Deep scattering layer
Encyclopedia
The deep scattering layer, sometimes referred to as "The Sound Scattering Layer"; is the name given to a layer in the ocean consisting of a variety of marine animals. It was discovered through the use of sonar
, as ships found a layer that scattered the sound and was thus sometimes mistaken for the seabed
. For this reason it is sometimes called the "false bottom". It can be seen to rise and fall each day in keeping with diel vertical migration
.
Sonar
Sonar is a technique that uses sound propagation to navigate, communicate with or detect other vessels...
, as ships found a layer that scattered the sound and was thus sometimes mistaken for the seabed
Seabed
The seabed is the bottom of the ocean.- Ocean structure :Most of the oceans have a common structure, created by common physical phenomena, mainly from tectonic movement, and sediment from various sources...
. For this reason it is sometimes called the "false bottom". It can be seen to rise and fall each day in keeping with diel vertical migration
Diel vertical migration
Diel vertical migration, also known as diurnal vertical migration, is a pattern of movement that some organisms living in the ocean and in lakes undertake each day. Usually organisms move up to the epipelagic zone at night and return to the mesopelagic zone of the oceans or to the hypolimnion zone...
.