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Spindle shaped pyramid of number is noti...

Spindle shaped pyramid of number is noticed in forest ecosystem. Give Reasons.

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In a forest ecosystem the pyramid of number is spindle in shape, it is because the base `(T_(1))` of the pyramid occupies large sized trees (Producer) which are lesser in number. Herbivores `(T_(2))` (Fruit eating birds, elephant and deer) occupying second trophic level, are more in number than the producers. In final trophic level `(T_(4))`, tertiary consumers (lion) are lesser in number than the secondary consumer `(T_(3))` (fox and snake).
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Knowledge Check

  • The upright pyramid of number is absent in

    A
    Lake
    B
    Grassland
    C
    Pond
    D
    Forest

  • Assertion: In forest ecosystem the pyramid of number is somewhat different in shape. Reason: The pyramid of number in forest ecosystem looks spindle shaped.

    A
    Assertion and Reason are correct, Reason is the correct explanation of Assertion.
    B
    Assertion and Reason are correct, Reason is not the correct explanation of Assertion.
    C
    Assertion is false, Reason is true.
    D
    Assertion and Reason are false.

  • Spindle shaped pyramid is a character of ………. .

    A
    Pond ecosystem
    B
    Grassland ecosystem
    C
    Parasite ecosystem
    D
    Forest ecosystem

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    Generally the pyramid of number in forest ecosystem looks spindle shape. State your reason.

    (I) Pyramid of Number of forest ecosystem is different in shape. (II) The base (T) of the pyramid occupies large sized trees (III) Tertiary consumers are greater in number than the secondary consumer. (IV) The pyramid of number in forest ecosystem looks spindle shaped.

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