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Plankton, Nekton, Benthos
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Plankton, Nekton, Benthos:
Exploring the Ocean
Plankton
Plankton cannot propel themselves through water.
Nekton is composed of animals that actively swim and dive in the water. These include fish, whales, turtles, sharks, etc.
Nekton propel themselves through water by swimming or other means. Nektons are either vertabraes (fish) or invertabraes (shrimp).
Benthos
The major difference between these organisms is in their habitat. While all of the animals inhabit oceanic areas, the zone in which they inhabit greatly impacts the evolution of such organisms.
For example, a plankton is largely different from benthos in that a benthos organism is far more capable of sustaining colder temperatures as sunlight penetration is impossible at such deep levels.
The bottom floor of the ocean is commonly not a place in which a rich amount of dissolved nutrients is found. In fact, due to upwellings (the movement of nutrients to shore) and the immense dissolving of oxygen on the ocean's surface, this is an area far more sustainable.
Hanna Brumbelow
Enviro. C3 GQ3 G/H
Benthos
The benthos includes animals that are ecologically linked to the ocean's floor. Including many echinoderms, benthonic fishes, crustaceans, mollusks, poriferans and annelids.
Plankton
Plankton is formed by the algae and small animals that float towards the water's surface.
Nekton
Background photo by t.shigesa