The space a species occupies in the ecosystem to which it belongs and the role it plays (where it lives, what it feeds on, and how it performs all its activities).
A niche refers to the specific role or position that an organism occupies within its environment. This includes how it interacts with other organisms, its habitat, and how it uses resources like food, water, and shelter. The concept is central to understanding ecosystems and species interactions.
Types of Niches:
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Ecological Niche:
- Describes how an organism fits into an ecosystem. It includes its role in the food chain (e.g., producer, consumer, decomposer), the conditions it needs to survive, and its interactions with other species.
- Example: A bee's niche involves pollinating flowers and gathering nectar for its colony.
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Fundamental Niche:
- The full range of environmental conditions and resources an organism can theoretically use without competition or other limiting factors.
- Example: A plant species might grow in a wide range of temperatures if no competitors are present.
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Realized Niche:
- The actual conditions and resources an organism uses in the presence of competition, predators, or other pressures.
- Example: A plant might only thrive in shaded areas because other plants outcompete it in sunny regions.
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Economic or Social Niche (non-ecological):
- In a broader context, a niche can also mean a specialized position in a market or a role someone plays in a social or professional setting.
- Example: A business might find its niche by offering eco-friendly products in a competitive market.
Importance of Niches:
- Species Coexistence: Reduces competition by allowing species to specialize in different roles.
- Ecosystem Stability: Ensures energy flow and nutrient cycling as each species contributes differently to the system.
- Adaptation and Evolution: Species evolve traits to better fit their niches, driving biodiversity.
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