Which one of the following is the best description of the term 39 Niche 39 ........

Environment and Ecology Concept of Ecology

Which one of the following is the best description of the term 'Niche'?

It is set of biotic and abiotic conditions in which a species is able to persist and maintain stable population sizes.

This means that if the species were to disappear from the ecosystem no other species would be able to fill its ecological niche.

It is a species whose presence, absence or abundance, and changes therein, can indicate certain environmental conditions.

It is very sensitive to changes in the environment, is one of the most preferred indicator species of urban ecosystems.

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Explanation:

G. Evelyn Hutchinson made conceptual advances in 1957 by introducing a widely adopted definition: "the set of biotic and abiotic conditions in which a species is able to persist and maintain stable population sizes." The ecological niche is a central concept in the ecology of organisms and is sub-divided into the fundamental and the realized niche. The fundamental niche is the set of environmental conditions under which a species is able to persist. The realized niche is the set of environmental plus ecological conditions under which a species persists.