Benthic realm

Definition

The benthic realm is the ecological region at the lowest level of a body of water, including the sediment surface and some sub-surface layers. It is home to various organisms adapted to life on or near the bottom of aquatic environments.

5 Must Know Facts For Your Next Test

1. The benthic realm includes both shallow coastal areas and deep ocean floors.
2. Benthic organisms include invertebrates like crustaceans and worms, as well as certain types of algae and bacteria.
3. Many benthic organisms play a crucial role in nutrient recycling by breaking down organic matter.
4. The conditions in the benthic realm can vary greatly depending on depth, temperature, salinity, and oxygen levels.
5. Benthic zones are divided into subzones such as the littoral zone (nearshore) and the abyssal zone (deep ocean floor).

Review Questions

Related terms

Pelagic Realm: The open water area of aquatic environments, away from the bottom or shore.

Littoral Zone:

The nearshore area where sunlight penetrates to the sediment allowing aquatic plants to grow.

Abyssal Zone: A deep part of the ocean floor characterized by high pressure, low temperatures, and no sunlight.