They maintain biodiversity.
They keep populations under control.
The term is biodiversity. High biodiversity means a large number of different species in an ecosystem. An ecosystem with many different species is less likely to be disrupted by environmental changes.
Migration can negatively impact an ecosystem if the migration is permanent and leads to the loss of native species. Temporary migration, such as in the case of birds flying south in the winter, can maintain the biodiversity of an ecosystem. Microevolution, like migration, can aid the survival of native species.
keystone species
Keystone species are those which play a major role in determining which species exist in a particularcommunity. They are critical factors in ecological processes such as energy flow and nutrient cycling.If we can identify a keystone species and quantify its impact on its community then we can usually understand how the community functions as a whole. The importance of these species is such that their loss from a community may bring about a cascade of other species extinctions. Often a keystone species is not recognised until it is wiped out and many other species which were dependant upon it disappear also.
They maintain biodiversity
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In an ecosystem, a large number of species are dependent of one species of bird. This species of bird is an example of a keystone species.
The keystone species is critical to maintaining the stability of an ecosystem, and changes in its population indicate changes in ecosystem health.
A keystone species is one that other lifeforms in an ecosystem depend on. Mosquitoes are a keystone species because they are extremely low on the food chain, and if they were removed from an ecosystem, the food supply would be interrupted.
They maintain biodiversity.
Keystone Species
The term is biodiversity. High biodiversity means a large number of different species in an ecosystem. An ecosystem with many different species is less likely to be disrupted by environmental changes.
The American alligator, gray wolf and gopher tortoise are all examples of keystone species. The loss of a keystone species will upset the balance of an ecosystem.
keystone species is a species that has an unusually large impact on its ecosystem.
keystone species
This is a "keystone" species.
Keystone