Environment section
Frequently asked topics of APSC
Ecological Niche refers to the role and position a species has in its environment — how it obtains resources, interacts with other organisms, and contributes to the ecosystem.
Coined by Joseph Grinnell (1917) and later expanded by G.E. Hutchinson.
Types of Niche
- Fundamental Niche:
The full range of environmental conditions and resources an organism can theoretically use.
Ideal condition in absence of competition.
- Realized Niche:
The actual set of conditions used by the organism in nature due to competition and constraints.
- Habitat Niche:
Where a species lives (e.g., canopy, understory).
- Trophic Niche:
The species’ position in the food chain (e.g., producer, primary consumer).
- Reproductive Niche:
How and where species reproduce and raise offspring.
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