Concept of Ecology

Geography and Environment (RAS)

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Consider the following statements regarding Ecological niche

1. Ecological niche may be defined as the functional role and position of species in its ecosystem.

2. The greater the niche diversity, the less is ecosystem stability.

3. Dominant species occupy an extensive and broader ecological niche in comparison to less dominant species.

Which of the statements given above are correct?

1 and 2 only

2 and 3 only

1 and 3 only

1, 2 and 3

Ecological niche :

Ecological niche is a term for the position of a species within an ecosystem, describing both the range of conditions necessary for persistence of the species, and its ecological role in the ecosystem
Ecological niche subsumes all of the interactions between a species and the biotic and abiotic environment, and thus represents a very basic and fundamental ecological concept.
The reason is that ecology is about interactions between organisms, and if persistence of a species is determined by the presence of other species (food sources, competitors, predators, etc.); all species are naturally both affected by environment, and at the same time affect the environment for other species.
Ecological niche may be de fi ned as the functional role and position of species in its ecosystem.
Dominant species occupy an extensive and broader ecological niche in comparison to less dominant species.