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DIDAVISION


MARINE LIFE


MARINE LIFE
MARINE LIFE

Nowadays, itís generally accepted that life appeared for the first time in the seas. Different forms of sea-life: mammals, arthropods, reptiles, fish. Banks of fish. Different sea-zones: pelagic and benthonic. Plankton and zoo-plankton. Life in benthonic regions. Summary.


INTRODUCTION
- Life appeared for the very first time in the seas, many millions of years ago.
- Animal groups: Mammals, reptiles, insects, fishes, crustaceans, arthropoda
- The seas occupy three-quarters of the planet., and produce only one-third of the total plant mass.
- Areas supporting life and nutrients.

MARINE ZONES
- The pelagic Zone. The bentonic Zone.
- The Phitoplancton
- The Zooplancton. The Krill.
- The Blue Whale.
- Sharks.

THE BENTONIC ZONE
- Extension of the Bentonic Zone.
- Forms of life: coral reefs, algae, fish, crustaceans.
- Presence of life when we go deeper than 1,000 metres.
- Octopuses. Different kinds of fish
- Pollution and the stability of the biological cycles.

SUMMARY

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