Zones of the Ocean
Classification of the Marine Environment
- Classification by light
- Photic and aphotic
- Phytoplankton need light to photosynthesize and can only thrive in the photic zone
- Zooplankton (animals) and bacteria do not need light and inhabit the oceans down to the deep-sea floor
- Classification by location
- Water and sea floor divided into specific zones: benthic & pelagic
- By water depth divided into coastal, neritic, oceanic
- Each has distinct physical and chemical characteristics
- Each supports different organisms
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