What is a $Keystone$ species?

  • A
    $A$ species that has a high population density in a given ecosystem.
  • B
    $A$ species that has a low population density but plays a critical role in maintaining the structure and function of an ecosystem.
  • C
    $A$ species that has a high population density but has very little ecological significance.
  • D
    Both $A$ and $C$.

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Who is known as the father of ecosystem ecology?

Which of the following is the major source of phosphorus?

Which of the following is an artificial ecosystem?

Distinguish between primary succession and secondary succession based on the following examples:
$I-$ Abandoned farmland
$II-$ Burned or cut forests
$III-$ Newly cooled lava
$IV -$ Bare rock
$V -$ Flooded lands
$VI -$ Newly created pond or reservoir
Identify the correct grouping for primary succession and secondary succession respectively.

Which of the following is a man-made ecosystem?

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