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Keystone species

Posted on : 28 Dec 2019

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  • Keystone species is a species whose addition to or loss from an ecosystem leads to major changes in abundance or occurrence of at least one other species. Certain species in an ecosystem are considered more important in determining the presence of many other species in that ecosystem.
  • All top predators (Tiger, Lion, Crocodile, Elephant) are considered as keystone species because it regulates all other animals’ population indirectly. Hence top predators are given much consideration in conservation.
  • Key stone species deserve special attention from the conservation point of view. Conservation of keystone species encourages the conservation of all other relevant species associated with this.
  • If the keystone species is lost, it will result in the degradation of the whole ecosystem. For example certain plant species (ebony tree, Indian-laurel) exclusively depend upon bats for its pollination. If the bat population is reduced then regeneration of particular plants becomes more difficult. This changes the vegetation structure which adversely influences the dependent animals.

Flagship species

  • It is a species chosen to represent an environmental cause, such as an ecosystem in need of conservation.

Indicator species

  • It is a species whose presence indicates the presence of a set of other species and whose absence indicates the lack of that entire set of species.

Article Related Questions

  1. Which of the following statements refers to the Keystone species?

  2. 1.A species chosen to represent an environmental cause, such as an ecosystem in need of conservation.

    2.A species whose presence indicates the presence of a set of other species and whose absence indicates the lack of that entire set of species.

    3.A species whose addition to or loss from an ecosystem leads to major changes in abundance or occurrence of at least one other species.

    4.None of the above

    Right Ans : A species whose addition to or loss from an ecosystem leads to major changes in abundance or occurrence of at least one other species.

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