Question

Which of the following statements describes an abyssopelagic zone?

A. This zone measures 20,000 feet to 36,000 feet below the surface, and has a name that means "unseen."
B. This zone measures from 600 to 3,000 feet below the surface, and is sometimes referred to as the “twilight zone” because of the amount of ambient light available.
C. This ecosystem is in a transitional area that is influenced by the cycle between low and high tides.
D. At the depths of 13,000 to 20,000 feet, this zone resembles a bottomless pit of complete darkness.

Answer 1

Which of the following statements describes
B. This zone measures from 600 to 3,000 feet below the surface, and is sometimes referred to as the “twilight zone” because of the amount of ambient light available.

Answer 2

An abyssopelagic zone is a zone which resembles a bottomless pit of complete darkness at the depth of 13000 to 20000 feet.

What is Abyssopelagic zone?

This zone is also called as Abyss zone which is derived from a Greek word meaning Bottomless.

This zone remains in complete darkness at the depth of 4000-6000 meters with the temperature ranging from 2-3 degree Celsius.

Due to absence of light there is no oxygen present and thus it creates a difficult place for the survival of the organism if it accidentally reaches there.

Ecosystem of Abyssopelagic Zone:

Organism feeds on detritus organism as there is an absence of Producers i.e. green plants.

The seafloor consists of calcareous shell of zooplankton and phytoplankton.

There is a presence of trenches or fissures plunging deep down the ocean floor and present in this zone.

Presence of Flora and Fauna:

The  abyssopelagic zone comprises of microorganisms, crustaceans, molluscans.

There is a presence of fish species such as demersal and benthopelagic

The species here evolve morphologically for their survival which could keep them out of oxygen depleted water above the sea floor.

Ecological and Environmental Concern:

Due to increase in temperature, though this zone is not actively getting damaged but is observing the acidification.

Along with it, presence of plastic resulting into microorganism consuming plastic than detritus substances.

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