A journey through a marine food chain, from tiny plankton to the ocean's giants.
- Phytoplankton are the basis of the oceanic food chain.
- In the Pacific Ocean, millions of herring feed on these blooms of phytoplankton.
- Secondary consumers, dolphins and sea birds feed on the herring.
- Tertiary consumers such as, killer whales, then feed on dolphins and seals.
It is summer in Alaska.
As the Sun glares down on the ocean, some of the smallest living plants come to life: phytoplankton... these tiny primary producers form the basis of a vast, complex food chain.
Phytoplankton form great blooms, kilometres in diameter.
Phytoplankton blooms – over 1000 species
Newly hatched ...
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