What does diel vertical migration mean?
Definitions for diel vertical migration
diel ver·ti·cal mi·gra·tion
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Wikipedia
Diel vertical migration
Diel vertical migration (DVM), also known as diurnal vertical migration, is a pattern of movement used by some organisms, such as copepods, living in the ocean and in lakes. The word diel comes from the Latin dies day, and means a 24-hour period. The migration occurs when organisms move up to the uppermost layer of the sea at night and return to the bottom of the daylight zone of the oceans or to the dense, bottom layer of lakes during the day. It is important to the functioning of deep-sea food webs and the biologically driven sequestration of carbon.In terms of biomass, it is the largest synchronous migration in the world. It is not restricted to any one taxon as examples are known from crustaceans (copepods), molluscs (squid), and ray-finned fishes (trout).The phenomenon may be advantageous for a number of reasons, most typically to access food and avoid predators. It is triggered by various stimuli, the most prominent being response to changes in light intensity, though evidence suggests that biological clocks are an underlying stimulus as well. While this mass migration is generally nocturnal, with the animals ascending from the depths at nightfall and descending at sunrise, the timing can be altered in response to the different cues and stimuli that trigger it. Some unusual events impact vertical migration: DVM can be absent during the midnight sun in Arctic regions and vertical migration can occur suddenly during a solar eclipse. The phenomenon also demonstrates cloud-driven variations.
Numerology
Chaldean Numerology
The numerical value of diel vertical migration in Chaldean Numerology is: 3
Pythagorean Numerology
The numerical value of diel vertical migration in Pythagorean Numerology is: 1
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"diel vertical migration." Definitions.net. STANDS4 LLC, 2024. Web. 29 Apr. 2024. <https://www.definitions.net/definition/diel+vertical+migration>.
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