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2024-04-21T13:43:35Z

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[[File:Neuston,_Plankton,_Nekton,_Benthos.jpg|Neuston, Plankton, Nekton, Benthos|thumb]] '''Nekton''' refers to the aggregate of actively swimming aquatic organisms in a body of water, able to move independently of water currents. Unlike [[plankton]], which are primarily passive drifters, nektonic organisms have the ability to swim against water currents. This group includes a wide range of organisms, such as [[fish]], [[cephalopods]] like [[squid]] and [[octopus]], and marine mammals like [[whales]], [[dolphins]], and [[seals]]. Nekton are crucial components of the [[aquatic ecosystem]], playing significant roles in the structure and function of [[marine]] and [[freshwater]] habitats.

==Characteristics==
Nektonic organisms share several key characteristics, including:
* **Mobility**: They possess the ability to move actively and with direction in the water.
* **Size**: Nekton range from small fishes to the largest animals on Earth, like the [[blue whale]].
* **Location**: They inhabit various depths and areas of water bodies, from surface waters to the deep sea.

==Ecological Role==
Nekton play vital roles in aquatic ecosystems:
* **Predation**: They are often top or mid-level predators, controlling the population of [[plankton]] and other nekton.
* **Prey**: They also serve as prey for larger nektonic organisms, linking different trophic levels.
* **Nutrient Cycling**: Through their feeding and excretion, nekton contribute to the cycling of nutrients in aquatic environments.

==Classification==
Nekton can be broadly classified into three main groups:
* **Fish**: This is the largest and most diverse group, including species from various [[fish]] families.
* **Cephalopods**: This group includes active swimmers like [[squid]], [[octopus]], and [[cuttlefish]].
* **Marine Mammals**: Including [[whales]], [[dolphins]], [[seals]], and [[manatees]].

==Challenges and Threats==
Nekton face several threats, including:
* **Overfishing**: Excessive fishing has led to the decline of many nektonic species.
* **Habitat Destruction**: Coastal development, pollution, and other human activities have degraded habitats.
* **Climate Change**: Changes in water temperature and chemistry affect the distribution and survival of nekton.

==Conservation==
Efforts to conserve nekton include:
* **Marine Protected Areas (MPAs)**: Establishing MPAs to safeguard critical habitats.
* **Sustainable Fishing Practices**: Implementing quotas and sustainable fishing methods to prevent overfishing.
* **Research and Monitoring**: Conducting research to understand nekton ecology and monitoring populations for conservation management.

[[Category:Aquatic ecology]]
[[Category:Marine biology]]
[[Category:Oceanography]]

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Nekton - Revision history

Prab: CSV import