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aquatic food production systems
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aquatic food production systems
Marine ORGANISMS can be classifies as:
ZOOPLANKTON
Benthic
PELAGIC
Living on or in the sea bed
Living surrounded by water from above the sea bed to the surface.
They float in the sea and are single-celled organisms that eat the phytoplankton and their waste
Fisheries - Industrial farming and hunting
90% in the oceans
10% in freshwater
Fisheries include
- Shellfish: Oysters, mussels, and molluscs
- Some vertebrates: eels, tuna, etc
Marine ecosystems and food webs
Continental Shelf
Deep oceans have low productivity since light does not reach that much
it's important because:
- About 50% of oceanic productivity
- Upwellings
- Light reaches the shadow seas
- Countries can claim it as theirs
and the only food sources are chemotrophs and dead matter
The marine ecosystem is the largest ecosystem after the whole of Planet Earth because water accounts for more than 70 % of Earth’s surface.
- Oceans
- Mangroves
- Estuaries
- Lagoons
- Coral reefs
- Deep ocean floor
Phytoplankton
Are single-celled organisms that can photosynthesize and are the most important producers in the oceans.
99% of primary productivity
are similar to terrestrial plants in that they contain chlorophyll and require sunlight in order to live and grow.