Abyssal zone
Definition
The abyssal zone is a deep part of the ocean, typically found at depths between 3,000 and 6,000 meters. It is characterized by complete darkness, cold temperatures, and high pressure.
5 Must Know Facts For Your Next Test
- The abyssal zone experiences no sunlight penetration.
- Temperatures in the abyssal zone range from 2 to 3 degrees Celsius.
- Organisms in this zone often exhibit bioluminescence for communication and predation.
- The pressure in the abyssal zone can exceed 600 atmospheres due to the depth.
- Nutrient availability is limited, relying heavily on marine snow and hydrothermal vent communities.
Review Questions
- What are the main environmental conditions of the abyssal zone?
- How do organisms in the abyssal zone adapt to its extreme environment?
- What sources of nutrients support life in the abyssal zone?
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Related terms
photicZone: The upper layer of a body of water that receives enough sunlight for photosynthesis.
benthicZone: The ecological region at the lowest level of a body of water such as an ocean or a lake.
hydrothermalVents: Openings in the sea floor that emit hot, mineral-rich water, supporting unique ecosystems.
