may not sufficiently protect a vital link in the food ...

Features experiments in an aquarium, illustrating the food chain as a continuous cycle. Shows how each type of living thing depends on the other, when the cycle is properly balanced.

Watch on DVD or Blu-ray starting January 1st, 1974 - Buy Plankton to Fish: A Food Cycle DVD ...

The result? A frightening phenomenon that's making seawater more acidic, spelling disaster for many marine animals, from plankton and coral up the food chain to sea stars, salmon, sea otters, whales — ...