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, high pressure, and cold temperatures.
5 Must Know Facts For Your Next Test
- The abyssal zone makes up about 60% of the Earth's surface.
- Temperatures in the abyssal zone range from 2 to 3 degrees Celsius.
- Organisms in this zone have adapted to extreme pressure and lack of light.
- The primary source of nutrients for abyssal organisms is marine snow - organic material falling from upper layers of the ocean.
- Hydrothermal vents, which support unique ecosystems, are often found in the abyssal zone.
Review Questions
- What adaptations do organisms in the abyssal zone have to survive high pressure?
- Why is there no light in the abyssal zone?
- What is marine snow and why is it important for life in the abyssal zone?
"Abyssal zone" appears in:
Subjects (1)
Related terms
Benthos: Organisms that live on or near the seabed, also known as the benthic zone.
Pelagic Zone: The open ocean area away from the coast and sea floor.
Hydrothermal Vents: Openings in the sea floor that emit hot, mineral-rich water supporting diverse ecosystems.
